[Solved] What will be the output of this code?interface IGreet { void SayHello(); }class Person : IGreet { public void SayHello() { Console.WriteLine("Hi!"); }}var p = new Person();p.SayHello(); | C Sharp (C#)

C Sharp (C#) - Interfaces

What will be the output of this code?

interface IGreet { void SayHello(); }
class Person : IGreet {
  public void SayHello() { Console.WriteLine("Hi!"); }
}
var p = new Person();
p.SayHello();

ANo output

BSayHello

CHi!

DCompile error

Step-by-Step Solution

Solution:

Step 1: Understand interface and class
The interface IGreet requires SayHello method. Person implements it by printing "Hi!".
Step 2: Trace code execution
Creating Person object and calling SayHello prints "Hi!" to console.
Final Answer:
Hi! -> Option C
Quick Check:
Implemented method runs and prints output [OK]

Quick Trick: Implemented method runs exactly as coded in class [OK]

Common Mistakes:

MISTAKES

Expecting method name printed instead of output
Thinking interface prints output
Assuming compile error without method body

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What will be the output of this code?

Step 1: Understand interface and class

Step 2: Trace code execution

Final Answer:

Quick Check:

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