Why objects are needed in Javascript - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create an object representing a person with a name.

Javascript

const person = { name: [1] }; console.log(person.name);

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

AAlice

B'Alice'

Cname

Dperson

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to put quotes around the string value.

Using a variable name instead of a string.

The name value must be a string, so it needs quotes around it.

2fill in blank

medium

Complete the code to access the age property of the object.

Javascript

const user = { age: 30 }; console.log(user.[1]);

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

Aname

Buser

C30

Dage

Attempts:

3 left

💡 Hint

Common Mistakes

Using the value instead of the property name.

Using a wrong property name.

To get the age, use the property name 'age' after the dot.

3fill in blank

hard

Fix the error in the code to correctly add a new property to the object.

Javascript

const car = {}; car[1]color = 'red'; console.log(car.color);

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

A.

B[

C=

D:

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' instead of '.' before the property name.

Using brackets without quotes.

Use dot notation to add a new property to an object.

4fill in blank

hard

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

Javascript

const greeter = { greet() { return [1] + this.[2]; } , name: 'Bob' }; console.log(greeter.greet());

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

A'Hello, '

Bname

Cgreet

D'Hi, '

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the greeting string.

Using the wrong property name after 'this'.

The method returns a greeting string plus the object's name property.

5fill in blank

hard

Fill all three blanks to create an object with properties and a method that uses them.

Javascript

const book = { title: [1], author: [2], getSummary() { return `${this.[3] by ${this.author}`; } }; console.log(book.getSummary());

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

A'1984'

B'George Orwell'

Ctitle

Dauthor

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up property names inside the method.

Not using 'this' to access object properties.

The method uses the title and author properties to create a summary string.