Question

Which of the following scheduler/schedulers is/are also called CPU scheduler?
(A) Short Term Scheduler
(B) Long Term Scheduler
(C) Medium Term Scheduler
(D) Asymmetric Scheduler
Choose the correct answer from the options given below:

• A. (A), (B) and (C) only
• B. (A), (B) and (C) only
• C. (A), (B), (C) and (D)
• D. (A) only

Hint:

The **Short Term Scheduler** is the only scheduler referred to as the **CPU Scheduler**, as it allocates CPU time to processes.

Answer 1

The Correct Option is A

Phase 1: Define CPU Scheduler.
The CPU scheduler, also referred to as the short-term scheduler, selects a process from the ready queue for CPU allocation. This selection occurs rapidly, generally within milliseconds.

Phase 2: Evaluate Alternatives.
- (A) Short Term Scheduler: Accurate. This scheduler allocates CPU time.
- (B) Long Term Scheduler: Inaccurate. This scheduler controls process admission, not direct CPU scheduling.
- (C) Medium Term Scheduler: Inaccurate. This scheduler adjusts multiprogramming levels by swapping processes.
- (D) Asymmetric Scheduler: Inaccurate. This is not a recognized CPU scheduling term.

Phase 3: Conclude.
The Short Term Scheduler functions as the CPU scheduler. Therefore, the correct response is (A) exclusively.