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Which of the following statements about synchronous and asynchronous I/O is NOT true?

A

An ISR is invoked on completion of I/O in synchronous I/O but not in asynchronous I/O

B

In both synchronous and asynchronous I/O, an ISR (Interrupt Service Routine) is invoked after completion of the I/O

C

A process making a synchronous I/O call waits until I/O is complete, but a process making an asynchronous I/O call does not wait for completion of the I/O

D

In the case of synchronous I/O, the process waiting for the completion of I/O is woken up by the ISR that is invoked after the completion of I/O

asked in I/O interface (interrupt and DMA mode) by gate

1 Answer

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In both synchronous and asynchronous I/O, an ISR (Interrupt Service Routine) is invoked after completion of the I/O

answered by vidhya

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