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Which of the following needs a clock?

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Which of the following needs a clock?

(a) Only Asynchronous

(b) Only synchronous

(c) Both synchronous and Asynchronous

(d) Sometimes Synchronous

The question was asked during an interview.

This intriguing question comes from USART Protocol topic in portion Internet Principles of IOT

1 Answer

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The correct option is (b) Only synchronous

Easy explanation: Synchronous mode requires both data and clock. Asynchronous mode requires only data.

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