10 JavaScript MCQ Questions to Practice with Answers

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10 JavaScript MCQ Questions to Practice with Answers

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Post published:8 February 2024

In this post, we will conduct 10 JavaScript MCQ Questions to practice with answers. By completing this you will be able to improve your knowledge in coding. So let’s Get started

JavaScript MCQ Quiz

Page 1 of 10

What is the correct way to declare a variable in JavaScript? var x = 5; let x = 5; const x = 5; All of the above

Page 2 of 10

What does the === operator do in JavaScript? Checks for equality in value Checks for equality in value and type Assignment operator Logical AND operator

Page 3 of 10

Which function is used to print content to the console in JavaScript? print() log() console.log() display()

Page 4 of 10

What is the purpose of the setTimeout function in JavaScript? Pauses the execution of code Sets a timer for a function to be executed after a specified time Measures the execution time of a function None of the above

Page 5 of 10

How do you comment out multiple lines in JavaScript? /* This is a comment */ // This is a comment /** This is a comment */

Page 6 of 10

What is the purpose of the splice method in JavaScript? Adds or removes elements from an array Concatenates two arrays Sorts the elements of an array Reverses the elements of an array

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Which keyword is used to prevent a variable from being modified in JavaScript? lock freeze const protect

Page 8 of 10

What does the term "hoisting" refer to in JavaScript? Lifting heavy objects in code Moving declarations to the top of the current scope during compilation Running code before it is declared Floating-point arithmetic

Page 9 of 10

What is the purpose of the JSON.stringify method in JavaScript? Parses a JSON string Retrieves a value from a JSON object Checks if a string is valid JSON Converts a JavaScript object to a JSON string

Page 10 of 10

How do you create a new object in JavaScript? new Object() {} (curly braces) createObject() Both A and B

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10 JavaScript MCQ Questions to Practice with Answers

JavaScript MCQ Quiz

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