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

Memory protection is normally done by

Question # 2

Remote computing services involves the use of time sharing and

Question # 3

Belady anomaly occurs in

Question # 4

Scissoring enables

Question # 5

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

Question # 6

Main function of shared memory is.

Question # 7

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

Question # 8

Banker's algorithm deals with

Question # 9

In vi editor which command sets the number for all lines.

Question # 10

Problem of thrashing is affected significantly by

Question # 11

File inode number can be viewed by.

Question # 12

Which command reads the content of another file in vi editor .

Question # 13

Multiprogramming system

Question # 14

Which operating system use write through catches.

Question # 15

File record length

Question # 16

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

Question # 17

Which command is used to extract a column from a text file.

Question # 18

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

Question # 19

The system calls in UNIX is written using which language.

Question # 20

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

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 if the CPU scheduling policy is FCFS then what would be average waiting time.
A. 10 ms
B. 10.8 ms
C. 12 ms
D. 12.8 ms
2 A series of statements explaining how the data is to be processed is called.
A. Instruction
B. Compiler
C. Program
D. Interpretor
3 Which operating system use write through catches.
A. UNIX
B. XENIX
C. ULTRIX
D. DOS
4 A hardware device which is capable of executing a sequence of instructions, is known as.
A. CPU
B. ALU
C. CU
D. Processor
5 Belady anomaly occurs in
A. Optimal replacement
B. FIFO
C. LRU
D. Both in FIFO and LRU
6 Which scheduling policy is best suited for time sharing operating system.
A. Shortest job first
B. Round robin
C. First come first serve
D. Elevator
7 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
8 Which command can be used to know the present working directory.
A. pad
B. pww
C. pwd
D. pdd
9 Problem of thrashing is affected significantly by
A. Program structure
B. Program size
C. Primary storage size
D. All of above
10 Which of following is not an advantage of multiprogramming.
A. Increased through out
B. Shorter response time
C. Ability to assign priories of jobs
D. Decreased system overload

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