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

00:00
Question # 1

Which is non pre emptive

Question # 2

Remote computing services involves the use of time sharing and

Question # 3

Which command is used to copy files.

Question # 4

What is property of UNIX.

Question # 5

How applications communicates with kernel.

Question # 6

Which operating system use write through catches.

Question # 7

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

Question # 8

Semaphores are used to solve the problem of.

Question # 9

File can have.

Question # 10

A publics key encryption system.

Question # 11

A series of statements explaining how the data is to be processed is called.

Question # 12

Seek analysis is for.

Question # 13

Belady anomaly occurs in.

Question # 14

Default permissions of file can be changed with.

Question # 15

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

Question # 16

Which command gives the first byte where the difference is in the file 1 & file2

Question # 17

In real time OS, which is most suitable scheduling scheme.

Question # 18

Size of virtual memory depends on

Question # 19

Which of the following memory allocation scheme is subject to external fragmentation.

Question # 20

In which scheduling policies context switching never takes place

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 In which scheduling policies context switching never takes place
A. FCFS
B. Round robin
C. Shortest job first
D. Pre empitive
2 What is the name of values that are automatically provided by software to reduce keystrokes.
A. Data values
B. Default values
C. Defined values
D. Fixed vallues
3 What the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer users productivity.
A. Defined values
B. Fixed values
C. Default values
D. None of the above
4 What control character signals the end of the input file.
A. Ctrl + s
B. Ctrl + z
C. Ctrl + w
D. Ctrl + d
5 File inode number can be viewed by.
A. -8
B. -1
C. -a
D. -t
6 The part of machine level instruction which tells the central processor what has to be done is.
A. Operation code
B. Address
C. Locator
D. Flip flop
7 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
8 Which command is LINUX is concerned with backup.
A. tar
B. zip
C. cpio
D. untar
9 Which command changes a files group owner
A. chmod
B. chgrp
C. chown
D. chgrep
10 Distributed system should.
A. High security
B. Have better resource sharing
C. Better system utilization
D. Low system overhead

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