PPSC Computer Science Topic 19 MCQ's Test Preparation

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MCQ's Test For PPSC Computer Science Topic 19 Operating System

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PPSC Computer Science Topic 19 Operating System

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Question # 1

Problem of thrashing is affected significantly by

Question # 2

Shortest job First executes first the job.

Question # 3

What is the name of values that are automatically provided by software to reduce keystrokes.

Question # 4

Which command reads the content of another file in vi editor .

Question # 5

Which command is used to set terminal input output characteristics

Question # 6

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

Question # 7

Four necessary conditions for dead lock are none pre emption circular wait and

Question # 8

Which of following need a device driever.

Question # 9

By which command content of a file can be searched.

Question # 10

Which scheduling policy is best suited for time sharing operating system.

Question # 11

Dirty bit is used ot show

Question # 12

Creating a job queue is a function of

Question # 13

Which scheduling policy is most suitable for time shared operating system.

Question # 14

Which LINUX command is used to update the modification time of a file.

Question # 15

All the abbreviations is vi editor can be shown by

Question # 16

which option of 'grep' displays the line number as well.

Question # 17

What is the maximum number of processes that may enter simultaneously inside the critical section to avoid race condition.

Question # 18

File record length

Question # 19

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

Question # 20

Fragmentation of a file system.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 What control character signals the end of the input file.
A. Ctrl + s
B. Ctrl + z
C. Ctrl + w
D. Ctrl + d
2 Creating a job queue is a function of
A. Spooler
B. Interpolator
C. Complier
D. Drive
3 To avoid the race condition the number of process that may be simultaneously inside the critical section is
A. 1
B. 3
C. 0
D. 12
4 Which command changes a files group owner
A. chmod
B. chgrp
C. chown
D. chgrep
5 What communication command provides communication to another user logged on by writing to the bottom of their terminal
A. Chat
B. Talk
C. Write
D. Sending
6 Spooling most beneficial where
A. Jobs are I/O bound
B. Jobs are CPU bound
C. Jobs are evenly divided as I/O bound are CPU bond
D. All of above
7 Which command is used to extract a column from a text file.
A. get
B. tar
C. untar
D. cut
8 Memory protection is normally done by
A. The processor and the associated hardware
B. The operating system
C. The compiler
D. The user program
9 How many links are created when we create a directory file.
A. 1
B. 2
C. 3
D. 4
10 Remote computing services involves the use of time sharing and
A. Multiprocessing
B. Interactive processing
C. Batch processing
D. Real time processing

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