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

Question # 1

The part of machine level instruction which tells the central processor what has to be done is.

Choose an answer

Operation code

Address

Locator

Flip flop

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Question # 2

Which command is used to set terminal input output characteristics

Choose an answer

Atty

stty

dtty

itty

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Question # 3

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

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Chat

Talk

Write

Sending

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Question # 4

Re location bits used by relocating loader are a pacified by

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Relocating loader

Assembler

Translator

Linker

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Question # 5

What control character signals the end of the input file.

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Ctrl + s

Ctrl + z

Ctrl + w

Ctrl + d

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Question # 6

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

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Segmentation

Swapping

Demand paging

Multiple contiguous fixed partitions

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Question # 7

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

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Round robin

FCFS

Pre-emptive scheduling

Random scheduling

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Question # 8

Which among following is considered as super daemon.

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Sysinit

Grep

Init

Locate

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Question # 9

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

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Question # 10

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

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get

tar

untar

cut

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Question # 11

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

Choose an answer

script

Record

Copy

Session

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