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A process is moved to wait queue when I/O request is made with ____________

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A process is moved to wait queue when I/O request is made with ____________

(a) non-blocking I/O

(b) blocking I/O

(c) asynchronous I/O

(d) synchronous I/O

The question was asked during an interview.

I would like to ask this question from I/O Subsystem in chapter Mass-Storage Structures of Operating System

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The correct answer is (b) blocking I/O

The explanation: None.

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