Question # 1

The system calls in UNIX is written using which language.

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Java

C

C++

Assembly

For multiprogramming operating system.

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Special support from processor is essential

Special support from processor is not essential

Cache memory is essential

None of abvoe

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

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Instruction

Compiler

Program

Interpretor

What control character signals the end of the input file.

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Ctrl + s

Ctrl + z

Ctrl + w

Ctrl + d

Spooling most beneficial where

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Jobs are I/O bound

Jobs are CPU bound

Jobs are evenly divided as I/O bound are CPU bond

All of above

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

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CPU

ALU

CU

Processor

A thread is.

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Lightweight process where the context switching is low

Lightweight process where the context switching is high

Used to speed up paging

Used in dead locks

Which among following scheduling algorithms give minimum average waiting time.

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FCFS

SJF

Round rabin

On priority

Which of following need a device driever.

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Cache

Disk

Main memory

Registers

Which technique is used by operating systems to execute several program concurrently by switching back and forth.

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Partitioning

Multitasking

Windowing

Paging

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

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dd

du

dt

di

Distributed system should.

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High security

Have better resource sharing

Better system utilization

Low system overhead

Printer in the file structure can be found in.

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/etc

/html

/www

/dev

Which command in LINUX is used for description any command.

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Help

Man

Detail

Short detail

Which is non pre emptive

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Round robin

FIFO

MS

MSF

Main function of shared memory is.

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To use primary memory efficiently

To do intra process communication

All of above

None

A publics key encryption system.

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Allows only the correct sender to decode the data

Allows only the correct receiver to decode the data

Allows any one to decode the data

None of above

Which is not a valid file type in LINUX.

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Socket

FIFO

Soft link

Inode

Dynamic allocation of storage areas with VSAM files is accomplished by

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Hashing

Control splits

Over flow areas

Relative recording

If two files on same partition point to the same inode structure they are called.

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Soft links

Hard links

Copy links

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Virtual storage

Time sharing

Multi programming

Multi heading

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PPSC Computer Science Chapter 19 Operating System Online Test MCQs With Answers

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