mcq computer science

1.For the 8-bit word 00111001, the check bits stored with it would be 0111. Suppose when the word is read from memory, the check bits are calculated to be 1101.What is the data word that was read from memory?

A. 10011001

B. 00011001

C. 00111000

D. 11000110

View/Hide Ans Correct Answer is B

Explanation

2.

Consider a 32 - bit microprocessor, with a 16 - bit external data bus, driven by an 8 MHz input clock. Assume that the microprocessor has a bus cycle whose minimum duration equals four input clock cycles. What is maximum data transfer rate for this microprocessor ?

A. 8 x 106 bytes / sec

B. 4 x 106 bytes / sec

C. 16 x 106 bytes / sec

D. 4 x 109 bytes / sec


Explanation

3. The RST 7 instruction in 8085 microprocessor is equivalent to

A. CALL 0010 H

B. CALL 0034 H

C. CALL 0038 H

D. CALL 003C H

View/Hide Correct Answer is C

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Ans

Explanation

4. The equivalent hexadecimal notation for octal number 2550276 is:

A. FADED

B. AEOBE

C. ADOBE

D. ACABE

View/Hide Ans Correct Answer is C

Explanation

5.

The CPU of a system having 1 MIPS execution rate needs 4 machine cycles on an average for executing an instruction. The fifty percent of the cycles use memory bus. A memory read/write employs one machine cycle. For execution of the programs, the system utilizes 90 percent of the CPU time. For block data transfer, an IO device is attached to the system while CPU executes the background programs continuously. What is the maximum IO data transfer rate if programmed IO data transfer technique is used?

A. 500 Kbytes/sec

B. 2.2 Mbytes/sec

C. 125 Kbytes/sec

D. 250 Kbytes/sec

View/Hide Ans Correct Answer is D

Explanation

6. The number of Flip-Flops required to design a modulo - 272 counter is

A. 8

B. 9









C. 27

D. 11


Explanation

7.

Let E1 and E2 be two entities in E-R diagram with simple single valued attributes. R1 and R2 are two relationships between E1 and E2 where R1 is one-many and R2 is many - many. R1 and R2 donot have any attributes of their own. How many minimum number of tables are required to represent this situation in the relational model ?

A. 4

B. 3

C. 2

D. 1

View/Hide Ans Correct Answer is A

Explanation

8.

The student information in a university is stored in the relation STUDENT (name, sex, marks, dept_Name) Consider the following SQL query select deptName from STUDENT where sex = 'M' group by dept_Name having avg (marks) > (select avg (marks) from STUDENT) It returns the names of the department in which

A. the average marks of male students is more than the average marks of the students in the same department

B. The average marks of male students is more than the average marks of the students in the university

C. The average marks of male students is more than the average marks of male students in the university

D. The average marks of students is more than the average marks of male students in the university

View/Hide Correct Answer is D








Ans

Explanation

9. Which one of the following statements about normal forms is FALSE?

A. Lossless, preserving decomposition into 3NF is always possible

B. Lossless, preserving decomposition into BCNF is always possible

C. Any relation with two attributes is in BCNF

D. BCNF is stronger than 3NF


Explanation

10. The relation vendor order (v_no, v_ord_no, v_name, qty_sup, unit_price) is in 2NF because :

A. Non key attribute V_name is dependent on V_no which is part of composite key

B. Non key attribute V_name is dependent on qty_sup

C. key attribute qty_sup is dependent on primary_key unit price

D. key attribute v_ord_no is dependent on primary_key unit price


Explanation

Answer Key and Solved Questions Paper-3 UGC-NET Computer Science June 2015

11. the relational schemas R1 and R2 form a loseless join decomposition of R if and only if

A. R1∧R2-->(R1-R2)

B. R1-->R2

C. R1∧R2-->(R2-R1)









D. R2-->R1∧R2


Explanation

12. In the index allocation scheme of blocks to a file, the maximum possible size of the file depends on

A. The number of blocks used for the index, and the size of the index

B. The size of the blocks, and the size of the address

C. size of the index

D. size of the blocks


Explanation

13. Give the number of principal vanishing point (s) along with their direction for the standard perspective transformation :

A. only one in the direction K

B. Two in the directions I and J

C. Three in the directions I, J and K

D. Only two in the directions J and K


Explanation

14.Consider a triangle represented by A(0, 0), B(1, 1), C(5, 2). The triangle is rotated by 45 degrees about a point P( -1, -1). The co-ordinates of the new triangle obtained after rotation shall be

A. A'(-1, √2 -1), B'(-1, 2√2 - 1), C'((3/2)√2 - 1, (9/2)√2 - 1)

B. A'(√2 -1,- 1), B'( 2√2 - 1, -1), C'((3/2)√2 - 1, (9/2)√2 - 1)

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C. A'(-1, √2 -1), B'(2√2 - 1, -1), C'((3/2)√2 - 1, (9/2)√2 - 1)

D. A'(-1, √2 -1), B'( 2√2 - 1, -1), C'((9/2)√2 - 1, (3/2)√2 - 1)


Explanation

15. The process of dividing an analog signal into a string of discrete outputs, each of constant amplitude is called

A. Strobing

B. Amplification

C. Conditioning

D. Quantization


Explanation

16. which of the following is not a basic primitive of the graphics kernel system(GKS) ?

A. POLYLINE

B. POLYDRAW

C. FILL AREA

D. POLYMARKER


Explanation

17. Which of the following statements is/are incorrect ?

A.Mapping the co-ordinates of the points and lines that form the picture into appropriate co-ordinates on the device or workstation is known as viewing transformation.










B. The right handed cartesian co-ordinate system in whose coordinates we describe the picture is known as world coordinate system.

C. The co-ordinate system that corresponds to the device or workstation where the image is to be displayed is known as physical device co-ordinate system.

D.

Left-handed co-ordinate system in which the display area of the virtual display device corresponds to the unit(|x|) square whose lower left handed corner is at origin of the co-ordinate system, is known as normalized device co-ordinate system.


Explanation

18.

Match the following

List-I List-II

Flood Gun An electron gun designed to flood the entire screen with electrons.

Collector Partly energised by flooding gun, stores the charge generated by the writing gun

Ground used to discharge the collector

Phosphorus Grains

used in memory -tube display and similar to those used in standard CRT

Writing Gun System

used in memory -tube display and basically the same as the electron gun used in a conventional CRT.

Codes : (a) (b) (c) (d) (e)

A. (i) (ii) (iii) (iv) (v)

B. (ii) (iii) (i) (iv) (v)

C. (iii) (i) (ii) (v) (iv)

D. (iv) (v) (i) (ii) (iii)

View/Hide Correct Answer is A





Ans

Explanation

19. Minimal Deterministic finite automaton for the language L = { 0n | n > 0, n ≠ 4 } will have

A. 1 final state among 5 states

B. 4 final states among 5 states

C. 1 final state among 6 states

D. 5 final states among 6 states


Explanation

20. The regular expression corresponding to the language L where L = { x ∈ {0,1}* | x ends with 1 and does not contain substring 00 } is

A. (1 + 01)*(10 + 01)

B. (1 + 01)*01

C. (1 + 01)*(1 + 01)

D. (10 + 01)* 01


Explanation


21. The transition function for the language L = {w|na(w) and nb(w) are both odd} is given by:

δ(q0, a) = q1 δ(q0, b) = q2

δ(q1, a) = q0 δ(q1, b) = q3

δ(q2, a) = q3 δ(q2, b) = q0









δ(q3, a) = q2 δ(q3, b) = q1

the initial and final states of automata are

A. q0 and q0 respectively

B. q0 and q1 respectively

C. q0 and q2 respectively

D. q0 and q3 respectively


Explanation

22. The clausal form of the disjunctive normal form ¬A ∨ ¬B ∨ ¬C ∨D is

A. A ∧ B ∧ C ⇒ D

B. A ∨ B ∨ C ∨ D ⇒ true

C. A ∧ B ∧ C ∧ D ⇒ true

D. A ∧ B ∧ C ∧ D ⇒ false


Explanation

23. Which of the following is false for the programming language PROLOG ?

A. A PROLOG variable can only be assigned to a value once

B. PROLOG is a Strongly Typed Language.

C. The scope of a variable in PROLOG is a single clause or rule.

D. the scope of a variable in PROLOG is a Single Query










Explanation

24. Which one of the following is true ?

A. The resolvent of two horn clauses is not a horn clause.

B. The resolvent of two horn clauses is a Horn Clause.

C. if we resolve a negated goal G against a fact or rule A to get Clause C then C has positive literal and non null goal.

D. if we resolve a negated goal G against a fact or rule A to get clause C then C has positive literal or null goal.


Explanation

25. Which transmission technique guarantees that data packets will be received by the receiver in the same order in which they were sent by the sender ?

A. Broadcasting

B. Unicasting

C. Packet Switching

D. Circuit Switching


Explanation

26. Which of the following control fields in TCP header is used to specify the sender has no more data to transmit ?

A. FIN

B. RST

C. SYN

D. PSH









Explanation

27. Which are the two modes of IP security ?

A. Transport and Certificate

B. Transport and Tunnel

C. Certificate and Tunnel

D. Preshared and Transport


Explanation

28.A message "COMPUTERNETWORK" encrypted(ignore quotes)using columnar transposition cipher with a key "LAYER". the encrypted message is :

A. CTTOEWMROPNRUEK

B. MROUEKCTTPNROEW

C. OEWPNRCTTUEKMRO

D. UEKPNRMROOEWCTT


Explanation

29.

Suppose a digitized voice channel is made by digitizing 8 kHz bandwidth analog voice signal. It is required to sample the signal at twice the highest frequency(two samples per hertz). what is the bit rate required, if it is assumed that each sample requires 8 bits ?

A. 32 kbps

B. 64 kbps










C. 128 kbps

D. 256 kbps


Explanation

30. The Maximum payload of a TCP segment is

A. 65535

B. 65515

C. 65495

D. 65475


Explanation


31. All pair Shortest paths problem is efficiently solved using :

A. Dijkstra' algorithm

B. Bellman-Ford algorithm

C. Kruskal Algorithm

D. Floyd-Warshall algorithm


Explanation

32. The travelling salesman problem can be solved in :

A. Polynomial time using dynamic programming algortihm

B. Polynomial time using branch and bound algortihm










C. Exponential time using dynamic programming algorithm or branch and bound algorithm.

D. Polynomial time using backtracking algorithm.


Explanation

33. Which of the following is asymptotically smaller ?

A. lg(lg*n)

B. lg*(lg n)

C. lg(n!)

D. lg*(n!)


Explanation

34.Consider a hash table of size m=100 and the hash function h(k) = floor(m(kA mod 1)) for A = (√5 − 1)/2 = 0.618033. Compute the location to which the key k = 123456 is placed in hash table.

A. 77

B. 82

C. 88

D. 89


Explanation

35. Let f(n) and g(n) be asymptotically non-negative functions. which of the following is correct ?

A. θ(f(n) * g(n)) = min(f(n), g(n))










B. θ(f(n) * g(n)) = max(f(n), g(n))

C. θ(f(n) + g(n)) = min(f(n), g(n))

D. θ(f(n) + g(n)) = max(f(n), g(n))


Explanation

36. The number of nodes of height h in any n - element heap is _____

A. h

B. zh

C. ceil(n/zh)

D. ceil(n/zh + 1)


Explanation

37. In Java, when we implement an interface method, it must be declared as :

A. Private

B. Protected

C. Public

D. Friend


Explanation

38. The Servlet Response interface enables a servlet to formulate a response for a client using the method ______

A. void log(Exception e, String s)










B. Void destroy()

C. int getServerPort()

D. void setContextType(String Type)


Explanation

39. Which one of the following is correct ?

A. Java Applets cannot be written is many programming languages.

B. An applet is not a small program.

C. An applet can be run on its own.

D. Applets are embedded in another applications.


Explanation

40. In XML we can specify the frequency of an element by using the symbols :

A. + * !

B. # * !

C. + * ?

D. - * ?


Explanation


41. In XML, Doctype declaration specifies to include a reference to ____ file

A. Document Type Definition










B. Document Type Declaration

C. Document Transfer Definition

D. Document Type language


Explanation

42. Module design is used to maximize cohesion and minimize coupling. Which of the following is the key to implement this rule ?

A. Inheritance

B. Polymorphism

C. Encapsulation

D. Abstraction


Explanation

43. Verification :

A. refers to the set of activities that ensure that software correctly implements a specific function.

B. gives answer to the question - are we building the product right ?

C. requires execution of software

D. both 1 and 2


Explanation

44. Which design matric is used to measure the compactness of the program in terms of lines of code ?










A. Consistency

B. Conciseness

C. Efficiency

D. Accuracy


Explanation

45. Requirements prioritization and negotiation belongs to :

A. Requirements validation

B. Requirements elicitation

C. Feasibility Study

D. Requirement reviews


Explanation

46. Adaptive maintenance is a maintenance which ______

A. Correct errors that were not discovered till testing phase.

B. is carried out to port the existing software to a new environment.

C. improves the system performance.

D. both (2) and (3)


Explanation

47. A design concept refinement is a

A. Top-down Approach










B. Complementary of Abstraction concept

C. Process of elaboration

D. All of the above


Explanation

48. A software design is highly modular if :

A. cohesion is functional and coupling is data type.

B. cohesion is coincidental and coupling is data type.

C. cohesion is sequential and coupling is content type.

D. cohesion is functional and coupling is stamp type.


Explanation

49.

Match the following for operating system techniques with the most appropriate advantage :

List-I List-II

(a) Spooling (i) Allows several jobs in memory to improve CPU utilization

(b) Mult iprogramming

{ii) Access to shared resources among geographically dispersed computers in a transparent way

(c) Time sharing overlapping I/O and computations

Distributed Computing

Allows many users to share a computer simultaneously by switching processor frequently

codes : (a) (b) (c) (d)







A. (iii) (i) (ii) (iv)

B. (iii) (i) (iv) (ii)

C. (iv) (iii) (ii) (i)

D. (ii) (iii) (iv) (i)


Explanation

50. Which of the following statements is not true for Multi Level Feedback Queue processor scheduling algorithm ?

A. Queues have different priorities.

B. Each queue may have different scheduling algorithm

C. Processes are permanently assigned to a queue

D. This algorithm can be configured to match a specific system under design


Explanation

51.What is the most appropriate function of Memory Management Unit (MMU) ?A.It is an associative memory to store TLBB.It is a technique of supporting multi programming by creating dynamic partitionsC.It is a chip to map virtual address to physical addressD.It is an algorithm to allocate and deallocate main memory to a processView/Hide AnsCorrect Answer is BExplanation52.Dining Philosopher's problem is aA.Producer Consumer problemB.Classical IPC problemC.Starvation ProblemD.Synchronization PrimitiveView/Hide AnsCorrect Answer is BExplanation53.In ______ allocation method for disk block allocation in a file system, insertion and deletion of blocks in a file is easy.A.IndexB.LinkedC.ContiguousD.Bit MapView/Hide AnsCorrect Answer is AExplanation54.A unix file may be of type :A.Regular fileB.Directory FileC.Device FileD.Any one of the aboveView/Hide AnsCorrect Answer is DExplanation55.Match the following :

List-I List-II















(a) Intelligence (i) Contextual, tacit, transfer needs learning

(b) Knowledge (ii) Scattered facts, easily transferrable

(c) Information (iii) Judgemental

(d) Data (iv) Codifiable, endorsed with relevance and purpose

codes : (a) (b) (c) (d)A.(iii) (ii) (iv) (i)B.(iii) (i) (iv) (ii)C.(i) (ii) (iii) (iv)D.(i) (iii) (iv) (ii)View/Hide AnsCorrect Answer is BExplanation74.WOW32 is aA.Win 32 API library for creating processes and threads.B.Special kind of file system to the NT name space.C.Kernel - mode objects accessible through Win32 APID.Special execution environment used to run 16 bit windows applications on 32 - bit machines.View/Hide AnsCorrect Answer is DExplanation75.The Unix command : $ vi file1 file2A.Edits file1 and stores the contents of file1 in file2B.Both files i.e File1 and file2 can be edited using "ex" command to travel between filesC.Both files can be edited using the "mv" command to move between the filesD.Edits file1 first, saves it and the edits file2View/Hide AnsCorrect Answer is BExplanation

Operating System

1.If the disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O blocks requests are 98, 37, 14, 124, 65, 67.

A. 239

B. 310

C. 321

D. 325

View/Hide Ans Correct Answer is c

Explanation

http://www.brightways.org/ugc-net-gate-mcq-operating-system.php#!









2. Which of the following memory allocation scheme suffers from external fragmentation ?

A. Segmentation

B. Pure demand paging

C. Swapping

D. Paging

View/Hide Ans Correct Answer is a

Explanation

3.Consider a system having m resources of the same type. These resources are shared by 3 processes A, B and C which have peak demands of 3, 4 and 6 respectively. For what value of m deadlock will not occur ?

A. 7

B. 9

C. 10

D. 13

View/Hide Ans Correct Answer is d

Explanation

4. Pre-emptive scheduling is the strategy of temporarily suspending a running process

A. before the CPU time slice expires

B. to allow starving processes to run

C. when it requests I/O

D. to avoid collision


Explanation

5. Resources are allocated to the process on non-sharable basis is










A. mutual exclusion

B. hold and wait

C. no pre-emption

D. circular wait


Explanation

6. In round robin CPU scheduling as time quantum is increased the average turn around time

A. increases

B. decreases

C. remains constant

D. varies irregularly


Explanation

7.Pool based allocation of memory achieves better usage. Memory can be preempted from inactive programs and used to accommodate active programs. This is called

A. Preemption

B. Swapping

C. Spooling

D. Scheduling

View/Hide Ans Correct Answer is b

Explanation

8. Which of these is an example of a virtual resource?

A. Print server










B. Virtual machine

C. Virtual memory

D. All of the above


Explanation

9. Which concept explains the working of an Operating System?

A. It is event driven

B. It is object oriented

C. It is procedure based system software

D. It is a collection of procedures that interact with each other


Explanation

10. Which of these is/are the desirable features of an Operating system

A. Extensible

B. Portable

C. Reliable

D. All of the above


Explanation

11. Blocking and Caching are the terms associated with which Operating system functions respectively

A. Memory management and Disk Scheduling

B. IOCS and Disk Scheduling










C. IOCS and Memory management

D. Process management and IOCS


Explanation

12. Which of these is not a term describing the collection of Operating Programs

A. Monitor

B. Kernel

C. Supervisor

D. Server


Explanation

13. Transparency is a desirable feature of which type of Operating system-

A. Batch Processing

B. Real time

C. Distributed

D. Time sharing


Explanation

14. Which operating system implementation has to focus on the issue of Good response time

A. Batch Processing

B. Multiprogramming

C. Distributed

D. Time sharing

http://www.brightways.org/ugc-net-gate-mcq-operating-system.php?page=2#!










Explanation

15. Program Priorities, Preemption are the key concepts of

A. Batch Processing

B. Real time

C. multiprogramming

D. Time sharing


Explanation

16. Which operating system implementation has to focus on the issue of resource sharing?

A. Batch Processing

B. Multiprogramming

C. Distributed

D. Time sharing


Explanation

17. This OS interleaves execution of processes in an application program to meet its deadline

A. Batch Processing

B. Real time

C. multiprogramming

D. Time sharing













Explanation

18. What in multiprogramming OS provides a foolproof method of implementing memory protection to avoid program interference?

A. Direct Memory Access

B. Privileged mode

C. Memory Protection

D. Both 2 and 3


Explanation

19. What are the functions of multiprogramming OS?

A. Scheduling

B. Memory Management

C. I/O management

D. All of above


Explanation

20. Applications like Banking and reservations require which type of OS?

A. Real Time

B. Hard Real Time

C. Soft Real Time

D. None of the above


21. What feature of RTOS is supported by executing parts of a computation in different computer systems?










A. Computation speed up

B. Resource sharing

C. Reliability

D. Communication


Explanation

22. Which OS employs the techniques of fault tolerance and graceful degradation to ensure continuity of operation?

A. Batch Processing

B. Real time

C. Distributed

D. Time sharing


Explanation

23.Pool based allocation of memory achieves better usage. Memory can be preempted from inactive programs and used to accommodate active programs. This is called

A. Preemption

B. Swapping

C. Spooling

D. Scheduling


Explanation

24. Which of these is an example of a virtual resource?

A. Print server










B. Virtual machine

C. Virtual memory

D. All of the above


Explanation

25. Which concept explains the working of an Operating System?

A. It is event driven

B. It is object oriented

C. It is procedure based system software

D. It is a collection of procedures that interact with each other


Explanation

26. Which of these is/are the desirable features of an Operating system

A. Extensible

B. Portable

C. Reliable

D. All of the above


Explanation

27. Blocking and Caching are the terms associated with which Operating system functions respectively

A. Memory management and Disk Scheduling

B. IOCS and Disk Scheduling

C. IOCS and Memory management










D. Process management and IOCS


Explanation

28. Which of these is not a term describing the collection of Operating Programs

A. Monitor

B. Kernel

C. Supervisor

D. Server


Explanation

29. Transparency is a desirable feature of which type of Operating system-

A. Batch Processing

B. Real time

C. Distributed

D. Time sharing


Explanation

30. Which operating system implementation has to focus on the issue of Good response time

A. Batch Processing

B. Multiprogramming

C. Distributed

D. Time sharing

View/Hide Correct Answer is d











Ans

31. Program Priorities, Preemption are the key concepts of

A. Batch Processing

B. Real time

C. multiprogramming

D. Time sharing


Explanation

32. Which operating system implementation has to focus on the issue of resource sharing?

A. Batch Processing

B. Multiprogramming

C. Distributed

D. Time sharing


Explanation

33. This OS interleaves execution of processes in an application program to meet its deadline

A. Batch Processing

B. Real time

C. multiprogramming

D. Time sharing











Explanation

34. What in multiprogramming OS provides a foolproof method of implementing memory protection to avoid program interference?

A. Direct Memory Access

B. Privileged mode

C. Memory Protection

D. Both 2 and 3


Explanation

35. What are the functions of multiprogramming OS?

A. Scheduling

B. Memory Management

C. I/O management

D. All of above


Explanation

36. Applications like Banking and reservations require which type of OS?

A. Real Time

B. Hard Real Time

C. Soft Real Time



Explanation

37. What feature of RTOS is supported by executing parts of a computation in different computer systems?











A. Computation speed up

B. Resource sharing

C. Reliability

D. Communication


Explanation

38. Which OS employs the techniques of fault tolerance and graceful degradation to ensure continuity of operation?

A. Batch Processing

B. Real time

C. Distributed

D. Time sharing


Explanation

39.If ttra and tcam are the time taken to transfer a block from memory to cache and access time of cache memory respectively, then what will be the effective memory access time if h is the hit ratio

A. h+ ttra *(1+ tcam)

B. h*tcam +(1-h) *(ttra+tcam)

C. h +(1-h) *(ttra+tcam)

D. (h+1)*tcam +(1-h) *(ttra+tcam)


Explanation

40. Programs tend to make memory accesses that are in proximity of previous access this is called

A. spatial locality










B. temporal locality

C. reference locality

D. access locality


Explanation

41. Which term means to access some data and instructions repeatedly?

A. spatial locality

B. temporal locality

C. reference locality

D. access locality


Explanation

42.Processor architectures use several levels of cache memories to reduce the effective memory access time. which is the correct match i)L1 Cache a) part of memory chip ii)L2 Cache b) Cache on CPU Chip ii)L3 Cache c) Cache external to CPU

A. i)-a ii)-b iii)-c

B. i)-b ii)-c iii)-a

C. i)-c ii)-b iii)-a

D. i)-c ii)-a iii)-b


Explanation

43.An Intel processor uses a cache block size of 128 bytes and a memory transfer to cache is about 10 times the access time of cache memory. with cache hit ratio of 0.97 what percent will be the effective memory access to that of access time of memory










A. 20 percent

B. 30 percent

C. 40 percent

D. 50 percent


Explanation

44. Contents of which fields of Program Status Word (PSW) define the subsequent actions of the CPU

A. Condition code, Privileged mode, Program Counter

B. Condition code, Privileged mode, interrupt mask

C. Privileged mode, interrupt mask, interrupt code

D. Privileged mode, interrupt mask, Program Counter


Explanation

45. Which of the following should be a privileged instruction-

A. Load Bound registers

B. Load a value in a CPU Register

C. Forcibly terminate a process

D. All of the above


Explanation

46. Throughput of a multiprogramming OS that processes n programs over th eperiod of time that starts t0 and ends at tf is

A. (tf-t0)/n

B. tf*n/t0










C. n/(tf-t0)

D. n*tf*t0


Explanation

47. Which of these are the reasons for CPU-bound programs having higher priority than the I/O bound programs

A. CPU utilization is better in CPU-bound programs

B. I/O bound programs do not get an opportunity to be executed

C. Period of concurrent CPU and I/O bound activities is rare.

D. All of the above

View/Hide Ans

Explanation

48. Which of these is incorrect in context of Real Time Operating System?

A. Permits creation of multiple processes within an application.

B. Permits priorities to be assigned to the processes.

C. Doesn't allow programmer to define interrupts and interrupt processing routines

D. Provides fault tolerance and graceful degradation capabilities.


Explanation

49. Which of these is not a goal of Scheduling Algorithm for Different Operating Systems

A. Fairness

B. balance

C. maximize throughput










D. Policy enforcement


Explanation

50. Which of these is a disadvantage of first Come First Serve?

A. Convoy Effect

B. Small average and worst-case waiting times

C. Simplicity

D. non-preemptive


51. What is the duration of a time quantum in Round-Robin Scheduling?

A. 10-100 millisec

B. 10-100 nanosec

C. 100-1000 millisec

D. 100-1000 nanosec


Explanation

52. As a rule of thumb what percentage of the CPU bursts should be shorter than the time quantum?

A. 80%

B. 70%

C. 60%

D. 50%












Explanation

53. Interval between the time since submission of the job to the time its results become available, is called

A. Response Time

B. Throughput

C. Waiting time

D. Turnaround Time


Explanation

54. A scheduler which selects processes from Primary memory is called

A. Long Term Scheduler

B. Medium Term Scheduler

C. Short Term Scheduler

D. Job Scheduler


Explanation

55. The scheduling in which CPU is allocated to the process with least CPU-burst time is called

A. Priority Scheduling

B. Round Robin Scheduling

C. Multilevel Queue Scheduling

D. Shortest job first Scheduling


Explanation

56. Which of the following is a fundamental process state











A. blocked

B. executing

C. Waiting

D. swapped


Explanation

57. Which of the following approaches require knowledge of the system state?

A. deadlock detection.

B. deadlock prevention.

C. deadlock avoidance.

D. all of the above.


Explanation

58. Which scheduling policy is used for a batch processing operating system

A. Shortest-job First.

B. Round-Robin.

C. Priority Based

D. First-Come-First-Serve.


Explanation

59. A critical section is a program segment

A. which is having a higher priority.

B. where shared resources are accessed.










C. which forces deadlocks.

D. where code is shared by programs.


Explanation

60. Which amongst the following is a valid page replacement policy?

A. RU policy (Recurrently used)

B. LRU policy (Least Recently Used)

C. only a

D. both a and b


61. SSTF stands for

A. Shortest-Seek-time-first scheduling

B. simple-seek-time-first

C. smallest � seek-time-first.



Explanation

62. Before proceeding with its execution, each process must acquire all the resources it needs is called

A. pre-emption.

B. circular wait.

C. hold and wait

D. deadlock.










Explanation

63. The total time to prepare a disk drive mechanism for a block of data to be read from is its

A. Access Time

B. Seek time

C. latency plus seek time

D. Access time plus seek time plus transmission time


Explanation

64. Which of these is a technique of improving the priority of process waiting in Queue for CPU allocation

A. Starvation

B. Relocation

C. Promotion

D. Ageing


Explanation

65. In which of the following page replacement policies Balady�s anomaly does not occurs? (A) FIFO (B) LRU (C) LFU (D) NRU

A. All of the above

B. B, C and D

C. A and B.

D. Only A













Explanation

66. Page fault frequency in an operating system is reduced when the

A. processes tend to be of an equal ratio of the I/O-bound and CPU-bound

B. size of pages is increased

C. locality of reference is applicable to the process

D. processes tend to be CPU-bound


Explanation

67. Cycle stealing is a term closely associated with-

A. DMA

B. Virtual Memory

C. Processor Scheduler

D. Disk manager


Computer Fundamentals

1. An online backing storage system capable of storing larger quantities of data is

A. CPU

B. Memory

C. Secondary storage

D. Mass Storage


Explanation

http://www.brightways.org/ugc-net-gate-mcq-computer-fundamentals.php#!









2. Which of the following does not affect the resolution of a video display image?

A. Bandwidth

B. Raster scan rage

C. Vertical and horizontal lines of resolution

D. Screen Size


Explanation

3. Latency time is

A. Time to spin the needed data under head

B. Time to spin the needed data under track

C. Time to spin data under sector

D. All of these


Explanation

4. DPI stands for

A. Desktop projection Ink

B. Dot per inch

C. Dot-matrix printer ink

D. Desktop pixel Inch


Explanation

5. Databases software may be divided into

A. five distinct categories










B. four distinct categories

C. three distinct categories

D. two distinct categories


Explanation

6. File record length

A. Should always be fixed

B. Should always be variable

C. Depends upon the size of file

D. Should be chosen to match the data characteristics.


Explanation

7. ......is the time required by a sector to reach below read/write heat

A. Seek Time

B. Latency Time

C. Access Time

D. None


Explanation

8. .......is a technique of improving the priority of process waiting in Queue for CPU allocation

A. Starvation

B. Ageing

C. Revocation










D. Relocation


Explanation

9. A grammar for a programming language is a formal description of

A. Syntax

B. Semantics

C. Structure

D. Code


Explanation

10. ........is a technique of temporarily removing inactive programs from the memory of computer system

A. Swapping

B. Spooling

C. Semaphore

D. Scheduler


1. The memory allocation scheme subject to "external" fragmentation is

A. segmentation

B. swapping

C. pure demand paging

D. multiple fixed contiguous partitions


http://www.brightways.org/ugc-net-gate-mcq-computer-fundamentals.php?page=2#!










Explanation

12. Virtual memory is

A. simple to implement

B. used in all major commercial operating systems

C. less efficient in utilization of memory

D. useful when fast I/O devices are not available


Explanation

13. Before proceeding with its execution, each process must acquire all the resources it needs is called

A. hold and wait

B. No pre-emption

C. circular wait

D. starvation


Explanation

14. The main reason to encrypt a file is to .......

A. Reduce its size

B. Secure it for transmission

C. Prepare it for backup

D. Include it in the start-up sequence


Explanation

15. "LRU" page replacement policy is











A. Last Replaced Unit

B. Last Restored Unit

C. Least Recently Used

D. Least Required Unit


Explanation

16. Which of the following is not a fundamental process state

A. ready

B. terminated

C. executing

D. blocked


Explanation

17. ODBC stands for

A. Object Database Connectivity

B. Oral Database Connectivity

C. Oracle Database Connectivity

D. Open Database Connectivity


Explanation

18. Which two files are used during operations of the DBMS

A. Query languages and utilities

B. DML and query language

C. Data dictionary and transaction log










D. Data dictionary and query language


Explanation

19. A protocol is a set of rules governing a time sequence of events that must take place

A. between peers

B. between an interface

C. between modems

D. across an interface


Explanation

20. In communication satellite, multiple repeaters are known as

A. detector

B. modulator

C. stations

D. transponders


21. Which of the following is required to communicate between two computers?

A. communications software

B. protocol

C. communication hardware

D. all of above including access to transmission medium

View/Hide Correct Answer is d










Ans

Explanation

22. Which of the following is an advantage to using fiber optics data transmission?

A. resistance to data theft

B. fast data transmission rate

C. low noise level

D. All of these


Explanation

23. Which of the following is not a transmission medium?

A. telephone lines

B. coaxial cables

C. modem

D. microwave systems


Explanation

24. A technique for direct search is

A. Binary Search

B. Linear Search

C. Tree Search

D. Hashing


Explanation












25. Two main measures for the efficiency of an algorithm are

A. Processor and memory

B. Complexity and capacity

C. Time and Space

D. Data and Space


Explanation

26. The space factor when determining the efficiency of algorithm is measured by

A. Counting the maximum memory needed by the algorithm

B. Counting the minimum memory needed by the algorithm

C. Counting the average memory needed by the algorithm

D. Counting the maximum disk space needed by the algorithm


Explanation

27. The memory address of the first element of an array is called

A. floor address

B. foundation address

C. first address

D. base address


Explanation

28. The term "push" and "pop" is related to the

A. array










B. lists

C. stacks

D. all of these


Explanation

29. What does Router do in a network?

A. Forwards a packet to all outgoing links

B. Forwards a packet to the next free outgoing link

C. Determines on which outing link a packet is to be forwarded

D. Forwards a packet to all outgoing links except the original link


Explanation

30. Repeater operates in which layer of the OSI model?

A. Physical layer

B. Data link layer

C. Network layer

D. Transport layer


31. GIF images can have only upto...... colors

A. 128

B. 256

C. 512

D. 1024

View/Hide Correct Answer is b










Ans

Explanation

32. ......is stored on a client and contains state information of the website visited

A. Cookies

B. Servelet

C. History

D. Resident Page


Explanation

33......are small applications that are accessed on an internet server, transported over the internet, automatically installed and run as part of a web document.

A. Applets

B. Java Bean

C. Sockets

D. Java Component


Explanation

34.Encryption is the conversion of data in some intelligible format into an unintelligible format called.....to prevent the data from being understood if read by an unauthorized party.

A. Clear Text

B. Encrypted Text

C. Cipher Text

D. Coded Text












Explanation

35.The method for storing data temporarily such that the input-output of the same job is overlapped with its own processing, is known as

A. Spooling

B. Contention

C. I/O wait

D. Buffering


Explanation

36. Each cell in Microsoft Office Excel documents is referred to by its cell address, which is the......

A. cell�s column label

B. cell�s column label and worksheet tab name

C. cell�s row and column labels

D. cell�s row label


Explanation

37. The lowest form of computer language is called

A. BASIC

B. FORTRAN

C. Machine Language

D. COBOL


Explanation











38. The portion of the application that you work with in an application software package is the

A. user interface

B. utility interface

C. processing interface

D. analytical interface


Explanation

39. A.....provides access to features of the program.

A. menu bar

B. browser

C. Office Assistant

D. feature presentation


Explanation

40. Menus are a part of the

A. hardware

B. monitor

C. Status Bar

D. user interface


41. Which of the following is the term for a request for specific data contained in a database?

A. question

B. query









C. inquiry

D. quiz


Explanation

42. Windows 7 is an example of a(n)

A. application software

B. browser

C. Operating system

D. shareware


Explanation

43. The most powerful type of computer.

A. mainframe computers

B. microcomputers

C. minicomputers

D. supercomputers


Explanation

44. The system component that controls and manipulates data in order to produce information is called the

A. keyboard

B. microprocessor

C. monitor

D. mouse











Explanation

45. Which of the following is not an operating system for mobile phones?

A. Android

B. Symbian

C. iOS

D. All of these are OS for mobile phones


Explanation

46. This type of file is created by word processors.

A. worksheet

B. document

C. database

D. presentation


Explanation

47.Many experts are predicting that this revolution is expected to dramatically affect the way we communicate and use computer technology.

A. graphics

B. input

C. memory

D. wireless













Explanation

48.The Internet was launched in 1969 when the United States funded a project that developed a national computer network called

A. Web

B. ISP

C. CERN

D. ARPANET


Explanation

49. A(n)......program provides access to Web resources.

A. Web

B. ISP

C. browser

D. URL


Explanation

50. Rules for exchanging data between computers are called

A. programs

B. procedures

C. protocols

D. hyperlinks


51. The last part of the domain name following the dot(.) is the top........domain










A. Level

B. link

C. locator

D. language


Explanation

52. 51.Many individuals create their own personal sites called Web logs, or......

A. social networks

B. blogs

C. wikis

D. search engines


Explanation

53. Programs that automatically submit your search request to several search engines simultaneously are called ......

A. metasearch engines

B. inclusive search engines

C. spiders

D. hits


Explanation

54. .......cash is the Internet�s equivalent to traditional cash.

A. Universal

B. Web










C. Premium

D. Digital


Explanation

55. These programs allow parents as well as organizations to block out selected sites and set time limits on Internet access.

A. plug-ins

B. filters

C. FTP

D. DSL

View/Hide Ans

Explanation

56. ....are narrowly focused on specific disciplines and occupations.

A. Basic applications

B. Business suites

C. Specialized applications

D. Utility programs


DBMS

1. Usage of Preemption and Transaction Rollback prevents ______.

A. Unauthorised usage of data file

B. Deadlock situation

C. Data manipulation









D. File preemption


Explanation

2. Views are useful for _____ unwanted information, and for collecting together information from more than one relation into a single view.

A. Hiding

B. Deleting

C. Highlighting

D. All of the above


Explanation

3. The decision tree classifier is a widely used technique for ______.

A. Classification

B. Association

C. Partition

D. Clustering


Explanation

4. Cross_tab displays permit users to view ______ of multidimensional data at a time.

A. 1 − dimension

B. 2 − dimensions

C. 3 − dimensions

D. Multidimensions

View/Hide Correct Answer is B

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Ans

Explanation

5. Thoma’s-write rule is ______.

A. Two phase locking protocol

B. Timestamp ordering protocol

C. One phase locking protocol

D. Sliding window protocol


Explanation

6. Value that appears in one relation for a given set of attributes also appears for a certain set of attributes in another relation.

A. Logical Integrity

B. Referential Integrity

C. Domain Integrity

D. Data Integrity


Explanation

7.The SQL expression Select distinct T, branch_name from branch T, branch S where T.assets ‹ S.assets and S.branch_city= “Mumbai” finds the names of

A. All branches that have greater assets than some branch located in Mumbai.

B. All branches that have greater assets than all branches in Mumbai.

C. The branch that has greatest asset in Mumbai.

D. Any branch that has greater assets than any branch in Mumbai.












Explanation

8.

Consider the following schemas : Branch_Schema = (branch_name, assets, city) Customer_Schema = (cutstomer_name, street, city) Deposit_Schema = (branch_name, account_number, customer_name, balance) Borrow_Schema = (branch_name, loan_number, customer_name, amount) Which of the following tuple relational calculus finds all customers who have loan amount more than ` 12,000 ?

A. t(customer_name) | t∈borrow[?] t[amount]›12000}

B. {t |t(customer_name) | t∈borrow[?] t[amount]›12000}

C. {t |[?] ∈ borrow (t(customer_name=s(customer_ name))[?] [amount]›12000}

D. {t |[?] ∈ borrow (t(customer_name)[?] s[amount] ›12000}


Explanation

9.

Match the following :(a) Create (i) The E-R Model(b) Select (ii) Relationship Model(c) Rectangle (iii) DDL(d) Record (iv) DMLCodes :(a) (b) (c) (d)

A. (iii) (iv) (i) (ii)

B. (iv) (iii) (ii) (i)

C. (iv) (iii) (i) (ii)

D. (iii) (iv) (ii) (i)


Explanation

10. Which of the following is true ?

A. A relation in BCNF is always in 3NF

B. A relation in 3NF is always in BCNF

C. BCNF and 3NF are same








D. A relation in BCNF is not in 3NF


11.The User Work Area (UWA) is a set of Program variables declared in the host program to communicate the contents of individual records between

A. DBMS & the Host record

B. Host program and Host record

C. Host program and DBMS

D. Host program and Host language


Explanation

12.If a relation with a Schema R is decomposed into two relations R1 and R2 such that (R1 ∪ R2) = R1 then which one of the following is to be satisfied for a lossless joint decomposition (→ indicates functional dependency)

A. (R1 ∩ R2) → R1 or R1 ∩ R2 → R2

B. R1 ∩ R2 → R1

C. R1 ∩ R2 → R2

D. R1 ∩ R2 → R1 and R1 ∩ R2 → R2


Explanation

13. Which level of Abstraction describes how data are stored in the data base ?

A. Physical level

B. View level

C. Abstraction level

D. Logical level

http://www.brightways.org/ugc-net-gate-mcq-dbms.php?page=2#!









Explanation

14. Third normal form is based on the concept of ______.

A. Closure Dependency

B. Transitive Dependency

C. Normal Dependency

D. Functional Dependency


Explanation

15. Referential integrity is directly related to

A. Relation key

B. Foreign key

C. Primary key

D. Candidate key


Explanation

16. In multiuser database if two users wish to update the same record at the same time, they are prevented from doing so by

A. Jamming

B. Password

C. Documentation

D. Record lock


Explanation













17. B+ tree are preferred to binary tree in Database because

A. Disk capacity are greater than memory capacities

B. Disk access is much slower than memory access

C. Disk data transfer rates are much less than memory data transfer rate

D. Disks are more reliable than Memory


Explanation

18. A Transaction Manager is which of the following ?

A. Maintains a log of transactions

B. Maintains before and after database images

C. Maintains appropriate concurrency control

D. All of the above


Explanation

19. What is Granularity ?

A. The size of database

B. The size of data item

C. The size of record

D. The size of file


Explanation

20. Which level of Abstraction describes what data are stored in the Database ?

A. Physical level










B. View level

C. Abstraction level

D. Logical level


21.The problem that occurs when one transaction updates a database item and then the transaction fails for some reason is ________.

A. Temporary Select Problem

B. Temporary Modify Problem

C. Dirty Read Problem

D. None


Explanation

22. Consider a schema R(A, B, C, D) and functional dependencies A → B and C → D. Then the decomposition R1(A, B) and R2(C, D) is

A. Dependency preserving but not lossless join

B. Dependency preserving and lossless join

C. Lossless Join but not dependency preserving

D. Lossless Join


Explanation

23. If D1,D2, ....Dn are domains in a relational model, then the relation is a table, which is a subset of

A. D1+D2+... +Dn

B. D1ΧD2Χ ... ΧDn

C. D1∪D2∪... ∪Dn









D. D1−D2−...−Dn


Explanation

24. Which of the following is not a type of Database Management System ?

A. Hierarchical

B. Network

C. Relational

D. Sequential


Explanation

25. Manager&rsquos salary details are to be hidden from Employee Table. This Technique is called as

A. Conceptual level Datahiding

B. Physical level Datahiding

C. External level Datahiding

D. Logical level Datahiding


Explanation

26. A Network Schema

A. restricts to one to many relationship

B. permits many to many relationship

C. stores Data in a Database

D. stores Data in a Relation

View/Hide Correct Answer is B











Ans

Explanation

27. The relation “divides” on a set of positive integers is ________.

A. Symmetric and transitive

B. Anti symmetric and transitive

C. Symmetric only

D. Transitive only


Explanation

28. The “PROJECT” operator of a relational algebra creates a new table that has always

A. More columns than columns in original table

B. More rows than original table

C. Same number of rows as the original table

D. Same number of columns as the original table


Explanation

29.

The employee information of an Organization is stored in the relation : Employee (name, sex, salary, deptname) Consider the following SQL query Select deptname from Employee Where sex = ‘M’ group by deptname having avg (salary) > {select avg (salary) from Employee} Output of the given query corresponds to

A. Average salary of employee more than average salary of the organization.

B. Average salary less than average salary of the organization.

C. Average salary of employee equal to average salary of the organization

D. Average salary of male employees in a department is more than average salary of the organization










Explanation

30.For a database relation R(a, b, c, d) where the domains of a, b, c, d include only the atomic values. The functional dependency a → c, b → d holds in the following relation

A. In 1NF not in 2NF

B. In 2NF not in 3NF

C. In 3NF

D. In 1NF


31.Match the following : a.Foreign keys i.Domain constraint b.Private key ii.Referential integrity c.Event control action model iii.Encryption d.Data security iv. Trigger

A. a b c d iii ii i iv

B. a b c d ii i iv iii

C. a b c d iii iv i ii

D. a b c d i ii iii iv


Explanation

32. SQL command to delete a column from an existing table:

A. Alter table

B. Drop table

C. Delete table

D. Delete column


Explanation












33. With QBE, inserting records from one or more source tables into a single target table can be achieved by:

A. Append action query

B. Update action query

C. Insert action query

D. Make table action query


Explanation

34. Tuple in relational algebra refers to:

A. Row

B. Column

C. Table

D. Relation


Explanation

35. An attribute or set of attributes within one relation that matches the candidate key of some(possibly the same) relation:

A. Super Key

B. Candidate key

C. Primary key

D. Foreign key


Explanation

36. A subset of data in a data warehouse in the form of summary data, related to a particular department or business function:










A. Meta Data

B. Archive data

C. Data Marts

D. Operational Data Store


Explanation

37. The normalization of 1NF relations to 2NF involves:

A. Removal of partial dependencies

B. Removal of full dependencies

C. Removal of transitive dependencies

D. Removal of multi-valued dependencies


Explanation

38. Why do we go for Normalization of Data Bases?

A. To avoid the repetitions

B. To prevent fragmentation

C. Avoid redundancy

D. To prevent replication


Explanation

39. if a relation is in BCNF then it is in:

A. 2 NF

B. 3 NF

C. 1 NF










D. 1 NF and 2 NF


Explanation

40. A file is:

A. an abstract data type

B. logical storage unit

C. usually non volatile

D. volatile


41. What property of the files prevents sharing of files and directories?

A. Tree structure

B. One level structure

C. Two level structure

D. Length


Explanation

42. E-R modeling technique is:

A. Tree structure

B. Top-down method

C. Bottom-up method

D. Right-left approach


Explanation












43. Data items stored as grouped items is:

A. Record

B. List

C. Strings

D. Title list


Explanation

44. Data items are fragmented, replicated and propagated in:

A. DBMS

B. RDBMS

C. DDBMS

D. DML


Explanation

45. If every non-key attribute is functionally dependent on the primary key, then the relation will be in

A. 1NF

B. 2NF

C. 3NF

D. 4NF


Explanation

46. which of the following is record based logical model(s)?

A. Network Model










B. Object-oriented model

C. Relational Model

D. Entity Relationship Model

View/Hide Ans Correct Answer is a,c

Explanation

47. In an E-R diagram ellipses represents

A. Entity sets

B. relationship among entity sets

C. attributes

D. link in attributes & entity sets


Explanation

48. The set of permitted values for each attribute is called its

A. Attribute set

B. attribute range

C. domain

D. group


Explanation

49. Relations produced from an E-R model will always be in

A. 1NF

B. 2NF

C. 3NF

D. 4NF











Explanation

50. E-R modeling technique is a

A. Top-down approach

B. Bottom-up approach

C. Left-right approach

D. none of above


51. Redundancy is dangerous as it is a potential threat to data

A. Integrity

B. Consistency

C. Sufficiency

D. None

View/Hide Ans Correct Answer is a,b

Explanation

52. Who is more concerned about the conceptual level of the DBMS

A. DBA

B. The end user

C. The Systems programmer

D. Client


Explanation

53. An Attribute of one table matching the primary key of another table is called as












A. Foreign key

B. Secondary key

C. Candidate key

D. Composite


Explanation

54. If a relation is in BCNF, then it is also in

A. 1NF

B. 2NF

C. 3NF

D. all of above


Explanation

55. The way a particular application views the data from the database that the application uses is a

A. Module

B. Relational Model

C. Schema

D. Sub Schema


Explanation

56. Locking can be used for:

A. Deadlock

B. Lost Update










C. Uncommitted dependency

D. Inconsistent data

View/Hide Ans Correct Answer is bcd

Explanation

57. In relation Model Column is referred to as :

A. Tuple

B. Entity

C. Degree

D. Attribute


Explanation

58. ER Model Comes under

A. Physical data Model

B. Record based logical Model

C. Object based logical Model

D. All of above


Explanation

59.Which of the following is the problem of file management system? (a) Lack of data independence(b) Data redundancy(c) Update (d) all Periodically adding, changing, & Deleting file records is called file

A. Updating

B. Upgrading

C. Restructuring










D. Renewing


Explanation

60. Which of the following is a relational database

A. 4th Dimensions

B. FoxPro

C. dbase-IV

D. All of the above


61. The Index consists of :

A. A list of keys

B. Pointers to the master list

C. Both (a) & (b)

D. None of above


Explanation

62. Report generators are used to

A. Store data input by a user

B. retrieve information from files

C. Answer queries

D. Both (b) & (c)


Explanation












63. In a relational schema, each tuple is divided into fields called :

A. Relations

B. Domains

C. Queries

D. None of above


Explanation

64. The set of permitted values for each attribute is called its :

A. Attribute set

B. Attribute range

C. Domain

D. Group


Explanation

65. A DBMS consists of application programs called :

A. FORTRAN

B. AUTOFLOW

C. BPL

D. TOTAL


Explanation

66. A locked file can be :

A. Accessed by only one user

B. modified by user with correct password










C. is used to hide sensitive information

D. None


Explanation

67. Transaction X holds a shared lock R. if transaction Y requests for a shared lock on R :

A. result in deadlock situation

B. Immediately Granted

C. Immediately rejected

D. Granted as is released by X


Explanation

68. command used to select only one copy of each set of duplicable rows :

A. Select Distant

B. Select Unique

C. Select Different

D. None


Explanation

69. Which of following is the characteristics of a relational database model?

A. Tables

B. Treelike Structure

C. Complex logical relationship










D. records

View/Hide Ans Correct Answer is acd

Explanation

70. Which command is used to remove rows from a table?

A. Delete

B. Remove

C. Truncate

D. Both (a) & (b)


71. Which command is used to remove a table or index from the database in SQL?

A. Delete Table

B. Drop table

C. Erase Table

D. None of above


Explanation

72. A report generator is used to :

A. Update files

B. Print files on paper

C. Data Entry

D. None


Explanation












73. The modify operation is likely to be done after :

A. Delete

B. Look-up

C. Insert

D. None of above


Explanation

74. The database environment has all of the following components except :

A. Users

B. Separate files

C. Database

D. DBA


Explanation

75. If every non key attribute is functionally dependent on the primary key, then the relation will be in :

A. 1NF

B. 2NF

C. 3NF

D. 4NF


Explanation

76. Director�s Salary details are hidden from the employee, that is :

A. Conceptual level Hiding










B. Physical level data Hiding

C. External level data hiding

D. None of above


Explanation

77. Which of the following is record based logical model(s)?

A. Network Model

B. object oriented model

C. Relational Model

D. E-R Model

View/Hide Ans Correct Answer is ac

Explanation

78. The distinguishable parts of a record are called

A. Data

B. files

C. fields

D. All of above


Explanation

79. Embedded pointers provide

A. An inverted index

B. a secondary access path

C. a physical record key

D. all of above











Explanation

80. Which database handles full text data, image, audio and video?

A. Transaction database

B. Graphics database

C. Video on demand database

D. Multimedia database


81. A data dictionary does not provide information about

A. Where data is located

B. who owns it

C. size of disk storage device

D. How the data is used


Explanation

82. Data item characteristics that are important in data management include

A. Width

B. language

C. spelling

D. all of above


Explanation

83. A schema describes












A. Record & files

B. data elements

C. record relationships

D. all of the above


Explanation

84. Data security threat include

A. Privacy invasion

B. hardware failure

C. Fraudulent manipulation of data

D. all of above


Explanation

85. Which language is used by most of dbms�s for helping their users to access data?

A. 4GL

B. SQL

C. Query languages

D. HLL


Explanation

86. Which of the following is at highest level in the hierarchy of data organization?

A. Data Record

B. data File










C. Database

D. Data Bank


Explanation

87. The logical data structure with one to many relationship is a

A. Network

B. Tree

C. Chain

D. All of above


Explanation

88. An entry in a telephone book can be compared to a

A. Database

B. File

C. Record

D. Field











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