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What is the result for HandleGet()?

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What is the result for HandleGet()?

(a) Null

(b) Zero

(c) Empty

(d) Origin

I have been asked this question in an interview for internship.

I would like to ask this question from Multithreading topic in division Going Parallel, Handling Actuator and Sensor of IOT

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Correct choice is (a) Null

The explanation is: This method gets the current buffer state, without changing it. The method performs the necessary locking to enable safe of the buffer from multiple threads. The result may be null.

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