If a string value is undefined in a key's value, it is set to ____.
A) *
B) the number 0
C) null
D) the number 1

Question

Quizplus · Accepted Answer

In JavaScript, undefined is a special value that represents the absence of a value. If a string value is undefined in a key's value, it should be set to null. Setting it to a number such as 0 or 1 may cause confusion or logical errors in your code. Using "*" is not a valid option.

If a String Value Is Undefined in a Key's Value