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

A publics key encryption system.

Question # 2

Creating a job queue is a function of

Question # 3

Multiprogramming system

Question # 4

In which scheduling policies context switching never takes place

Question # 5

Banker's algorithm deals with

Question # 6

Which type of software can be used to merge data of two files in one files.

Question # 7

Size of virtual memory depends on

Question # 8

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

Question # 9

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

Question # 10

A hardware device which is capable of executing a sequence of instructions, is known as.

Question # 11

Seek analysis is for.

Question # 12

Printer in the file structure can be found in.

Question # 13

Which of the following does not interrupt an running process.

Question # 14

In the shell , by default all variables are considered and stored as.

Question # 15

Problem of thrashing is affected significantly by

Question # 16

File record length

Question # 17

What the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer users productivity.

Question # 18

Which command in LINUX is used for description any command.

Question # 19

Which of following is not an advantage of multiprogramming.

Question # 20

Spooling most beneficial where

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Sr.# Question Answer
1 Solaris is product of.
A. IBP
B. IBM
C. Microsoft
D. Sun microsystmes
2 Which LINUX command is used to update the modification time of a file.
A. UPDATE
B. MODIFY
C. TOUCH
D. UNTOCUH
3 Which command can be used to know the present working directory.
A. pad
B. pww
C. pwd
D. pdd
4 Dijkstra's algorithm deals with
A. Mutual exclusion
B. Dead lock avoidance
C. Dead lock recovery
D. Real time processing
5 In the shell , by default all variables are considered and stored as.
A. Integer
B. String
C. Float
D. Chracter
6 Distributed system should.
A. High security
B. Have better resource sharing
C. Better system utilization
D. Low system overhead
7 A high paging rate
A. May cause a high I/O rate
B. Keeps the system running well
C. Is a symptom of too much processor activity
D. Always creates a slow system.
8 Which command is used to determine the path of an executable file.
A. which
B. whom
C. locate
D. wex
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 Seek analysis is for.
A. Paging issues
B. Device busy problems
C. Control unit busy problems
D. All of above
11 Which command is concerned with LINUX kernel log messages.
A. dmsg
B. dmesg
C. cmsg
D. cmesg
12 Which command is used to know the LINUX version.
A. Uname
B. Vname
C. Iname
D. s name
13 Reference bit is used for
A. Implementing LRU page replacement algorithm
B. Implementing NRU algorithm
C. To check the page table entry in the cache memory
D. None of above
14 Default permissions of file can be changed with.
A. Group
B. Chperm
C. chmod
D. Chall
15 A hardware device which is capable of executing a sequence of instructions, is known as.
A. CPU
B. ALU
C. CU
D. Processor
16 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
17 Which command in LINUX is used for description any command.
A. Help
B. Man
C. Detail
D. Short detail
18 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
19 Which command is used to copy files.
A. cp
B. copy
C. mv
D. move
20 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

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