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JavaScript Interview Questions

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21.

How do you handle errors in JavaScript?

beginner

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22.

What is JSON and how do you work with it?

beginner

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23.

What is localStorage and sessionStorage?

beginner

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24.

What are cookies in JavaScript?

beginner

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25.

What is the difference between `undefined` and `not defined`?

beginner

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26.

What are falsy values in JavaScript?

beginner

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27.

What is the ternary operator?

beginner

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28.

What is type coercion in JavaScript?

intermediate

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29.

What is the difference between function declarations and function expressions?

intermediate

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30.

What are arrow functions and how do they differ from regular functions?

intermediate

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31.

What are higher-order functions?

intermediate

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32.

What is the `arguments` object and what are its limitations?

intermediate

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33.

How do you copy objects in JavaScript?

intermediate

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34.

What are array methods in JavaScript? Explain map, filter, and reduce

intermediate

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35.

What is array destructuring?

intermediate

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36.

What is a closure in JavaScript?

intermediate

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37.

Explain lexical scoping in JavaScript?

intermediate

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38.

What is the temporal dead zone?

intermediate

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39.

What is a prototype in JavaScript?

intermediate

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40.

What is the prototype chain?

intermediate

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Showing 21 to 40 of 115 results

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