Gdefine memory hierarchy. a. the rate at which information can be transferred from one place to another. b. ordering storage systems according to their speed, capacity, and cost. c. when the cpu tries to read from a memory location and it has to wait for the information to be retrieved from main memory. d. an i/o device, such as a keyboard, that is used to control a computer. e. a circuit that interfaces between a peripheral device and a bus connected to the cpu.

The correct option is B.

Explanation:

Memory hierarchy is the ordering of storage systems according to their speed, capacity and cost.

The hierarchy consist of Register as the top, followed by cache, then main memory, secondary memory and external storage. As you go down the hierarchy, the speed decreases, the size increases and the cost decreases also.

Memory hierarchy diagram is attached for reference.

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