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Which of the following IMAP command is used to update and amounts to a heartbeat signal and response?

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Which of the following IMAP command is used to update and amounts to a heartbeat signal and response?

(a) EXIT

(b) IDLE

(c) CLOSE

(d) All of the mentioned

I had been asked this question during an online interview.

The origin of the question is Push Services topic in chapter Mobile Cloud and Mobile Web Services of Cloud Computing

1 Answer

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Correct choice is (b) IDLE

The best I can explain: Some polling mechanisms set the polling interval so short that the system appears to behave as if it is a push technology.

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