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

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

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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.

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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.

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

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Solution

The correct option is D In both synchronous and asynchronous I/O as ISR (Interrupt Service Routine) is invoked after completion of the I/O.
Statement (b) is not true because an ISR (Interrupt Service Routine) is invoked after completion of I/O in sychronous but not in asynchronous I/O.

Suggest Corrections

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

The correct option is D In both synchronous and asynchronous I/O as ISR (Interrupt Service Routine) is invoked after completion of the I/O.Statement (b) is not true because an ISR (Interrupt Service Routine) is invoked after completion of I/O in sychronous but not in asynchronous I/O.

The correct option is D In both synchronous and asynchronous I/O as ISR (Interrupt Service Routine) is invoked after completion of the I/O.
Statement (b) is not true because an ISR (Interrupt Service Routine) is invoked after completion of I/O in sychronous but not in asynchronous I/O.