Senior Full Stack Software Developer Interview Questions and Answers

Interfaces are pure abstract classes while abstract classes can have concrete methods.

• Interfaces cannot have any implementation while abstract classes can have some implementation.

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

• Interfaces are used for achieving multiple inheritance in Java.

• Abstract classes can have constructors while interfaces cannot.

• Interfaces are used for defining contracts while abstract classes are used for defining...read more