Basic Operating System MCQ

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