Knowledge quiz

It's time to put what you've learned to the test, get 6 right to pass this unit.

Which keyword can we use to define a variable that cannot change its value at runtime?

Choose the correct answer.

const

var

let

What is true about object-oriented programming in JavaScript?

There are three correct answers.

Methods are functions that are associated with an object.

In JavaScript, each object has a prototype object, which acts as a template object from which it inherits methods and properties.

In JavaScript, each object has a prototype object, which acts as a template object from which it inherits methods and properties. An object’s prototype object may also have a prototype object, from which it inherits methods and properties, and so on. This is often referred to as a prototype chain.

JavaScript supports polymorphism in the traditional sense due to lack of type-checking, it can achieve a similar outcome because it's dynamically typed.

In which environment can JavaScript be used ?

Choose the correct answer.

Client

Server

Client and Server

Which of the following is true for JavaScript?

There are three correct answers.

Handle user events, such as clicks, scrolls, and keyboard input, to create responsive and interactive web applications.

Create visually appealing animations and transitions to enhance the overall look and feel of your website.

Utilize libraries and frameworks like jQuery, React, Angular, and Vue.js to simplify and streamline the development process.

Prevent asynchronous operations

Which of the following data types are primitive types in JavaScript?

There are three correct answers.

Boolean

Null

String

Object

What are the advantages of asynchronous operations in JavaScript?

There are three correct answers.

Asynchronous JavaScript allows JavaScript code to be executed in a non-blocking manner.

By not blocking the browser, user interactions, such as button clicks, scroll events, or text inputs, can be handled instantly, regardless of any heavy background operations happening simultaneously.

Asynchronous JavaScript is key to implementing real-time updates in web applications.

It is not possible to execute multiple operations at the same time.

How do you define a Immediately Invoked Function Expression?

Choose the correct answer.

(function() { // statements })();

function() { // statements })();

(function() // statements })();