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The link between two processes P and Q to send and receive messages is called __________

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The link between two processes P and Q to send and receive messages is called __________

(a) communication link

(b) message-passing link

(c) synchronization link

(d) all of the mentioned

I got this question in an interview for internship.

This is a very interesting question from Inter Process Communication in chapter Processes of Operating System

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The correct answer is (a) communication link

The explanation: The link between two processes P and Q to send and receive messages is called communication link. Two processes P and Q want to communicate with each other; there should be a communication link that must exist between these two processes so that both processes can able to send and receive messages using that link.

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