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

Which of the following does not interrupt an running process.

Question # 3

Which of following is not an advantage of multiprogramming.

Question # 4

Problem of thrashing is affected significantly by

Question # 5

Default permissions of file can be changed with.

Question # 6

Poor response times are caused by

Question # 7

Semaphores are used to solve the problem of.

Question # 8

Printer in the file structure can be found in.

Question # 9

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

Question # 10

Distributed systems should.

Question # 11

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

Question # 12

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

Question # 13

Dijkstra's algorithm deals with

Question # 14

To display disk consumption of a specific directory which command is used.

Question # 15

Memory protection is normally done by

Question # 16

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

Question # 17

Distributed system should.

Question # 18

Which command in LINUX is used for description any command.

Question # 19

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

Question # 20

Which command is used to set limits on file size.

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PPSC Class ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 All device files are stored in which directory.
A. /etc
B. /dev
C. /www
D. /html
2 Which scheduling policy is most suitable for time shared operating system.
A. Shortest job first
B. FCFS
C. LCFS
D. Round robin
3 Four necessary conditions for dead lock are none pre emption circular wait and
A. Mutual exclusion
B. Race condition
C. Buffer overflow
D. None of above
4 The system calls in UNIX is written using which language.
A. Java
B. C
C. C++
D. Assembly
5 Which command is concerned with LINUX kernel log messages.
A. dmsg
B. dmesg
C. cmsg
D. cmesg
6 Which command is used to copy files.
A. cp
B. copy
C. mv
D. move
7 To avoid the race condition the number of process that may be simultaneously inside the critical section is
A. 1
B. 3
C. 0
D. 12
8 What is the command that can print lines of first file matching with second file.
A. Printline
B. cmp
C. com
D. comn
9 What is the maximum number of processes that may enter simultaneously inside the critical section to avoid race condition.
A. One
B. Two
C. Three
D. Four
10 Problem of thrashing is affected significantly by
A. Program structure
B. Program size
C. Primary storage size
D. All of above

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