Why JavaScript is widely used - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

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

Javascript

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

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

Alog

Bprint

Cwrite

Dshow

Attempts:

3 left

💡 Hint

Common Mistakes

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

The console.log method is used to print messages to the browser console.

2fill in blank

medium

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

Javascript

let [1] = 'Alice';

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

Avar

Bname

Clet

Dconst

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'var' or 'const' as variable names instead of 'name'.

The variable name should be name as specified.

3fill in blank

hard

Fix the error in the function declaration to correctly greet a user.

Javascript

function greet([1]) {
  return `Hello, ${name}!`;
}

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

Aname

BuserName

Cuser

Dgreeting

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different parameter name than the one used inside the function.

The parameter name should be name to match the template literal inside the function.

4fill in blank

hard

Fill both blanks to create an array of numbers and get its length.

Javascript

const numbers = [[1]];
const length = numbers.[2];

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

A1, 2, 3, 4, 5

Bsize

Clength

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'size' or 'count' instead of 'length' for array size.

The array contains numbers separated by commas. The property to get the number of elements is length.

5fill in blank

hard

Fill all three blanks to create an object with a method that returns a greeting.

Javascript

const person = {
  [1]: 'Bob',
  [2]() {
    return `Hi, I am ${this.[3]`;
  }
};

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

Aname

Bgreet

DsayHello

Attempts:

3 left

💡 Hint

Common Mistakes

Using inconsistent names for the property and inside the method.

The object has a property name, a method greet, and inside the method it uses this.name to access the property.