[Solved] You want to declare an interface IVehicle with two methods: Start() and Stop(). Which of the following is the correct way to declare it and implement it in a class Car? | C Sharp (C#)

C Sharp (C#) - Interfaces

You want to declare an interface IVehicle with two methods: Start() and Stop(). Which of the following is the correct way to declare it and implement it in a class Car?

Ainterface IVehicle { void Start(); void Stop(); } class Car { public void Start() { } public void Stop() { } }

Binterface IVehicle { void Start() {} void Stop() {} } class Car : IVehicle { }

Cinterface IVehicle { void Start(); void Stop(); } class Car : IVehicle { public void Start() { Console.WriteLine("Car started"); } public void Stop() { Console.WriteLine("Car stopped"); } }

Dinterface IVehicle { void Start(); void Stop(); } class Car : IVehicle { void Start() { } void Stop() { } }

Step-by-Step Solution

Solution:

Step 1: Declare interface with method signatures only
IVehicle must declare Start() and Stop() without bodies.
Step 2: Implement interface methods publicly in class
Car must implement both methods with public access and provide method bodies.
Step 3: Check other options for errors
interface IVehicle { void Start() {} void Stop() {} } class Car : IVehicle { } has method bodies in interface (invalid). interface IVehicle { void Start(); void Stop(); } class Car { public void Start() { } public void Stop() { } } does not implement interface. interface IVehicle { void Start(); void Stop(); } class Car : IVehicle { void Start() { } void Stop() { } } implements methods but lacks public modifier, causing error.
Final Answer:
Correct interface and class implementation with public methods -> Option C
Quick Check:
Interface methods declared; class implements publicly [OK]

Quick Trick: Interface methods need public implementation in classes [OK]

Common Mistakes:

MISTAKES

Adding method bodies inside interface
Not implementing interface in class
Omitting public modifier in class methods

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More C Sharp (C#) Quizzes

You want to declare an interface IVehicle with two methods: Start() and Stop(). Which of the following is the correct way to declare it and implement it in a class Car?

Step 1: Declare interface with method signatures only

Step 2: Implement interface methods publicly in class

Step 3: Check other options for errors

Final Answer:

Quick Check:

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