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 concerned with LINUX kernel log messages.

Question # 2

How many links are created when we create a directory file.

Question # 3

Creating a job queue is a function of

Question # 4

Super visor state is only allowed to.

Question # 5

Which is non pre emptive

Question # 6

File can have.

Question # 7

In which of the following usually a front end processor is used.

Question # 8

Semaphores are used to solve the problem of.

Question # 9

Dijkstra's algorithm deals with

Question # 10

Reference bit is used for

Question # 11

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

Question # 12

A publics key encryption system.

Question # 13

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

Question # 14

What is the meaning of SVR 4

Question # 15

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

Question # 16

Seek analysis is for.

Question # 17

Remote computing services involves the use of time sharing and

Question # 18

How applications communicates with kernel.

Question # 19

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

Question # 20

Which one is true.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 Belady anomaly occurs in.
A. LIFO
B. FIFO
C. LRU
D. NRU
2 Distributed systems should.
A. Meet time constraints
B. Aim better resource sharing
C. Aim better system utilization
D. Aim low system overhead
3 What control character signals the end of the input file.
A. Ctrl + s
B. Ctrl + z
C. Ctrl + w
D. Ctrl + d
4 Which command in LINUX is used for description any command.
A. Help
B. Man
C. Detail
D. Short detail
5 File record length
A. Should be chosen to match the data characteristics
B. Should be fixed
C. Should be variable
D. Vary system to system
6 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
7 In real time OS, which is most suitable scheduling scheme.
A. Round robin
B. FCFS
C. Pre-emptive scheduling
D. Random scheduling
8 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.
9 Dirty bit is used ot show
A. Page with corrupted data
B. Wrong page in memory
C. Page that a modified after being loaded in the cache memory
D. Page that is less frequently accessed
10 Which of following need a device driever.
A. Cache
B. Disk
C. Main memory
D. Registers

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