Question

In the working-set strategy, which of the following is done by the operating system to prevent thrashing?

I. It initiates another process if there are enough extra frames

II. It selects a process to suspend if the sum of the sizes of the working-sets.

III. Exceeds the total number of available frames.

• A. Neither I nor II
• B. II only
• C. Both I and II
• D. I only

Answer 1

The correct option is B II only

If there are enough extra frames, another process can be initiated. If the sum of the working-set sizes increases, exceeding the total number of available frames, the operating system selects a process to suspend. The process's pages are written out (swapped), and its frames are reallocated to other processes. The suspended process can be restarted later."