Additional Notes
Understanding Interfaces and Abstract Classes?
Track: Java
Topic: Engineering Interviews
Focus: JVM Trivia
Java: JVM Trivia
Answer
Interfaces allow multiple inheritance, abstract classes do not.
Interfaces are used to define a contract that other classes can implement. They allow a class to inherit multiple behaviors. Abstract classes provide a common base with partial implementation, but a class can only extend one abstract class. For example, an e-commerce project might use an interface for payment methods to support multiple payment gateways, while an abstract class could establish a base for different types of users with shared code.
Interfaces are used to define a contract that other classes can implement. They allow a class to inherit multiple behaviors. Abstract classes provide a common base with partial implementation, but a class can only extend one abstract class. For example, an e-commerce project might use an interface for payment methods to support multiple payment gateways, while an abstract class could establish a base for different types of users with shared code.
Topics: Engineering Interviews Java JVM Trivia