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

Question # 2

Belady anomaly occurs in.

Question # 3

What are the global locks.

Question # 4

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

Question # 5

Re location bits used by relocating loader are a pacified by

Question # 6

Semaphores are used to solve the problem of.

Question # 7

File inode number can be viewed by.

Question # 8

Which command changes a files group owner

Question # 9

Seek analysis is for.

Question # 10

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

Question # 11

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

Question # 12

Which is signal user operating system.

Question # 13

Memory protection is normally done by

Question # 14

Shortest job First executes first the job.

Question # 15

Which operating system reacts in the acutal time.

Question # 16

Kernel minimizes the frequency of disk access by keeping a pool of internal data buffer which helps to increase the response time this is known as.

Question # 17

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

Question # 18

Reference bit is used for

Question # 19

How applications communicates with kernel.

Question # 20

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

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 Which among following is considered as super daemon.
A. Sysinit
B. Grep
C. Init
D. Locate
2 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
3 Spooling most beneficial where
A. Jobs are I/O bound
B. Jobs are CPU bound
C. Jobs are evenly divided as I/O bound are CPU bond
D. All of above
4 Which is non pre emptive
A. Round robin
B. FIFO
C. MS
D. MSF
5 Creating a job queue is a function of
A. Spooler
B. Interpolator
C. Complier
D. Drive
6 Which among following scheduling algorithms give minimum average waiting time.
A. FCFS
B. SJF
C. Round rabin
D. On priority
7 Which command is used to determine the path of an executable file.
A. which
B. whom
C. locate
D. wex
8 Size of virtual memory depends on
A. Size of data bus
B. Size of address bus
C. Size of main memory
D. None of above
9 In real time OS, which is most suitable scheduling scheme.
A. Round robin
B. FCFS
C. Pre-emptive scheduling
D. Random scheduling
10 Poor response times are caused by
A. Busy processor
B. High I/O rate
C. High paging rates
D. any of above

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