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JavaScript Quiz

1 / 10

What function is used to output data to the console in JavaScript?

print()

console.log()

display()

log.console()

2 / 10

How do you declare a variable in JavaScript?

var myVariable;

let myVariable;

const myVariable;

All of the above

3 / 10

What symbol is used for comments in JavaScript?

// Comment

/* Comment */

# Comment

4 / 10

Which of the following is NOT a valid data type in JavaScript?

number

char

boolean

string

5 / 10

How do you define a function in JavaScript?

function myFunction() {}

def myFunction() {}

func myFunction() {}

define myFunction() {}

6 / 10

What is the purpose of the "addEventListener" method in JavaScript?

To create a variable

To add numbers

To handle events

To perform mathematical operations

7 / 10

Which operator is used for strict equality in JavaScript?

===

!==

8 / 10

What does the term "callback function" refer to in JavaScript?

A function that calls another function

A function that repeats a set of statements

A function that handles errors

A function passed as an argument to another function

9 / 10

What is the purpose of the "let" keyword in JavaScript?

To declare a constant

To declare a variable with block scope

To declare a global variable

To declare a function

10 / 10

What is the output of the code: console.log(5 + "5")?

5 + 5

Error

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