JavaScript Interview Questions Quiz Part 7

Are you preparing for a JavaScript interview?

Test your skills with this quiz and see how well you know the fundamentals of JavaScript. These 10 questions are designed to challenge both beginners and intermediate developers, helping you identify areas where you might need more practice.

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Created on March 13, 2025 By PC Prajapat

JavaScript Interview Questions Quiz Part 7

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NameEmail

1 / 5

1. What will be the output of the following code?

 

console.log(1 + "1" - 1);

"10"

1

10

0

2 / 5

2. What is the result of typeof null?

"null"

"undefined"

"object"

"number"

3 / 5

3. What will console.log(2 ** 3) output?

5

6

8

9

4 / 5

4. What does the following code return?

console.log([] == ![]);

true

false

undefined

TypeError

5 / 5

5. What is the output of the following code?

const arr = [1, 2, 3];
console.log(arr.length = 0);
console.log(arr);

[1,2,3]

[]

undefined

[null,null,null]

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