Which one of the following is the correct definition of the is_array() function in C++?

Options

  • A. It checks that the specified variable is of the array or not
  • B. It checks that the specified array is of single dimension or not
  • C. It checks that the array specified is of multidimension or not
  • D. More than one of the above
  • E. None of the above

Correct Answer (Detailed Explanation is Below)

A. It checks that the specified variable is of the array or not

Detailed Explanation

Answer: (A) It checks that the specified variable is of the array or not

In C++, std::is_array is a type trait provided by the <type_traits> header. It checks whether a specified type is an array type.

For example, std::is_array<int[5]>::value returns true because int[5] is an array type.

It does not specifically check whether an array is one-dimensional or multidimensional. Its basic purpose is simply to determine whether the supplied type is an array.

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