[Solved] Which of the following correctly defines a default method inside an interface in C#? - Ans: interface IExample { void Show() => Console.WriteLine("Hello"); } | C Sharp (C#)

C Sharp (C#) - Interfaces

Which of the following correctly defines a default method inside an interface in C#?

Ainterface IExample { void Show() => Console.WriteLine("Hello"); }

Binterface IExample { default void Show() { Console.WriteLine("Hello"); } }

Cinterface IExample { void Show(); default { Console.WriteLine("Hello"); } }

Dinterface IExample { void Show() { Console.WriteLine("Hello"); } }

Step-by-Step Solution

Solution:

Step 1: Understand default interface method syntax
In C#, default interface methods are declared by providing a method body directly inside the interface without the 'default' keyword.
Step 2: Analyze each option
interface IExample { void Show() => Console.WriteLine("Hello"); } correctly uses the expression-bodied method syntax inside the interface. interface IExample { default void Show() { Console.WriteLine("Hello"); } } incorrectly uses 'default' keyword which is not valid. interface IExample { void Show(); default { Console.WriteLine("Hello"); } } tries to separate declaration and body incorrectly. interface IExample { void Show() { Console.WriteLine("Hello"); } } attempts to define a method with a block body but without a semicolon, which is invalid in interfaces.
Final Answer:
Option A -> Option A
Quick Check:
Default interface methods require method body without 'default' keyword [OK]

Quick Trick: Default methods have bodies directly in interface [OK]

Common Mistakes:

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Which of the following correctly defines a default method inside an interface in C#?