Which of the following statements about the sizeof operator in C is correct?

Options

  • A. It returns the size of its operand in bytes
  • B. It always evaluates its operand before calculating the size
  • C. It returns the value stored in its operand
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

A. It returns the size of its operand in bytes

Detailed Explanation

Correct Answer: It returns the size of its operand in bytes.

The sizeof operator is used to determine the amount of memory occupied by a data type or object.

For example, if int x occupies 4 bytes, then sizeof(x) returns 4.

It does not return the value stored in x.

Also, sizeof generally does not evaluate its operand when the operand is an expression. This is why expressions such as sizeof(x++) do not increment x.

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