st. xavier’s schools-chandigarh, panchkula, mohali, … · 2020. 8. 27. · ***point to remember...
TRANSCRIPT
ST. XAVIER’S SCHOOLS-CHANDIGARH, PANCHKULA, MOHALI, ZIRAKPUR
CLASS-VIII ENGLISH WORKSHEET 7
TOPIC-PAST TENSE (.....continuation)
3.
The past perfect tense is used:-
-to describe an action that was completed before another action took place
Ex. The girls had slept before grandma returned from the market.
-as the past form of the present perfect ,especially in indirect speech
Ex. Rita said, “I have prepared pudding.”(direct speech)
Rita said that she had prepared pudding. (indirect speech)
-to report a completed action in the past
Ex. Ajay told me that he had won a prize.
SECTIONAL RECAPITULATION
Exercise1 Fill in the blanks with verbs in the past perfect tense:-
1. The explorers ___ a new island years ago. (discover)
2. I _____ to my father about the excursion trip. (speak)
3. Sagarika _____ the house when I reached her place. (leave)
4. My mother ______ dinner when my father reached home. (cook)
5. Diya _____ the report card to her mother yesterday. (give)
4.
The past perfect continuous tense is used:
-to show an action that had been going on before another past action
Ex. The girl had been trying to make the model of a volcano before the teacher helped her.
-to show an action that was recently completed
Ex. Tendulkar had been playing for two hours before he was run out.
AFFIRMATIVE S+had+V3+O.
NEGATIVE S+had+not+V3+O.
INTERROGATIVE Had+S+V3+O?
NEGATIVE INTERROGATIVE Had+S+not+V3+O?
AFFIRMATIVE S+had+been+V1+ing+O.
NEGATIVE S+had+not+been+V1+ing+O.
INTERROGATIVE Had+S+been+V1+ing+O?
NEGATIVE
INTERROGATIVE
Had +S+not+been+V1+ing+O?
FORMULAS OF PAST PERFECT TENSE IN DIFFERENT KINDS OF
SENTENCES
FORMULAS OF PAST PERFECT CONTINUOUS TENSE IN DIFFERENT
KINDS OF SENTENCES
S+had+V3+O
PAST PERFECT TENSE
S+had+been+V1+ing+O
PAST PERFECT CONTINUOUS/PROGRESSIVE TENSE
SECTIONAL RECAPITULATION
Exercise 2 Fill in the blanks with Past perfect continuous tense:-
1. She ____ all the people before she contested the election. (meet)
2. The water ______ for thirty minutes before I turned off the gas. (boil)
3. The girl ______ kites since childhood. (fly)
4. The mountaineer _______ to climb the mountain since last year. (try)
5. He ______ for an hour. (play)
***Point to remember
Used to – is often used with verb forms in the past tense to suggest that some action happened for a
particular period in the past but stopped later.
Ex. 1. She used to bake delicious cakes in those days.
2. He used to drive down to office earlier.
Positive/affirmative statements - a) I used to exercise everyday earlier.
b) She used to live in this house long back.
Negative statements - a) She never used to go to the gym.
b) He never used to watch cricket matches.
Interrogative statement – a) Did he used to eat porridge every evening?
RECAP OF FORMULAS OF PAST TENSE
FORMS OF PAST TENSE FORMULAS EXAMPLES
Simple S+V2+O. Fatima covered her
notebook.
Continuous S+was/were+V1+ing+O. Fatima was covering her
notebook.
Perfect S+had+V3+O. Fatima had covered her
notebook.
Perfect Continuous S+had+been+V1+ing+O. Fatima had been covering
her notebook.
FINAL RECAPITULATION
Exercise 3 Fill in the blanks with appropriate verbs in various forms of past tense as mentioned in
brackets:-
1. The children came out of the library and _____ in an adjoining room. (settle) (simple past)
2. Raghav _____ some saplings which he would plant with his friends. (buy) (past perfect)
3. Sameera ______ to participate in the event too. (prepare) (past continuous)
4. The teacher ______ a meeting and ______ the plans for the Environment Day. (hold), (discuss)
(simple past)
5. Paper bags were also ready as they _____ them for the past two weeks for distribution among the
local residents. (make) (past perfect continuous tense)
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ANSWER KEY OF WORKSHEET 6
Exercise 1 1. ate 2. did not leave 3. went 4. waited, came 5. entered
Exercise 2 1. was listening 2. were sleeping 3. was watching 4. was solving 5. were walking
Exercise 3 a) 1. Past continuous tense 2. Simple past tense 3. Past continuous tense,negative
Exercise 3 b) 1. The children were not writing articles for the school magazine yesterday. 2. My
neighbours were not shifting to Mumbai when I tried to contact them. 3. Were they planning to go
out yesterday? 4. Did they pledge to save the environment? 5. Was Rohan not planning to
participate whole heartedly in the event?
The answer key of Worksheet -7 will be attached with Worksheet -8
SANSKRIT WORKSHEET-5 CLASS-8
CLASS – 8 S.St. Worksheet- 7 (History/Civics)
Lesson : 4 - India in the Eighteenth Century
Part – 2 (Summary)
Important Regional Powers of the Eighteenth Century
The Marathas:
Shivaji united the Marathas politically. Under him, the Marathas put up a strong resistance
against Mughal expansion in the Deccan. Shivaji died in 1680. Shivaji’s sons Shambhaji
and Rajaram died fighting the Mughals. The Mughals captured Shambhji’s son Shahu.
Rajaram’s widow Tara Bai ruled the Marathas from Kohlapur on behalf of her minor son
Shivaji III.
Rise of Peshwas
Bhadur Shah I, who succeeded Aurangzeb in 1707, released Shahu. This resulted in a civil
war over the Maratha throne between Shahu and Shivaji III. Shahu emerged more
powerful with the help of Balaji Vishwanath, a shrewd revenue officer. While Shahu
eatablished his capital at Satara, Shivaji III established his capital at Kohlapur. Constant
warfare between Satara and Kohlapur kept Shahu totally preoccupied. He grew
increasingly dependent on Balaji Vishwanath, whom he made his peshwa, or chief
minister. Gradually, the peshwa became the real ruler of the Marathas.
Balaji Vishwanath secured Mughal recognition for Shahu as the rightful ruler of the
Marathas. Baji Rao I made peace between Satara and Kohlapur. Maratha chiefs like
Sindhia of Gwalior, Bhonsle of Nagpur, Gaekwad of Baroda and Holkar of Indore
extended Maratha control up to the outskirts of Delhi by 1737.
(PESHWA BAJI RAO I)
The Maratha kingdom expanded under Baji Rao I. However, this expansion was mainly carried
out by the personal armies of the Maratha chiefs and not by the peshwa’s troops. By 1737,
Maratha influence extended over Malwa, Gujarat,Bundelkhand and the outskirts of Delhi. Some
of chiefs like Sindhia in Gwalior,Bhonsle in Nagpur, Gaekwad in Baroda and Holkar in Indore
became almost independent of the peshwa’s control. .Baji Rao I captured Salsette and Bassein on
the Konkan Coast from the Portuguese.
In 1757, the Marathas helped the Mughal Emperor by removing the agent posted in Delhi
by Ahmad Shah Abdali. In 1758, they took Sirhind and Lahore from the Afghans. All this
made ba war between Marathas and the Afghans inevitable.
THIRD BATTLE OF PANIPAT(1761):
Ahmad Shah Abdali entered into alliance with the enemies of the Marathas, mainly the
rulers of Rohilkhand and Awadh. Balaji Baji Rao sent an army, which met Abdali’s forces
on the battlefield of Panipat in 1761. Ahmad Shah Abdali easily defeated the Marathas.
Unable to bear the shock of defeat, Balaji Baji Rao died the same year.
(AHMAD SHAH ABDALI)
CAUSES OF MARATHA FAILURE:
The Marathas did not receive any local support. They had made enemies of the local
powers by raiding their territories and had made no effort to win over their loyalty. As a
result, the Maratha army was desperately short of supplies on the eve of the war. The
Marathas also made the mistake of not adopting modern military techniques and weapons.
Besides, they were weakened by infighting among their chiefs.
EVENTS AFTER 1761:
The defeat at Panipat ruined the possibility of the Marathas replacing the Mughals as an
all- India power. This allowed the English East India Company to become a political force
in India. After Madhav Rao I, the peshwa’s power declined.
Mysore:
In Mysore, Hyder Ali, who rose from the position of a mere soldier, took over the
government in 1761. He made Mysore state powerful enough to challenge the British.
(HYDER ALI)
The Sikhs:
In Punjab, the Sikhs rose to prominence towards the end of the eighteenth century. Ranjit
Singh united all the Siks living west of the Satluj and raised army.
(RANJIT SINGH)
EXERCISE:
1) Short Questions:
a) Why was there a civil war among the Marathas?
b) What role did the Maratha chiefs play in territorial expansion?
c) Name some Maratha chiefs who became almost independent of the peshwa’s control.
2) Long questions:
a) The Marathas became a major political force under the peshwas. In this context, answer
the following questions:
i) How did the the peshwa gradually become the real ruler of the Marathas?
ii) Give an account of Maratha expansion under Baji Rao I.
b) Narrate the events that led to the Third Battle of Pnipat. Why did the Maratha fail in the
battle?
Answer key of S.ST Worksheet- 6 (GEOGRAPHY)
EXERCISE
I – Answer the following questions in brief -
Q1- Define migration.
Ans - Migration denotes any movement by human beings between one geographical region to
another with an aim to settle definitely or temporarily.
Q2 –What is international migration?
Ans - Movement of population from one country to another across the international borders is
called international migration.
Q3- What is the difference between immigration and emigration?
Ans -
Immigration
It is the action of coming to
live permanently in a foreign
country and the person who
indulges in immigration is
called an immigrant.
Emigration
It is the act of leaving
one’s own country to settle
permanently in another
country and the person who
indulges in emigration is
called an emigrant.
Q4- Define Brain drain.
Ans - Brain drain is the migration of skilled human resource for trade, education and better
opportunities etc.
II-Fill in the blanks –
a) The phenomenon of urbanization began in Britain_.
b) Migration of skilled human resources to other countries is termed as brain drain.
c) If you migrate to another country, you will be an immigrant_ and if your friend decides to
migrate to India, he will be an emigrant.
CLASS : VIII SCIENCE WORKSHEET-7(PHYSICS)
TOPIC : MATTER
EVAPORATION :
Evaporation is a process by which a liquid changes into vapour. The change of state from liquid
to vapour at all temperatures from the surface of a liquid is called evaporation.
Difference between evaporation and vaporization :
Explanation of Evaporation by Molecular Model :
In a liquid, the molecules are in motion within its boundary. They collide with each other.
During the collision, some molecules below the surface of liquid acquire sufficient kinetic
energy to overcome the force of attraction of other molecules and their inter-molecular
spacing increases.
Such molecules move to the surface of liquid and they absorb heat from the surrounding so
as to escape out into the atmosphere with the atmospheric air molecules. This process is
called evaporation.
Factors affecting the rate of evaporation :
1) Temperature of liquid : The rate of evaporation depends on the temperature of the liquid. The
rate of evaporation is higher if the temperature of liquid is high.
Example: A wet clothes dries up on a hot day much faster than on a cold day.
2) The area of the exposed surface : The rate of evaporation increases if area of surface exposed
increases.
Example: We often pour tea in a saucer to cool it faster.
3) The nature of liquid: Liquids with low melting point evaporate faster than the liquids having
high melting point.
Example: Alcohol evaporates faster than water when poured on palm.
4) The flow of air : The rate of evaporation increases with increase in amount of air blowing
above the liquid.
More the temperature of a liquid,
more will be the kinetic energy of
molecules , higher will be the
number of molecules escaping from
its surface.
In a volatile liquid, the force of
attraction among molecules is
negligible. Thus, a very small amount of
energy is required to overcome these
forces of attraction. So they escape out
more easily.
More the area of exposed surface,
more will be the no of molecules
escaping out of the surface. As
evaporation occurs among the
molecules on the surface, not in the
interior.
Example : Blowing on hot food cool it faster.
5) Humidity: The rate of evaporation increases with decrease in humidity.
Example: Wet clothes dry faster in dry summer days than in rainy season..
How does evaporation cause cooling ?
When a liquid changes into vapour, it requires heat. This heat is supplied by the surroundings of
the liquid that results in fall in the temperature (or cooling) in the surroundings.
Applications of evaporation
1) In summer, water gets cooled in an earthen pot.
2) Evaporation of sweat from our body helps to
maintain body temperature at 37OC.
Water from earthen pot seeps out
on the surface through the pores in
the pot and it evaporates.
The heat required for evaporation
is taken from water inside the pot
which therefore gets cooled.
When the sweat evaporates, it
require heat which it takes away
from our body.
As a result, temperature falls to
keep the body at 37OC.
In humid air, the water molecules
present in the air near the surface of
the liquid do not allow the molecules of
the liquid to escape out easily. They
decrease the rate of evaporation.
On blowing air, the air molecules take
away the liquid molecules from the
surface with them and other molecules of
the liquid occupy their place. This
increases the rate of evaporation.
3) Evaporation of water from wet cloth on the forehead of a patient having fever helps in reducing
fever.
4) A hot cup of tea cools down after sometime due to evaporation.
SUBLIMATION AND DEPOSITION:
Sublimation is the process by which a solid when heated, directly changes into its vapour
without first changing into liquid.
Reverse process for sublimation is solidification or deposition.
Deposition is a process when a vapour (or gas) on cooling changes directly into a solid
without first changing into liquid.
Example: When ammonium chloride, solid carbon dioxide are heated, they directly
change into their vapours and when their vapours are cooled, they change into their solids.
Application of sublimation process: It is used in purification of many sublime substances such
as iodine, camphor, naphthalene, benzoic acid, ammonium chloride.
Experiment:
1. Take a china dish and put mixture of ammonium chloride and sodium chloride into
it.
2. Take a funnel and block its nozzle with a cotton plug and invert it on the china dish.
3. Heat the mixture with a burner gently till white fumes are produced.
Water of the strips evaporates.
During evaporation, water takes
heat from the body of patient .
The body temperature of patient
decreases.
Heat loss happens as the water
evaporates resulting in the cooling
down of the tea.
Observation: On heating, fumes are formed due to sublimation of ammonium
chloride. Its gets condensed and deposits along the cooler part of funnel, i.e., narrow end.
Common salt is left behind in the china dish whereas ammonium chloride can be scraped off from
the neck of the funnel.
Conclusion: Ammonium chloride can be separated from its mixture with common salt by the
process of sublimation.
Questions:
1) Give reasons for the following:
a) Volatile liquids such as alcohol and spirit are stored in tightly closed bottles.
b) Water in a dish evaporates faster than in a bottle.
2) State true or false
a) Evaporation of a liquid causes cooling.
b) Evaporation takes place at a specific constant temperature.
c) Evaporation takes place through out the mass of liquid.
3) Why does the size of naphthalene balls decrease when left open?
4) Give two examples of each:
a) sublime substance.
b) volatile liquid.
5) Explain why in hot summer days water remains cool in earthen pots.
6) Define the following and write one application of each:
a) sublimation
b) evaporation
7) What is the effect of humidity on evaporation?
8) Why is cooling produced on evaporation of a liquid?
Answer Key of Science Worksheet- 6 (Biology)
Q1.What do you mean by ascent of sap?
Ans: The sap which is mixture of water and dissolved minerals , moves in an upward direction
against the gravity to reach the leaves of the plant. This upward movement of sap ( from the root
to the crown ) is called ascent of sap.
2. Write about the forces that contribute in ascent of sap.
Ans: The forces that are responsible for ascent of sap are:
a) Cohesion: It is the mutual attraction between water molecules.
b) Adhesion: It involves attraction of water molecules to the surface ( Surface of elements of
xylem )
3. What is transpiration?
Ans: Loss of water from the arieal parts of plant in the form of water vapour is known as
transpiration.
4. Describe the types of transpiration.
Ans: Based on the region from which transpiration is taking place , it can be of following types:
a) Lenticular transpiration: Lenticels are small openings in the bark when water is lost
through the lenticels, it is called Lenticular transpiration.
b) Cuticular transpiration: Cuticle is the multilayered waxy deposit that generally covers
the leaves of the plants. When water is lost through cuticle , it is called Cuticular
transpiration.
c) Stomatal Transpiration: Stomata are minute pores present on the leaves when water is
lost through stomata, it is called stomatal transpiration.
5. What is the function of stomata and where is it found?
Ans: Stomata helps in diffusion of gases like carbon dioxide and oxygen and also helps in the
process of transpiration. Stomata are found on the leaves of plants. ************************************
SUBJECT – MATHS CLASS – VIII WORKSHEET – 7
(CUBES AND CUBE ROOTS)
INTRODUCTION: Cube of a number is the product of the number by itself three times
CUBE NUMBERS OR PERFECT CUBES
Natural Numbers Cubes
1 1 ×1×1 = 1
2 2×2×2 = 8
3 3×3×3=27
4 4×4×4=64
5 5×5×5=125
6 6×6×6 = 216
7 7×7×7 = 343
8 8×8×8 = 512
9 9×9×9 = 729
10 10×10×10 =1000
So, we can see that 1, 8, 27, 64, 125,…….are the natural numbers which are the cubes of natural
numbers. Such numbers are called Cube Numbers or Perfect Cubes. So you can see that the Cubes
of natural numbers are called cube numbers or perfect cubes.
NOTE: All Natural Numbers are not perfect Cubes.
To understand this concept better, observe the following example:
(i) Let us consider a cube number 64 and it can be expressed as
64 = 2 × 2 × 2 × 2 × 2 ×2
Observation: 64 can be expressed as the product of triplets of equal prime factors.
Therefore it is a perfect cube number.
(ii) Now consider a non-cube number 192 and it can be expressed as:
192 = 2 × 2 × 2 × 2 × 2 ×2 × 3
Observation: 192 cannot be expressed as the product of triplets of equal prime factors. Therefore it is
not a perfect cube number.
NOTE: A perfect cube can always be expressed as the product of triplets of equal prime factors
Example 1: Is 243 a perfect cube?
Solution: The number 243 can be expressed as:
243 = (3× 3 × 3) × 3 × 3
Since, 3 × 3 left after grouping other 3’s in triplets.
Therefore, 243 cannot be expressed as the product of triplets of equal prime factors.
Hence, 243 is a not a perfect cube.
Example 2: Is 2744 a perfect cube?
Solution: The number 2744 can be expressed as:
2744 = (2× 2 × 2) × (7 × 7 × 7)
Since, 2744 can be expressed as the product of triplets of equal prime factors.
Hence, 2744 is a perfect cube.
Example3: Is 675 is a perfect cube. IF not, find the smallest natural number by which 675 should be
multiplied so that product is a perfect cube.
Solution: The number 675 can be expressed as:
675 = (5× 5) × (3 × 3 × 3)
Since, (5× 5) is left after grouping in triplets,
Therefore, 675 is a not a perfect cube
To make it a perfect cube, 5 should also occur in a group of three, so we need one more 5. In
that case,
675 × 5 = (5 × 5 × 5) × (3 × 3 × 3) = 3375, which is a perfect cube.
Hence, the smallest natural number by which 675 must be multiplied so that product is a
perfect cube is 5.
Example 4: Find the smallest natural number by which 18252 should be multiplied to make it a
perfect cube. Also find the cube root of the product.
Solution: The number 18252 can be expressed as:
18252 = (2× 2) × (3 × 3 × 3) × (13 × 13)
In this case, prime factor 3 occurs thrice while prime factors 2 and 13 occur twice. Therefore,
the smallest natural number by which the given number must be multiplied so that the product
is a perfect cube is 2 × 13 i.e. 26
Then product, 18252 × 2 × 13 = (2× 2 × 2) × (3 × 3 × 3) × (13 × 13× 13)
i.e. 474552 = 23 × 33 × 133
The cube root of the product = 2 × 3 × 13 = 78
PROPERTIES OF CUBES OF NATURAL NUMBERS
PROPERTY 1: Cubes of odd numbers are odd and cubes of even numbers are even.
PROPERTY 2:
(i) If a number has 1, 4, 5, 6 or 9 in the unit place, then its cube also ends with the same
digits i.e. 1, 4, 5, 6 or 9
(ii) If a number has 2 in the unit’s place, then its cube ends in 8.
(iii) If a number has 8 in the unit’s place, then its cube ends in 2.
(iv) If a number has 3 in the unit’s place, then its cube ends in 7.
(v) If a number has 7 in the unit’s place, then its cube ends in 3.
(vi) If a number has 0 in the unit’s place, then its cube ends in 0.
PROPERTY 3: Cube of a negative integer is always negative.
SOME PRACTICE QUESTIONS
1. Which of the following numbers are not perfect cubes? Give reasons in support of your
answer: (i) 648 (ii) 8640 (iii) 8000
2. Show that each of the following numbers is a perfect cube. Also find the number whose cube
is the given number: (i) 5832 (ii) 74088 (iii) 15625
3. Find the smallest number by which each of the following number must be multiplied to obtain
a perfect cube: (i) 11979 (ii) 19652 (iii) 5184
4. Find the cubes of the following numbers: (i) -17 (ii) -39
4
5. Which of the following are cubes of even natural numbers or odd natural numbers:
(i) 512 (ii) 2197 (iii) 6859 (iv) 216
6. Write the one’s digit of the cube of each of the following numbers:
(i) 358 (ii) 725 (iii) 987 (iv) 893
ANSWER KEY OF MATHS WORKSHEET - 6
1) (i) 21 (ii) 66 (iii) 94 (iv) 46
1 (v) 1.4 (vi) 0.08
2) Length = 88 m, breadth = 22m
3) (i) 49 (ii) 409 (iii) 462 (iv) 39
29 (v) 1
12
1
4) 22 , 330
5) (i) 64; 1936 = 44 (ii) 98; 8836 = 94 (iii) 205; 10816 = 109
6) 39
7) 65 , 65
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COMPUTER APPLICATIONS WORKSHEET-6 CLASS-8
CHAPTER- OPERATING SYSTEM AND GRAPHICAL USER INTERFACE – ROLE AND
FUNCTIONS
TOPIC : TYPES OF OPERATING SYSTEM
1. SINGLE USER OPERATING SYSTEM
Single User operating system was the initial version of the operating system that
allowed only one user to work with the computer at a time. The most popular Single User
Operating Systems were: Microsoft DOS, Microsoft Windows 3.1, Microsoft Windows
95. Due to their limited features, they are no longer in use nowadays.
2. MULTI-USER OPERATING SYSTEM
Multi-user operating system allows more than one user to use the same computer at the
same time or at different times. Some Operating Systems, which fall in this category are: windows
2000, NT, Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1, Linux, Unix•
Windows 2000 was the version of Windows, which allowed creation of several user accounts on a
single machine.
3. MULTI-PROCESSOR OPERATING SYSTEM
A Multi-Processor system consists of several processors that share a common physical memory. In
this system processors operate under single operating system. It provides higher computing power
and speed that allows to run and work in multiple applications at the same time. Execution of several
tasks by different processors at the same time, increases the system's performance.
4. MULTI-TASKING OPERATING SYSTEM
The ability to perform more than one task together at one time is called Multi-tasking. An operating
system, which is capable of doing multiple tasks or processes while using common processing
resource' ie using only One CPU is called a Multi-Tasking operating system. It switches from one
program to another so quickly that it gives the appearance of executing all programs at the same time.
Today, most operating systems fall under this category. Examples are: Unix, Linux, Windows XP,
Windows 7, Windows 8, Windows 8.1, Windows 10, etc.
5. MULTI-THREADING OPERATING SYSTEM
These operating systems allow different parts of a software program to run simultaneously. The
feature of multi. threading can delay the execution response of certain processes. For example, if you
host a Game server on LAN, your friends will utilise different parts of the same game by connecting
to your machine at the same time, All resources will be utilised from your machine, which can be a
performance degrading factor. The common examples of such operating systems are: Windows
NT/2000, Windows XP, Windows 7, Windows 8, Windows 8.1, Unix, Linux, etc.
6. RTOS (REAL TIME OPERATING SYSTEM)
RTOS is designed to handle real life scenarios and problems. Such operating systems have the
capability to prioritise the processes, minimise execution time, and work independently with no
interdependencies. Real time operating system is used when the time span required to react to an
input is rigid and time bound. Even microsecond of delay will cause the system to fail. Examples are:
Air traffic control, Robots, Weapon systems, and Industrial control systems.
There are two types of Real Time Operating Systems:
Hard Real-time systems: These systems guarantee that critical tasks are completed in time.
Soft Real-time systems: These systems are less restrictive. Examples are: Undersea exploration,
Planetary rover: and Virtual reality.
7. DISTRIBUTED OPERATING SYSTEM
Distributed operating system runs on a set of computers that are located in different geographical are:
interconnected by a network. It controls these interconnected systems and makes them appear as a
computer. It allows all the linked machines to access data and software, and the process takes over the
common network from different computers, irrespective of their location on the globe.
USE THIS HINT BOX TO FILL IN THE BLANKS.
(memory, geographical, multi tasking, RTOS, single, problems, two, Microsoft DOS)
1. ____ user operating system was the initial version of the operating system.
2. A multi processor system consists of several processors that share a common physical ____.
3. Real time operating system is abbreviated as _____.
4. The ability to perform more than one task together at one time is called _____.
5. ______ is a most popular Single user operating system.
6. RTOS is designed to handle real life scenarios and _____.
7. Distributed OS runs on a set of computers that are located in different ___ areas.
8. There are ___ types of Real Time Operating system.
WORKSHEET -5 Fill in the blanks
from the hint list mentioned here.
HINT : (processor, unauthorised, deletion,
secondary, I/O operations, commands, multiple,
directory, function, job executions.)
1. OS manages the sharing of internal memory among the multiple applications. 2. Operating system keeps the track of information regarding creation, deletion, transfer, copy and
storage of files.
3. OS maintains the integrity of the files including the file directory structure.
4. An OS handles the I/O operations of a computer system.
5. OS protect the resources and information stored on a computer system against unauthorised
access.
6. Enforcement of priority system means determine and maintain a specific order of various job
executions in the computer system.
7. User communicates with the OS using a standard set of system commands. 8. Processor management is the most important function of an operating system.
9. OS ensures that each process receives enough time from the processor to function properly.
10. Computer system uses a lot of data, which is stored on the secondary storage devices.
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Class – 8 Punjabi worksheet – 5 (For Mohali & Zirakpur Branches only)
Answer key of Punjabi worksheet – 4 (For Mohali & Zirakpur Branches only)
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Students are instructed to make subject wise notebooks for all the worksheets.