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

Poor response times are caused by

Question # 3

if the CPU scheduling policy is FCFS then what would be average waiting time.

Question # 4

Which command changes a files group owner

Question # 5

Reference bit is used for

Question # 6

What is the command that can print lines of first file matching with second file.

Question # 7

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

Question # 8

Which among following is considered as super daemon.

Question # 9

Which command gives the first byte where the difference is in the file 1 & file2

Question # 10

Dirty bit is used ot show

Question # 11

A high paging rate

Question # 12

Problem of thrashing is affected significantly by

Question # 13

Which of following is not an advantage of multiprogramming.

Question # 14

Remote computing services involves the use of.

Question # 15

Which command is used to copy files.

Question # 16

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

Question # 17

A series of statements explaining how the data is to be processed is called.

Question # 18

Size of virtual memory depends on

Question # 19

Which command is used to know the LINUX version.

Question # 20

Which of the following is always there in a computer.

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Sr.# Question Answer
1 Which command gives the first byte where the difference is in the file 1 & file2
A. Diff
B. differ
C. Cmp
D. Compare
2 which option of 'grep' displays the line number as well.
A. -n
B. -i
C. -d
D. -al
3 Main function of shared memory is.
A. To use primary memory efficiently
B. To do intra process communication
C. All of above
D. None
4 Belady anomaly occurs in
A. Optimal replacement
B. FIFO
C. LRU
D. Both in FIFO and LRU
5 For multiprogramming operating system.
A. Special support from processor is essential
B. Special support from processor is not essential
C. Cache memory is essential
D. None of abvoe
6 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.
7 A series of statements explaining how the data is to be processed is called.
A. Instruction
B. Compiler
C. Program
D. Interpretor
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 Which one shows the name of the operating system.
A. U name -n
B. Uname -I
C. U name - m
D. U name -o
10 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

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