Show internal configuration of a DMA controller diagrammatically and explain howit’s working

Complete the below given diagram related to the DMA Controller,so that the effective communication takes place among the various individual components

The DMA transfers are performed by a control circuit called as __________(1 Point)Device interfaceDMA controllerData controllerOverlooker

How many classifications of DMA controllers are made based on the addressing capability?

Write a short note on DMA

___________ initializes DMA Controller by sending memory address and the block size (number of words) I/O deviceDMA InterruptCPUMemor