1.

Cycle-stealing mode of DMA operation involves:

A. DMA controller takes over the address, data and control buses while a block of data is transferred between memory and an I/O device
B. While the μP is executing a program an interface circuit takes over control of the address, data and control buses when not in use by the μP
C. Data transfer takes place between the I/O device and memory during every alternate clock cycle
D. The DMA controller waits for the μP to finish execution of the program and then takes over the buses.
Answer» D. The DMA controller waits for the μP to finish execution of the program and then takes over the buses.


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