What is JavaScript - Interactive Quiz & Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to display a message in the browser console.

Javascript

console.[1]('Hello, JavaScript!');

Drag options to blanks, or click blank then click option'

Awrite

Blog

Cprint

Dshow

Attempts:

3 left

💡 Hint

Common Mistakes

Using console.print or console.write which do not exist.

Trying to use alert instead of console.log.

The console.log function prints messages to the browser console.

2fill in blank

medium

Complete the code to declare a variable named name with the value 'Alice'.

Javascript

let [1] = 'Alice';

Drag options to blanks, or click blank then click option'

Aname

Blet

Cconst

Dvar

Attempts:

3 left

💡 Hint

Common Mistakes

Putting 'var' or 'let' in the blank instead of the variable name.

Using a number or string instead of a variable name.

The variable name is name. The code declares it with let.

3fill in blank

hard

Fix the error in the code to correctly add two numbers and store the result.

Javascript

let sum = 5 [1] 3;

Drag options to blanks, or click blank then click option'

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using minus or multiplication instead of addition.

Leaving the operator blank.

The plus sign + adds two numbers together.

4fill in blank

hard

Fill both blanks to create an object with a property and access its value.

Javascript

const person = { [1]: 'Bob' };
console.log(person.[2]);

Drag options to blanks, or click blank then click option'

Aname

Bage

Dheight

Attempts:

3 left

💡 Hint

Common Mistakes

Using different property names for key and access.

Using properties that are not defined.

The object has a property name. Access it with person.name.

5fill in blank

hard

Fill all three blanks to create a function that returns the square of a number.

Javascript

function [1]([2]) {
  return [2] [3] [2];
}

Drag options to blanks, or click blank then click option'

Asquare

Bnum

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using addition instead of multiplication.

Using different variable names inside the function.

The function named square takes num and returns num * num.