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JavaScript MCQs

Which of the following are correct values of variable, and why?

<script>

VariableA = [6,8];

VariableB = [7,9];

variableC = variable + variable;

</script>

6, 7, 8 and 9. The + operator is defined for arrays, and it concatenates strings, so it converts the arrays to strings.

6, 15 and 9. The + operator is defined for arrays, and it concatenates numbers, so it converts the arrays to numbers.

6, 8, 7 and 9. The + operator is defined for arrays, and it concatenates strings, so it converts the arrays to strings.

6, 87 and 9. The + operator is not defined for arrays, and it concatenates strings, so it converts the arrays to strings.

Answer

Correct Answer: 6, 87 and 9. The + operator is not defined for arrays, and it concatenates strings, so it converts the arrays to strings.

Explanation:

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