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consider the following figure which conveys the operation of the Not Frequently Used ( NFU ) Page replacement Algorithm with Aging as discussed in class

consider the following figure which conveys the operation of the Not Frequently Used (NFU) Page
replacement Algorithm with Aging as discussed in class lectures and class text. This figure shows the
current usage of six page frames (numbered 0 through 5) currently allocated in memory for a number
of clock intervals (every 10ms), covering a total of 5 clock intervals. Each interval shows a snapshot of
the page usage AFTER the interval completes.
Please answer the following questions:
a. After time interval T1 completes (but before T2 starts), which page (0 through 5) would be
evicted by the algorithm to make room for a new page?
b. After time interval T2 completes (but before T3 starts), which page (0 through 5) would be
evicted by the algorithm to make room for a new page?
c. After time interval T3 completes (but before T4 starts), which page (0 through 5) has been
used the most frequent?(Justify your answer, and be VERY specific about what lead you to
this conclusion)
d. After time interval T4 completes (but before T5 starts, not shown), which page (0 through 5)
has been used the most frequent?
e. Still at interval T4, after completes (but before T5 starts, not shown), under the assumption that
ONLY page frames 0 or 1 are the ONLY choices for eviction, which page would the algorithm
pick? (Justify your answer, and be VERY specific about what lead you to this conclusion).

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