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 used to extract a column from a text file.

Question # 2

Printer in the file structure can be found in.

Question # 3

Which is not a valid file type in LINUX.

Question # 4

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

Question # 5

How applications communicates with kernel.

Question # 6

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

Question # 7

Which is the most important for Multi taskiing.

Question # 8

Which command can be used to know the present working directory.

Question # 9

What control character signals the end of the input file.

Question # 10

Which one shows the name of the operating system.

Question # 11

The part of machine level instruction which tells the central processor what has to be done is.

Question # 12

For multiprogramming operating system.

Question # 13

Which operating system reacts in the acutal time.

Question # 14

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

Question # 15

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

Question # 16

Dirty bit is used ot show

Question # 17

In which scheduling policies context switching never takes place

Question # 18

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

Question # 19

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

Question # 20

File can have.

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 The system calls in UNIX is written using which language.
A. Java
B. C
C. C++
D. Assembly
4 Macintosh computer uses
A. System 7.0
B. AU/X
C. Xenix
D. None
5 All device files are stored in which directory.
A. /etc
B. /dev
C. /www
D. /html
6 Distributed system should.
A. High security
B. Have better resource sharing
C. Better system utilization
D. Low system overhead
7 Which type of software can be used to merge data of two files in one files.
A. System software
B. Networking software
C. Documenting software
D. utility software
8 Which is non pre emptive
A. Round robin
B. FIFO
C. MS
D. MSF
9 What is property of UNIX.
A. Multi user
B. Multi processes
C. Multi tasking
D. All of above
10 In real time OS, which is most suitable scheduling scheme.
A. Round robin
B. FCFS
C. Pre-emptive scheduling
D. Random scheduling

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