Frontend Development MCQ Quiz

Test your knowledge with 50 multiple choice questions covering JavaScript, React, CSS, HTML, and web development concepts. Practice for interviews with real MCQ questions.

Topic-wise Questions

Questions covering all major frontend technologies including HTML5, CSS3, JavaScript (ES6+), React, and Web Security.

Instant Explanations

Get immediate feedback on your answers. Learn why an answer is correct or incorrect to reinforce your understanding.

Track Your Score

See your progress in real-time. Review your performance at the end with a detailed breakdown of correct and incorrect answers.

Question 1 of 50

What is the difference between let, const, and var in JavaScript?

1/50

let and const are block-scoped, while var is function-scoped. const is immutable, let can be reassigned.

They are all the same, just different naming conventions.

var is block-scoped, let and const are function-scoped.

let is immutable, const can be reassigned, and var is block-scoped.

Jump to Question:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50