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What is returned by the function if the space cannot be allocated by the function malloc(), realloc() and calloc()?

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What is returned by the function if the space cannot be allocated by the function malloc(), realloc() and calloc()?

(a) value

(b) error

(c) null pointer

(d) no value

The question was asked in an internship interview.

I would like to ask this question from General Utilities topic in chapter C Library of C

1 Answer

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Best answer
The correct choice is (c) null pointer

To explain: The pointer returned points to the lowest byte address of the allocated space. A null pointer is returned, if the space cannot be allocated.

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