Which of the following statements are true in the context of the memory hierarchy?

1.As we move from top to bottom in the hierarchy, the capacity increases

2.As we move from top to bottom in the hierarchy, the access time increases

3.Minimizing how far down the hierarchy one must go to manipulate data is a major way to increase performance

4.As we move from bottom to top, the cost per bit increases, so internal memory is costlier than external memory

A1, 2 and 3

B2, 3 and 4

C1, 2, 3 and 4 ✓ Correct

D2 and 4

Correct answer: (C) 1, 2, 3 and 4

Explanation

All four statements about the memory hierarchy hold true.

Statement 1 is right, since capacity grows as you move down the hierarchy.

Statement 2 is right, since access time also grows further down.

Statement 3 is right, since staying near the top for data speeds up performance.

Statement 4 is right, since cost per bit rises upward, making internal memory dearer than external.

Registers sit at the top, fastest and costliest, while disks sit near the bottom.

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