JConnect Infotech Interview Questions and Answers

Interface is a contract that defines the methods a class must implement, while abstract class can have both implemented and abstract methods.

• Interface can only have abstract methods and constants, while abstract class can have both abstract and implemented methods.

• A class can implement multiple interfaces but can only inherit from one abstract class.

• Interfaces are used to achieve multiple inheritance in Java, while abs...read more

A constructor is a special type of method that is used to initialize objects in a class.

• Constructors have the same name as the class they belong to.

• They do not have a return type.

• They are called automatically when an object is created.

• Constructors can have parameters to initialize object properties.

• Example: public class Car { public Car(String color) { this.color = color; } }