Imaginnovate Java Developer Interview Questions, Process, and Tips

Constructors are used to initialize objects in Java.

• Constructors are special methods that have the same name as the class.

• They are used to allocate memory for an object and initialize its state.

• Constructors can have parameters to initialize object properties.

• They are called automatically when an object is created using the 'new' keyword.

• Constructors can be overloaded to create objects with different initial states.

An interface in Java is a blueprint of a class that defines a set of methods without implementation.

• An interface can have abstract methods, default methods, and static methods.

• It is used to achieve abstraction and multiple inheritance in Java.

• Classes implement interfaces using the 'implements' keyword.

• Interfaces can be used to create loosely coupled systems and promote code reusability.

• Example: 'Comparable' interface i...read more

Extend is used to inherit properties and methods from a class, while implement is used to implement interfaces.

• Extend is used to create a subclass that inherits properties and methods from a superclass.

• Implement is used to define a class that implements the methods declared in an interface.

• A class can extend only one superclass, but it can implement multiple interfaces.

• Extend is used for inheritance, while implement is