by alex
JavaScript is the backbone of modern web development, enabling dynamic and interactive user experiences. Whether you’re a seasoned developer or just starting out, this quiz will put your JavaScript skills to the test with a variety of questions covering fundamental concepts, syntax, and advanced techniques. Sharpen your coding skills and see how well you know one of the most popular programming languages in the world. Good luck and have fun!
JavaScript Quiz Questions Overview
1. Which of the following is the correct syntax to create a new array in JavaScript?
var arr = [];
var arr = {};
var arr = ();
var arr = <>;
2. What is the output of the following code: console.log(typeof null);?
null
object
undefined
string
3. Which method is used to convert a JSON string into a JavaScript object?
JSON.stringify()
JSON.parse()
JSON.convert()
JSON.objectify()
4. What will be the output of the following code: console.log(0 == ‘0’);?
true
false
undefined
null
5. Which of the following is not a JavaScript data type?
Number
String
Boolean
Character
6. How can you add a comment in JavaScript?
// This is a comment
# This is a comment
/* This is a comment */
7. Which of the following is used to define a function in JavaScript?
function myFunction() {}
def myFunction() {}
func myFunction() {}
define myFunction() {}
8. What is the purpose of the ‘this’ keyword in JavaScript?
It refers to the current object
It is used to declare variables
It is a placeholder for a value
It is used to create new objects
9. Which of the following is used to handle exceptions in JavaScript?
try…catch
if…else
for…loop
while…loop
10. Which of the following is a JavaScript framework?
React
Laravel
Django
Spring
