Memory Management: Optimizing Page Replacement with LRU Policy

Which frame will have its contents replaced under the LRU memory management policies?

Based on the given information, which frame will be replaced under the Least Recently Used (LRU) memory management policy?

Answer:

The frame that will have its contents replaced under the LRU memory management policy is frame number 1.

To determine which frame will be replaced under the LRU policy, we need to consider the access history of the pages in the page frames. The LRU policy suggests that the least recently used page should be replaced when a page fault occurs.

From the provided information, we can observe the time of the last access for each page frame:

• Frame 0: Last accessed at time 153
• Frame 1: Last accessed at time 99
• Frame 2: Last accessed at time 50
• Frame 3: Last accessed at time 106

Since the page fault occurred at time 164 for virtual page 23, which is the most recent event, we need to find the frame with the earliest last access time. Comparing the last access times of the frames, we can see that frame 1 has the earliest last access time of 99, which is less than the last access times of the other frames.

Therefore, under the LRU memory management policy, frame 1 will have its contents replaced with the new page (virtual page 23) that caused the page fault.