[Solved] What happens if a class implements two interfaces that have the same default method signature? — Ans: The class must override the default method to resolve the conflict. | Java

Java - Interfaces

What happens if a class implements two interfaces that have the same default method signature?

AThe compiler automatically merges both default methods.

BThe class must override the default method to resolve the conflict.

CThe class inherits both default methods without any error.

DThe class inherits the default method from the first interface only.

Step-by-Step Solution

Solution:

Step 1: Understand multiple inheritance of default methods
When two interfaces have the same default method, the implementing class faces a conflict.
Step 2: Resolve conflict by overriding
The class must provide its own implementation to avoid ambiguity.
Final Answer:
The class must override the default method to resolve the conflict. -> Option B
Quick Check:
Conflict resolution = Override method [OK]

Quick Trick: Override conflicting default methods to avoid errors [OK]

Common Mistakes:

Master "Interfaces" in Java

9 interactive learning modes - each teaches the same concept differently

More Java Quizzes

What happens if a class implements two interfaces that have the same default method signature?