JavaScript Masterclass - Zero to Job-Ready with Hands-On Projects - Built-in Methods

The video tutorial explains JavaScript's built-in methods and prototypes, focusing on arrays and objects. It covers inheritance, demonstrating how arrays inherit from objects and how XMLHttpRequest has its own prototype chain. The tutorial also clarifies method execution in JavaScript, emphasizing that methods can be called directly without specifying prototypes. The session concludes with a discussion on object-oriented programming in JavaScript.

What is the primary purpose of prototypes in JavaScript?

• To define the structure of a class

• To execute functions asynchronously

• To enable inheritance of properties and methods

• To store data in arrays

What is the relationship between an array and an object in JavaScript?

• Arrays and objects are completely unrelated

• Arrays are a type of object and inherit from the object prototype

• Arrays inherit from the function prototype

• Objects are a type of array and inherit from the array prototype

Which of the following statements is true about the inheritance hierarchy in JavaScript?

• Every object in JavaScript directly inherits from the array prototype

• The ultimate parent of all objects in JavaScript is the object prototype

• XML HTTP requests do not have a parent prototype

• Inheritance in JavaScript is only applicable to functions

Why is it said that everything in JavaScript is an object?

• Because all data types are stored as objects

• Because all prototypes ultimately inherit from the object prototype

• Because JavaScript only supports object-oriented programming

• Because functions cannot exist without objects

How does JavaScript allow you to call methods on objects?

• By explicitly referencing the prototype

• By importing the method from a library

• By using the 'new' keyword

• By directly calling the method on the object