JAVA INTERVIEW QUESTION REVISION

1 DIFF B/W INTERFACE AND ABSTRACT

Feature	Interface	Abstract Class
Purpose	Defines a contract	Provides partial abstraction + implementation
Methods	Mostly abstract methods (Java 8+: default & static allowed)	Can have abstract + concrete methods
Variables	Only public static final (constants)	Can have instance variables
Constructor	❌ Not allowed	✅ Allowed
Inheritance	Class can implement multiple interfaces	Class can extend only one abstract class
Access Modifiers	Methods are public by default	Methods can have any access modifier
Keyword used	implements	extends

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