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

Seek analysis is for.

Question # 2

Reference bit is used for

Question # 3

Which command is used to extract a column from a text file.

Question # 4

Distributed systems should.

Question # 5

Which one is true.

Question # 6

To avoid the race condition the number of process that may be simultaneously inside the critical section is

Question # 7

Creating a job queue is a function of

Question # 8

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

Question # 9

Scissoring enables

Question # 10

Which is signal user operating system.

Question # 11

Which operating system use write through catches.

Question # 12

Which command is used to record a user login session in a file.

Question # 13

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

Question # 14

Which among following is considered as super daemon.

Question # 15

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

Question # 16

Fragmentation of a file system.

Question # 17

Spooling most beneficial where

Question # 18

Which is non pre emptive

Question # 19

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

Question # 20

All the abbreviations is vi editor can be shown by

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 How many links are created when we create a directory file.
A. 1
B. 2
C. 3
D. 4
2 Which technique is used by operating systems to execute several program concurrently by switching back and forth.
A. Partitioning
B. Multitasking
C. Windowing
D. Paging
3 All device files are stored in which directory.
A. /etc
B. /dev
C. /www
D. /html
4 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
5 In which scheduling policies context switching never takes place
A. FCFS
B. Round robin
C. Shortest job first
D. Pre empitive
6 A publics key encryption system.
A. Allows only the correct sender to decode the data
B. Allows only the correct receiver to decode the data
C. Allows any one to decode the data
D. None of above
7 What is property of UNIX.
A. Multi user
B. Multi processes
C. Multi tasking
D. All of above
8 if the CPU scheduling policy is FCFS then what would be average waiting time.
A. 10 ms
B. 10.8 ms
C. 12 ms
D. 12.8 ms
9 A series of statements explaining how the data is to be processed is called.
A. Instruction
B. Compiler
C. Program
D. Interpretor
10 Which of the following is always there in a computer.
A. Batch system
B. Operating system
C. Time sharing system
D. Controlling system

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