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

Which command is used to know the LINUX version.

Question # 2

What control character signals the end of the input file.

Question # 3

Which is non pre emptive

Question # 4

Belady anomaly occurs in

Question # 5

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

Question # 6

What is meaning of ILP32

Question # 7

Which among following is considered as super daemon.

Question # 8

How many links are created when we create a directory file.

Question # 9

Which command is used to determine the path of an executable file.

Question # 10

File inode number can be viewed by.

Question # 11

Spooling most beneficial where

Question # 12

Belady anomaly occurs in.

Question # 13

Which one shows the name of the operating system.

Question # 14

Dirty bit is used ot show

Question # 15

Reference bit is used for

Question # 16

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

Question # 17

Which command is used to set limits on file size.

Question # 18

File record length

Question # 19

Which one is true.

Question # 20

Which of following need a device driever.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 A thread is.
A. Lightweight process where the context switching is low
B. Lightweight process where the context switching is high
C. Used to speed up paging
D. Used in dead locks
2 Which scheduling policy is most suitable for time shared operating system.
A. Shortest job first
B. FCFS
C. LCFS
D. Round robin
3 Disk scheduling includes decinding
A. Which should be accessed next
B. Order in which disk access requests must be serviced
C. The physical location of the file
D. the logical location of the file
4 How applications communicates with kernel.
A. Not disclosed by linux team
B. SSL
C. System calls
D. Shell
5 Which operating system reacts in the acutal time.
A. Batch system
B. Quick response system
C. Real time system
D. Time sharing system
6 What is meaning of ILP32
A. 32 bit integrated Long & Pointer
B. 32 bit integer long & pointer
C. 32 bit integer Long & Point
D. 32 bit integer , Lost & pointer
7 Which LINUX command is used to update the modification time of a file.
A. UPDATE
B. MODIFY
C. TOUCH
D. UNTOCUH
8 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
9 File record length
A. Should be chosen to match the data characteristics
B. Should be fixed
C. Should be variable
D. Vary system to system
10 Banker's algorithm deals with
A. Dead lock prevention
B. Dead lock avoidance
C. Dead look recovery
D. Mutual exclusion

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