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This section of our 1000+ Object Oriented System Design MCQs focuses on Foundations of Object

Model 1!

1" The method of design encom#assing the #rocess of object oriented decom#osition and a notation

for de#icting both logical and #hysical and as $ell as static and dynamic models of the system

under design is %no$n as&

a" Object' Oriented (rogramming

b" Object' Oriented Design

c" Object' Oriented )nalysis

d" *one of the mentioned

ie$ )ns$er ,

-" .hat is the #rogramming style of the object oriented conce#tual model/

a" nariant relationshi#s

b" )lgorithms

c" Classes and objectsd" 2oals3 often e4#ressed in a #redicate calculus!

ie$ )ns$er C

5" The essential characteristics of an object that distinguish it from all other %inds of objects and

thus #roide cris#ly defined conce#tual boundaries3 relatie to the #ers#ectie of the ie$er is

called&

a" 6nca#sulation

b" Modularity

c" 7ierarchy

d" )bstraction

ie$ )ns$er D

8" )bstraction is classified into 9999999 ty#es

a" 8b" 5

c" -d" 1

ie$ )ns$er )

:" The #rocess of com#artmentali;ing the elements of an abstraction that constitute its structure andbehaior is called asa" 7ierarchy

b" 6nca#sulation

c" Modularityd" 6ntity )bstraction

ie$ )ns$er ,

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ie$ )ns$er C

=" n $hich of the follo$ing mechanisms3 ty#es of all ariables and e4#ressions are fi4ed at

com#ilation time!

a" Strong Ty#ing

b" .ea% Ty#ing

c" Static ,inding> early binding

d" Dynamic ,inding> late binding

ie$ )ns$er C

?" n $hich of the follo$ing mechanisms3 ty#es of all ariables and e4#ressions are not %no$n until

runtime

a" Strong Ty#ing

b" .ea% Ty#ing

c" Static ,inding> early binding

d" Dynamic ,inding> late bindingie$ )ns$er D

@" .hich of the follo$ing statements about (ersistence is correct/

a" t is the enforcement of the class of an object3 such that objects of different ty#es may not be

interchanged3 or at the most they may be interchanged only in ery restricted $ays!b" t is the #ro#erty of an object through $hich its e4istence transcends time and>or s#ace!

c" t is the #ro#erty that distinguishes an actie object from one that is not actie!d" )ll of the mentioned

ie$ )ns$er ,

10" .hat is that conce#t in ty#e theory in $hich a single name may denote objects of manydifferent classes that are related by some common su#er class referred to 999999

a" Monomor#hism

b" Ty#e Chec%ing

c" (olymor#hism

d" 2enerali;ation

ie$ )ns$er C

The fact that the same o#eration may a##ly to t$o or more classes is called $hat/

)! nheritance,! (olymor#hism

C! 6nca#sulation

D! Multi#le classification)ns & b

The fact that the same o#eration may a##ly to t$o or more classes is called $hat/

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)! nheritance

,! (olymor#hismC! 6nca#sulation

D! Multi#le classification

a

Multi#licity is the same as $hat conce#t for an 6AD/)!Aelationshi# ,! )ttribute

C! 6ntity D!Cardinality

d

Com#osition is a stronger form of $hich of the follo$ing/

)!)ggregation

,! 6nca#sulationC! nheritanceD!)ll of the aboe!

a

)n abstract class is $hich of the follo$ing/

)! ) class that has direct instances3 but $hose descendants may hae direct instances!,! ) class that has no direct instances3 but $hose descendants may hae direct instances!

C! ) class that has direct instances3 but $hose descendants may not hae direct instances!D! ) class that has no direct instances3 but $hose descendants may not hae direct instances

b

The term Com#lete for a BM has the same meaning as $hich of the follo$ing for an 66A

diagram/

)!Oerla##ing rule,! Disjoint rule

C! Total s#eciali;ation rule

D!(artial s#eciali;ation rulec

) BM diagram includes $hich of the follo$ing/

)! Class name,! ist of attributes

C! ist of o#erations

D! )ll of the aboe!d

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)n object can hae $hich of the follo$ing multi#licities/

)! ero,! One

C! More than one

D! )ll of the aboe! d

.hich of the follo$ing statement is true concerning objects and>or classes/

)! )n object is an instance of a class!,! ) class is an instance of an object!

C! )n object includes enca#sulates only data!D! ) class includes enca#sulates only data!

)

.hich of the follo$ing a##lies to a class rather than an object/

)!Query ,! B#date

C! Sco#e D!Constructor c

The benefits of object'oriented modeling are $hich of the follo$ing/

)! The ability to tac%le more challenging #roblems,! Aeusability of analysis3 design3 and #rogramming results

C! m#roed communication bet$een users3 analysts3 etc!

D! )ll of the aboe!D

The term ncom#lete for a BM has the same meaning as $hich of the follo$ing for an 66Adiagram/

)!Oerla##ing rule

,! Disjoint ruleC! Total s#eciali;ation rule

D!(artial s#eciali;ation rule & D

) constructor o#eration does $hich of the follo$ing/

)!Creates a ne$ instance of a class,! B#dates an e4isting instance of a class

C! Deletes and e4isting instance of a classD!)ll of the aboe!

)

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.hich of the follo$ing is a techniEue for hiding the internal im#lementation details of an object/

)! 6nca#sulation,! (olymor#hism

C! nheritanceD! )ll of the aboe

)

)ggregation is $hich of the follo$ing/

)! 64#resses a #art'of relationshi# and is a stronger form of an association relationshi#!,! 64#resses a #art'of relationshi# and is a $ea%er form of an association relationshi#!

C! 64#resses an is'a relationshi# and is a stronger form of an association relationshi#!

D! 64#resses an is'a relationshi# and is a $ea%er form of an association relationshi#!

)

.hich of the

follo$ing is not agood reason for

constructing a

reEuirementsmodel/

A) t can shothe busine

situation i

enough deto chec% t

thereEuireme

hae been

ca#tured fand corre

B) t candemonstr

that all th

use caseshae been

dra$n usithe correc

notation!C) t can be

organi;ed

such a $a

that it $illuseful late

for design

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the soft$

-

.hich of the follo$ing statements best describes $hat a class diagram can include/A) Only clas

B) Only clasand their

relationshC) Classes3

instances

theirrelationsh

5 .hich is the correct name for a #ossible set of classes3 together $ith an understanding of ho$ thos

classes might interact to delier the functionality of a use case/A) ) use cas

classdiagram!

B) ) reali;atiC) )

collaborat

8

.hat is the significance of the de#endency arro$ in this diagram/

t sho$s thatelements

$ithin the

collaborationGthe dotted

elli#se" mayreference

elements

$ithin theuse case Gthe

solid

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elli#se"!

One of thefollo$ing is not a

difference bet$een

a class diagramand a collaboration

diagram! .hichone/

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.hich of these figures is a collaboration diagram/

10

.hat is the significance of the double colon in the class name& Bser nterface&&)dd)dertB/

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LIST OF ATTEMPTED QUESTIONS AND ANSWERS

Multiple Choice Single Answe

Question! The key feature that enables users/application to cooperate and

collaborate in

application processing is named as :-

Coect Answe! Concurrency

"ou Answe! Collaboration

Multiple Choice Multiple Answe

Question! In designing classes, we are improving and enriching the class

content in

terms of properties and we screen them for :-

Coect Answe! Local and communication association , liminating

unnecessary

association , Identifying the relationship, top-down or bottom up, aggregation

and

declaring relationship pattern!

"ou Answe! Local and communication association , liminating unnecessary

association , Identifying the relationship, top-down or bottom up, aggregation

and

declaring relationship pattern!

Tue#F$lse

Question! "ore use classes may not necessarily bring better understanding or

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more

clarity!

Coect Answe! #alse

"ou Answe! #alse

Select The %l$n&

Question! $$$$$$$$helps to integrate homogeneous database system with

multiple

database and data types other than relational data types!

Coect Answe! "%&'

"ou Answe! ((%&"'

Tue#F$lse

Question! ) state chart diagram shows method of e*ecution on receipt of

message and

activities used in the method!

Coect Answe! True

"ou Answe! True

Tue#F$lse

Question! The registration form is +lled for each member of family under one

address

Coect Answe! True

"ou Answe! True

Select The %l$n&

Question! e e*tensively use $$$$$$$$ for processing, re+ning and designing

classes!

Coect Answe! "L

"ou Answe! "L

Select The %l$n&

Question! The user must have access to both ((%& and .%& to manipulate

data! The

developer therefore must develop applications that could source data from

$$$$$$$$

databases ((%&, .%& etc0 !

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Coect Answe! )ll

"ou Answe! )ny two

Tue#F$lse

Question! hen the system is modeled into di1erent case scenarios it not

only goes

down to a level of function and features, but also reveals relationships and

behaviours

amongst di1erent system components!

Coect Answe! True

"ou Answe! True


Question! The concept of ((2' was +rst introduced in

Coect Answe! 'imula Language

"ou Answe! 'imula Language

Tue#F$lse

Question! ith its strength, (%&C has become an industry standard for

interoperatability on di1erent databases!

Coect Answe! True

"ou Answe! True


Question! The following are the columns to be +lled in %3% reservation slip :-

Coect Answe! 4ame title 0 , %3% I% , .e5uired date

"ou Answe! 4ame title 0 , %3% I% , .e5uired date

Select The %l$n&

Question! The row of table in .%&"' contains data which maps $$$$$$$$ of

class in

((%&"'!

Coect Answe! Instance

"ou Answe! Instance


Question! The se5uence of states that the ob6ect goes through when it

receives a message

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to act is shown by the diagram called :-

Coect Answe! 'tate chart diagram

"ou Answe! 'e5uence diagram

Tue#F$lse

Question! "apping of multiple inheritance into a single table is possible in

.%&"'!

Coect Answe! True

"ou Answe! True


Question! )ll ((%&"' products namely (7, (b6ectivity, (b6ect 'tore and

3ersant

support following %&"' criteria :-

Coect Answe! ser de+ned datatype , Is$a relationship , 2art$of

relationship

"ou Answe! ser de+ned datatype , Is$a relationship , 2art$of relationship


Question! 8ow big is a class ob6ect9

Coect Answe! Is as big as sum of the sies of its member variables

"ou Answe! )s big as superclass


Question! In ((')%, the ob6ect is the unit used for analysis of the system,

hence it is

called:-

Coect Answe! (() (b6ect (riented )nalysis 0

"ou Answe! (() (b6ect (riented )nalysis 0

Select The %l$n&

Question! $$$$$$$$ of an ob6ect remains unchanged even though its state and

properties

change!

Coect Answe! Identity

"ou Answe! Identity


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Question! If %og derives from "ammal, and "ammal derives from )nimal,

then ;

Coect Answe! %og inherits )nimalmenthods

"ou Answe! ob6ect=data>menthods


Question! In conte*t of transactions, ((%&"' :-

Coect Answe! 8andle nested transactions , 'upports ".( , 'upports

long

transactions

"ou Answe! 8andle nested transactions , 'upports ".( , 'upports long

transactions


Question! The lock that ensures that no other transaction is commited till the

transaction

is in the mode of updation and creation of new version of ob6ect, is called

Coect Answe! rite Lock

"ou Answe! rite Lock

M$tch The Following

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?uestion Coect Answe! @our )nswer

Class 'hape Triangle, rectangle, circle, ellipse Triangle, rectangle, circle, ellipse

Class 3ehicle 'cooter, car, truck, tractor 'cooter, car, truck, tractor

Class )nimal Cat, dog, cow, tiger Cat, dog, cow, tiger

Class Color .ed, yellow, blue, green .ed, yellow, blue, green


Question! 3arious database packages are :-

Coect Answe! 'ibase , ')2 , (racle

"ou Answe! (racle , 'ibase

Select The %l$n&

Question! hen you e*press user-system interaction, the scenario in the

model is called

$$$$$$$$

Coect Answe! Case model

"ou Answe! ((2' model


Question! In %)%, the domain-speci+c A organisation-speci+c terms are

covered under

the title :-

Coect Answe! #eatures

"ou Answe! #eatures


Question! In the railway transport environment, the same train train name,

number etc 0leave everyday from one station to the other! &ut in their operations, dates,

drivers,

passengers etc di1er every day! This pattern is called :-

Coect Answe! )bstraction-(ccurrence 2attern

"ou Answe! )bstraction-(ccurrence 2attern

Select The %l$n&

Question! ) class is the$$$$$$$$ for an ob6ect!

Coect Answe! Template

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"ou Answe! Instance

Tue#F$lse

Question! The principle of polymorphism helps to e*tend and modify the

system scope

through appropriate messaging mechanism!

Coect Answe! True

"ou Answe! True


Question! )ccess to other ((%&"' comprises of :-

Coect Answe! .ead data resident in other ((%& , "odify data resident in

other

((%& , .ead data resident on .%&"'

"ou Answe! .ead data resident in other ((%& , "odify data resident in

other ((%&

Tue#F$lse

Question! The I should be designed for blind and mechanical operation!

Coect Answe! True

"ou Answe! #alse


Question! The main function will have following contents in C>>

Coect Answe! 4ame of class followed by name of ob6ect , 4ame of ob6ect

and

method separated by dot operator! , 3ariable declaration

"ou Answe! 4ame of class followed by name of ob6ect , 4ame of ob6ect and

method

separated by dot operator! , 8eader +les


Question! The method for industrial development of software based on use-

case-driven

design is

Coect Answe! ((' (b6ect (riented 'oftware ngineering 0

"ou Answe! ((% (b6ect (riented %esign 0

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Question! ((%&"' standards comprise of :-

Coect Answe! (%L , (?L , (%"B C>> binding

"ou Answe! (%L , (?L


Question! The main di1erence between structure and class is

Coect Answe! 'tructure does not support ((2' Class 'upports ((2'!

"ou Answe! 'tructure comprises of dissimilar datatypes! Class comprises of

similar

datatypes!


Question! The class and its hierarchy build through inheritance should lead to

a :-

Coect Answe! 'ingle purpose class

"ou Answe! 'uper class


Question! ) +rst step in design is to construct a static "L class diagram

consisting of:-

Coect Answe! Class name , )ttributes , "ethods

"ou Answe! Class name , )ttributes , "ethods

Tue#F$lse

Question! 'e5uence diagrams and collaboration diagrams are very dicult to

select

classes and ob6ects!

Coect Answe! #alse

"ou Answe! #alse


Question! The solution to simplicity of design lies in the following factors :-

Coect Answe! Class design , &uilding hierarchy , Brouping classes in

aggregate sets

that have similar characteristics!

"ou Answe! Class design , &uilding hierarchy , Brouping classes in

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aggregate sets that

have similar characteristics!


Question! The purpose of declaring Dprivate< is :-

Coect Answe! %ata hiding from accidental changes

"ou Answe! (perator overloading

Select The %l$n&

Question! Invoice and $$$$$$$$ are two classes in the noun phrase approach

!&ut

)mount is an attribute in invoice, hence should be re6ected for class

consideration!

Coect Answe! )mount

"ou Answe! )mount

M$tch The Following

?uestion Coect Answe! @our )nswer

'tandard procedure "ethod "ethod

Table 'cheme representing comple* relationships between entities 'cheme

representing comple* relationships between entities

Column .efers datatype and name .efers datatype and name

.ow .efers data for single entry .efers data for single entry


Question! In .ailway .eservation and Ticketing system, we can call following

parameters as attributes of class 2assenger :-

Coect Answe! 4ame , )ge , 'e*

"ou Answe! 4ame , )ge , 'e*


Question! In %)%, the information providers such as users, customers,

vendors and

stakeholders paly a role of

Coect Answe! 2articipants

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