C Sharp (C#) - Interfaces
You want to add a new method to an existing interface without breaking existing implementations. How can default interface methods help?
You want to add a new method to an existing interface without breaking existing implementations. How can default interface methods help?
hard🚀 Application Q8 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand interface versioning problem
Adding new methods to interfaces usually breaks existing classes that don't implement them.Step 2: Use default interface methods to solve this
Providing a default implementation allows existing classes to continue working without changes.Final Answer:
By providing a default implementation, existing classes don't need to implement the new method. -> Option BQuick Check:
Default methods enable interface evolution = C [OK]
Quick Trick: Default methods prevent breaking changes in interfaces [OK]
Common Mistakes:
MISTAKES- Thinking all classes must update immediately
- Believing interfaces can remove methods safely
- Confusing abstract interfaces with default methods
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