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

Belady anomaly occurs in

Question # 2

Remote computing services involves the use of.

Question # 3

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

Question # 4

Super visor state is only allowed to.

Question # 5

Default permissions of file can be changed with.

Question # 6

Which is not a valid file type in LINUX.

Question # 7

File record length

Question # 8

Creating a job queue is a function of

Question # 9

Which is the most important for Multi taskiing.

Question # 10

The system calls in UNIX is written using which language.

Question # 11

Semaphores are used to solve the problem of.

Question # 12

Solaris is product of.

Question # 13

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

Question # 14

Problem of thrashing is affected significantly by

Question # 15

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

Question # 16

A thread is.

Question # 17

Which of following need a device driever.

Question # 18

Which is signal user operating system.

Question # 19

Macintosh computer uses

Question # 20

Which among following is considered as super daemon.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 Which command is used to determine the path of an executable file.
A. which
B. whom
C. locate
D. wex
2 Which command is concerned with LINUX kernel log messages.
A. dmsg
B. dmesg
C. cmsg
D. cmesg
3 Daisy chain is a device for
A. Connecting a number of controllers to a device
B. Connecting a number of device to a controller
C. all of above
D. None of above
4 In which scheduling policies context switching never takes place
A. FCFS
B. Round robin
C. Shortest job first
D. Pre empitive
5 Semaphores are used to solve the problem of.
A. Race condition
B. Process synchronization
C. Mutual exclusion
D. Belady problem
6 What is the meaning of SVR 4
A. System five release 4
B. System version release 4
C. System five relocated 4
D. Storage files five release 4
7 Multiprogramming system
A. Are easier to develop than signal programming system.
B. Execute each job faster
C. Execute more jobs in the same time
D. Are used only on large main frame computers.
8 How many links are created when we create a directory file.
A. 1
B. 2
C. 3
D. 4
9 Which command is used to extract a column from a text file.
A. get
B. tar
C. untar
D. cut
10 File can have.
A. Read access
B. Write access
C. Copy access
D. All of above

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