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Which of the following functions can be used to find the protocol version of the pickle module currently being used?

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Which of the following functions can be used to find the protocol version of the pickle module currently being used?

(a) pickle.DEFAULT

(b) pickle.CURRENT

(c) pickle.CURRENT_PROTOCOL

(d) pickle.DEFAULT_PROTOCOL

This question was addressed to me during an internship interview.

The above asked question is from Pickle Module topic in chapter Mapping Functions and Modules of Python

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Correct answer is (d) pickle.DEFAULT_PROTOCOL

The explanation is: The function pickle.DEFAULT_PROTOCOL can be used to find the protocol version of the pickle module currently being used by the system.

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