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

Default permissions of file can be changed with.

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

The system calls in UNIX is written using which language.

Question # 6

What is property of UNIX.

Question # 7

Dirty bit is used ot show

Question # 8

Printer in the file structure can be found in.

Question # 9

Belady anomaly occurs in.

Question # 10

Which of following need a device driever.

Question # 11

Remote computing services involves the use of.

Question # 12

Multiprogramming system

Question # 13

Which of following is not an advantage of multiprogramming.

Question # 14

Which command changes a files group owner

Question # 15

What control character signals the end of the input file.

Question # 16

Which of the following does not interrupt an running process.

Question # 17

Re location bits used by relocating loader are a pacified by

Question # 18

Problem of thrashing is affected significantly by

Question # 19

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

Question # 20

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

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PPSC ComputerScience Chapter 19 Important MCQ's

Sr.# Question Answer
1 What control character signals the end of the input file.
A. Ctrl + s
B. Ctrl + z
C. Ctrl + w
D. Ctrl + d
2 What is meaning of ILP32
A. 32 bit integrated Long & Pointer
B. 32 bit integer long & pointer
C. 32 bit integer Long & Point
D. 32 bit integer , Lost & pointer
3 Scissoring enables
A. A part of data to be displayed
B. Entire data to be displayed
C. Full data display on full area of seen
D. No data display
4 In real time OS, which is most suitable scheduling scheme.
A. Round robin
B. FCFS
C. Pre-emptive scheduling
D. Random scheduling
5 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
6 The part of machine level instruction which tells the central processor what has to be done is.
A. Operation code
B. Address
C. Locator
D. Flip flop
7 The system calls in UNIX is written using which language.
A. Java
B. C
C. C++
D. Assembly
8 Which of following need a device driever.
A. Cache
B. Disk
C. Main memory
D. Registers
9 Remote computing services involves the use of time sharing and
A. Multiprocessing
B. Interactive processing
C. Batch processing
D. Real time processing
10 Remote computing services involves the use of.
A. Multi processing
B. Multi programming
C. Batch processing
D. Real time processing

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