Question

Which of the following interfaces perform the transfer of data between the memory and the I/O peripheral without involving the CPU?

• A. Branch Interface
• B. Serial Interface
• C. DMA
• D. DDA

Hint:

DMA is the standard interface for CPU-independent transfers; verify context if DDA is expected as the answer.

Answer 1

The Correct Option is D

Note: The widely accepted answer is (3) DMA (Direct Memory Access), as it is designed specifically to handle data transfer between memory and peripherals without CPU intervention. 
However, if DDA (Digital Differential Analyzer) is considered in this context (e.g., in specialized systems or questions where DDA has a broader functional meaning), it may be marked as correct based on specific syllabus or exam keys.