Question

What does DMA stand for?

(a) direct memory access

(b) direct main access

(c) data main access

(d) data memory address

This question was addressed to me in final exam.

I would like to ask this question from Cache Memory topic in portion Memory Systems of Embedded Systems

Answer 1

The correct option is (a) direct memory access

The explanation is: The DMA is direct memory access which can modify the memory without the help of the processor. If any kind of memory access by DMA to be done, it will passes a request to the processor bus and the processor provides an acknowledgment and gives the control of the bus to the DMA.