Which of the following is true about scheduler?

Which of the following is true about scheduler?
| Which of the following is true about scheduler?

A. The job scheduler selects from among the processes that are ready to execute and allocates the CPU to one of them.

B. The short-term scheduler loads selected processes into memory for execution.

C. The long-term scheduler executes much less frequently.

D. All of the above

Please scroll down to see the correct answer and solution guide.

Right Answer is: C

SOLUTION

  1. False: The processes are spooled to a mass-storage device such as a disk, where they are kept for later execution. The long-term scheduler, or job scheduler, select processes from this pool and loads them into memory for execution.

  2. False: The short-term scheduler, or CPU scheduler, selects from among the processes that are ready to execute and allocates the CPU to one of them.

  3. True: The long-term scheduler may need to be invoked only when a process leaves the system. Because of the longer interval between executions, the long-term scheduler can afford to take more time to decide which process should be selected for execution.

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