[Solved] Which scenario best shows why interfaces are useful? - Ans: When unrelated classes need to implement the same methods | C Sharp (C#)

C Sharp (C#) - Interfaces

Which scenario best shows why interfaces are useful?

AWhen you want to hide all methods from other classes

BWhen you want to create a new data type with variables

CWhen you want to inherit code from a base class

DWhen unrelated classes need to implement the same methods

Step-by-Step Solution

Solution:

Step 1: Identify interface use case
Interfaces allow unrelated classes to implement the same methods, ensuring consistency.
Step 2: Eliminate other options
Interfaces do not create data types with variables, inherit code, or hide methods.
Final Answer:
When unrelated classes need to implement the same methods -> Option D
Quick Check:
Interface use case = Unrelated classes share methods [OK]

Quick Trick: Interfaces unify method signatures across different classes [OK]

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Which scenario best shows why interfaces are useful?