[Solved] Given the interface and classes below, how would you write a method PerformWork that accepts any IWorker and calls its Work() method?interface IWorker { void Work(); } class Employee :... | C Sharp (C#)

C Sharp (C#) - Interfaces

Given the interface and classes below, how would you write a method PerformWork that accepts any IWorker and calls its Work() method?

interface IWorker { void Work(); }
class Employee : IWorker {
  public void Work() { Console.WriteLine("Employee working"); }
}
class Robot : IWorker {
  public void Work() { Console.WriteLine("Robot working"); }
}

Avoid PerformWork(IWorker worker) { worker.Work(); }

Bvoid PerformWork(Employee worker) { worker.Work(); }

Cvoid PerformWork(Robot worker) { worker.Work(); }

Dvoid PerformWork(object worker) { worker.Work(); }

Step-by-Step Solution

Solution:

Step 1: Use interface type as parameter
Method should accept IWorker to handle any implementing class.
Step 2: Call Work() method on interface reference
Calling worker.Work() invokes the correct implementation.
Final Answer:
void PerformWork(IWorker worker) { worker.Work(); } -> Option A
Quick Check:
Use interface type for polymorphic behavior. [OK]

Quick Trick: Use interface type to accept all implementations [OK]

Common Mistakes:

MISTAKES

Restricting parameter to concrete classes
Using object type without casting
Not calling Work() method

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More C Sharp (C#) Quizzes

Given the interface and classes below, how would you write a method PerformWork that accepts any IWorker and calls its Work() method?

Step 1: Use interface type as parameter

Step 2: Call Work() method on interface reference

Final Answer:

Quick Check:

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