[Solved] What must a Java class do when it implements an interface? — Ans: Provide implementations for all interface methods | Java

Java - Interfaces

What must a Java class do when it implements an interface?

AExtend the interface as a superclass

BProvide implementations for all interface methods

CDeclare the interface methods as private

DCreate objects of the interface

Step-by-Step Solution

Solution:

Step 1: Understand interface contract
Interfaces define method signatures without bodies, so implementing classes must provide method bodies.
Step 2: Implement all interface methods
The class must implement all methods declared in the interface to fulfill the contract.
Final Answer:
Provide implementations for all interface methods -> Option B
Quick Check:
Implementing interface = Provide all methods [OK]

Quick Trick: Implement all interface methods to avoid errors [OK]

Common Mistakes:

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