Operating System Basics Questions and Answers

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Q21
Which technique was introduced because a single job could not keep both the CPU and the I/O devices busy?
  • A Time-sharing
  • B SPOOLing
  • C Preemptive scheduling
  • D Multiprogramming
Answer: Option D
Q22
A critical region
  • A is a piece of code which only one process executes at a time
  • B is a region prone to deadlock
  • C is a piece of code which only a finite number of processes execute
  • D is found only in Windows NT operation system
Answer: Option A
Q23
The mechanism that bring a page into memory only when it is needed is called _____________
  • A Segmentation
  • B Fragmentation
  • C Demand Paging
  • D Page Replacement
Answer: Option C
Q24
PCB =
  • A Program Control Block
  • B Process Control Block
  • C Process Communication Block
  • D None of the above
Answer: Option B
Q25
FIFO scheduling is ________.
  • A Preemptive Scheduling
  • B Non Preemptive Scheduling
  • C Deadline Scheduling
  • D Fair share scheduling
Answer: Option B
Q26
Switching the CPU to another Process requires to save state of the old process and loading new process state is called as __________.
  • A Process Blocking
  • B Context Switch
  • C Time Sharing
  • D None of the above
Answer: Option B
Q27
Which directory implementation is used in most Operating System?
  • A Single level directory structure
  • B Two level directory structure
  • C Tree directory structure
  • D Acyclic directory structure
Answer: Option C
Q28
The Banker¿s algorithm is used
  • A to prevent deadlock in operating systems
  • B to detect deadlock in operating systems
  • C to rectify a deadlocked state
  • D none of the above
Answer: Option A
Q29
A thread
  • A is a lightweight process where the context switching is low
  • B is a lightweight process where the context swithching is high
  • C is used to speed up paging
  • D none of the above
Answer: Option A
Q30
______ is a high level abstraction over Semaphore
  • A Shared memory
  • B Message passing
  • C Monitor
  • D Mutual exclusion
Answer: Option C

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