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PPSC Computer Science Chapter 19 Operating System Online Test MCQs With Answers

Question # 1

Multiprogramming system

Choose an answer

Are easier to develop than signal programming system.

Execute each job faster

Execute more jobs in the same time

Are used only on large main frame computers.

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Question # 2

Which command can be used to know the present working directory.

Choose an answer

pad

pww

pwd

pdd

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Question # 3

When did IBM released the first version of its disk operating system DOS version 1.0

Choose an answer

1981

1982

1983

1984

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Question # 4

What communication command provides communication to another user logged on by writing to the bottom of their terminal

Choose an answer

Chat

Talk

Write

Sending

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Question # 5

if the CPU scheduling policy is FCFS then what would be average waiting time.

Choose an answer

10 ms

10.8 ms

12 ms

12.8 ms

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Question # 6

Which is signal user operating system.

Choose an answer

MS-DOS

UNIX

XENIX

LINUX

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Question # 7

Which technique is used by operating systems to execute several program concurrently by switching back and forth.

Choose an answer

Partitioning

Multitasking

Windowing

Paging

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Question # 8

Main function of shared memory is.

Choose an answer

To use primary memory efficiently

To do intra process communication

All of above

None

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Question # 9

Dirty bit is used ot show

Choose an answer

Page with corrupted data

Wrong page in memory

Page that a modified after being loaded in the cache memory

Page that is less frequently accessed

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Question # 10

Which command in vi editor command is used to copy the current line of the file.

Choose an answer

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Question # 11

Which type of software can be used to merge data of two files in one files.

Choose an answer

System software

Networking software

Documenting software

utility software

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