Question

What parameters does Array.join() accept?

A. A number
B. An object
C. A function that returns a non-string value
D. A separator that is longer than the array itself

Answer 1

Array.join() accepts a string as a separator, which can be longer than the array itself when the elements are joined into a string.

Step-by-step explanation:

The Array.join() method in JavaScript accepts one parameter: a string to be used as a separator between the elements of the array when they are joined together into a string.

If the separator is not provided, a comma will be used by default. The separator can indeed be longer than the array itself, or even an empty string, which would concatenate the elements without any characters in between them.

Therefore, the correct answer is D, a separator that is longer than the array itself can be used.