Learn Java from Scratch - A Beginner's Guide - Step 08 - Object Is at Top of Inheritance Hierarchy

The video explains the concept of inheritance in Java, focusing on how every class that does not explicitly extend another class automatically extends the Object class. This is demonstrated using a Person class example, showing how methods like equals, hashCode, and toString are inherited from the Object class. The video also covers how the toString method is used when printing objects and concludes with a brief mention of method overriding, which will be discussed in the next video.

What happens to a class in Java if it does not explicitly extend another class?

• It becomes an abstract class.

• It automatically extends the Object class.

• It cannot be instantiated.

• It becomes a final class.

Which of the following methods is NOT inherited from the Object class?

• equals

• notify

• hashCode

• getName

What is the role of the Object class in Java's class hierarchy?

• It is a class for handling exceptions.

• It is a utility class for string operations.

• It is used only for arrays.

• It is the base class for all classes.

When you print an object in Java, which method is called internally?

• toString

• hashCode

• notify

• equals

Which method is commonly overridden to provide a custom string representation of an object?

• notify

• equals

• hashCode

• toString