A cache is a special hardware with the attribute that it fin

A cache is a special hardware with the attribute that it finds and retrieves an item really fast. Suppose this attribute is true irrespective of the cache\'s size (that is, speed is not dependent on cache size). On this premise, argue on the validity of the claim that \"a cache can be made as large as the device for which it is caching (for instance, a cache as large as a disk) and thereby eliminate the device itself\".

Solution

We can eliminate the device by the cache only if :-

a) If the device retains the data is electricity is removed then cache should also do that. In short if the device is non volatile then cache should also be non-volatile

and

b) Cost factor: SInce high speed storage are much expensive so it should be easily affordable to be replaced .


So it becomes difficult for us to achieve and we can only achieve of the above two conditions are met.