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Operating Systems

Description: Test papers for Unix, Linux, OS, BSD, Linux Operating System, Functions of Operating System, Operating System study material to prepare for M.Sc-IT, MCA Entrance, BCA, B.Sc-IT
Number of Questions: 10
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Tags: Operating System OS Computer Operating Systems Types of Operating System Linux Operating System Operating System Concepts Functions of Operating System Microsoft Windows Mac OS X MCA Entrance B.Sc-IT M.Sc-IT BCA Information Technology
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Trojan horse programs

  1. are legitimate programs that allow unauthorised access

  2. usually don't work

  3. are hidden programs that do not show up on the system

  4. are usually immediately discovered


Correct Option: A

The memory allocation scheme subject to 'external fragmentation' is

  1. segmentation

  2. swapping

  3. pure demand paging

  4. multiple contiguous fixed partition


Correct Option: A

Blocks of buffer caches are used

  1. to improve the disk performance

  2. to handle interrupts

  3. to increase the capacity of main memory

  4. to speed up memory read operation


Correct Option: A

In which addressing mode is the address of the location of an operand given explicitly?

  1. Absolute mode

  2. Immediate mode

  3. Index mode

  4. Modulus mode


Correct Option: A

A dispatcher

  1. actually schedules the tasks into the processor

  2. puts tasks in 110 wait

  3. is always small and simple

  4. never changes task priorities


Correct Option: A

A command interpreter

  1. is usually the primary user interface

  2. requires fixed format commands

  3. is menu drive

  4. is quite different from the SCL interpreter


Correct Option: A

What is the initial value of the semaphore to allow only one of the many processes to enter its critical section?

  1. 8

  2. 1

  3. 16

  4. 0


Correct Option: B

A system program that sets up an executable program in main memory ready for execution, is

  1. an assembler

  2. a linker

  3. a loader

  4. a compiler


Correct Option: C

Which of the following is/are the phase(s) of compilation process?

  1. Lexical analysis

  2. Code generation

  3. Static analysis

  4. Both (1) and (2)


Correct Option: D

Which of the following is true about Pseudo code?

  1. It is a machine language.

  2. It is an assembly language.

  3. It is a high-level language.

  4. None of the above


Correct Option: D
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