Consider the following statements:

  • P – Process aging is enhancing a process priority temporarily to get it scheduled to run.
  • Q – A context switch takes place on every system call.
  • R – Using mutual exclusion guaranteed that a system avoids deadlock.
  • S – Heap size is known to the operating system when a system is launched firstly.
  • T – If a process suffers from starvation that means it never scheduled to run.
  • Which of the following statement is correct?
    (A) PQST
    (B) QRS
    (C) PT
    (D) PQRST


    Answer: (C)

    Explanation: P – Process aging is enhancing a process priority temporarily to get it scheduled to run.
    Q – A context switch is not necessary for every system call.
    R – Mutual exclusion does not guaranteed that a system avoids deadlock.
    S – Heap size is unknown to the operating system when a system is launched firstly.
    T – If a process suffers from starvation that means it never scheduled to run.
    Only P and T are correct.
    So, option (C) is correct.

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    • Last Updated : 04 Dec, 2018

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