Mode of data transfer

Question

Which of the following mode of data transfer uses Interrupt mechanism ? (More then may be correct)

• A. Programmed I/O
• B. Interrupt Driven data transfer
• C. DMA Mode
• D. Asynchronous I/O
• E. Synchronous I/O
• F. None of the above

Comments

B,C and E are correct option right ?

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Why would synchronous use interrupt? Asynchronous should be using interrupts.

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In synchronous I/O mode of data transfer when an i/o operation is encountered the process moves to Waiting state until I/O is done then I/O generates interrupt so that process moves back to ready queue. In asynchronous process doesn't wait for completion of I/O later I/O informs process by setting up some variables,or simply notifying no sort of context switch type happens

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I think B,C,Dand E are correct