Operating System Basics Questions and Answers

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Q131
Virtual memory is __________.
  • A An extremely large main memory
  • B An extremely large secondary memory
  • C An illusion of extremely large main memory
  • D A type of memory used in super computers.
Answer: Option C
Q132
The kernel keeps track of the state of each task by using a data structure called __
  • A Process control block
  • B User control block
  • C Memory control block
  • D None of the above
Answer: Option A
Q133
A binary semaphore
  • A has the values one or zero
  • B is essential to binary computers
  • C is used only for synchronisation
  • D is used only for mutual exclusion
Answer: Option A
Q134
_________ page replacement alogorithm suffers from Belady's anamoly.
  • A LRU
  • B MRU
  • C FIFO
  • D LIFO
Answer: Option C
Q135
A program at the time of executing is called ________.
  • A Dynamic program
  • B Static program
  • C Binded Program p
  • D A Process
Answer: Option D
Q136
_________ is a high speed cache used to hold recently referenced page table entries a part of paged virtual memory
  • A Translation Lookaside buffer
  • B Inverse page table
  • C Segmented page table
  • D All the above
Answer: Option A
Q137
If you don¿t know which version of MS-DOS you are working with, which command will you use after booting your operating system ?
  • A Format command
  • B FAT command
  • C VER command
  • D DISK command
Answer: Option C
Q138
_______ OS pays more attention on the meeting of the time limits.
  • A Distributed
  • B Network
  • C Real time
  • D Online
Answer: Option C
Q139
A process said to be in ___________ state if it was waiting for an event that will never occur.
  • A Safe
  • B Unsafe
  • C Starvation
  • D Dead lock
Answer: Option D
Q140
The removal of process from active contention of CPU and reintroduce them into memory later is known as ____________.
  • A Interrupt
  • B Swapping
  • C Signal
  • D Thread
Answer: Option B

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