MadeEasy Subject Test: Operating System - Virtual Memory

Question

Comments

@rahul sharma your point is valid, putting more words in a block my reduce miss ratio but will increase miss penalty as you explained. on each miss more data need to be brought to cache.

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So,here only S2 is correct and c option ?

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ya ‘c’ seems to be correct. @rahul ‘s argument is 100% right. There will be a decrease in the number of time penalty is imposed, but it will not decrease the penalty itself. It is like saying that driving the car slow, will lower the penalty amount.

Answer 1

Temporal locality : If at a particular time, a memory location is referenced then chances are that it will be soon accessed again. Since most of the program is carried out in loops, same instructions and data are reused again and again.

In this case, it is common to make a copy of the most frequently used memory references and store it in a high speed physical storage (caches).

Spatial locality : If at a particular time, a memory location is referenced, then chances are that the nearby locations will also be accessed in due course of time.

Hence, we can say that temporal locality is a special case of spatial locality.

Here S1 speaks about spatial locality, S2 is true and S3 is false

So answer is choice B