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

Step 1: Definition of CPU Scheduler.
The CPU scheduler, also known as the short-term scheduler, is responsible for selecting a process from the ready queue and allocating CPU time to it. This decision is made at a fast pace, typically every few milliseconds.

Step 2: Analysis of Options.
- (A) **Short Term Scheduler**: Correct, as it is the one responsible for the allocation of CPU time.
- (B) **Long Term Scheduler**: Incorrect, this scheduler determines which processes are admitted into the system, but does not directly schedule processes to the CPU.
- (C) **Medium Term Scheduler**: Incorrect, this scheduler manages the degree of multi-programming by swapping processes in and out of the memory.
- (D) **Asymmetric Scheduler**: Incorrect, this is not a standard term used for CPU scheduling.

Step 3: Conclusion.
The **Short Term Scheduler** is the CPU scheduler, so the correct answer is **(A) only**.