You want to design a system where all vehicles must have a method StartEngine(), but the way engines start differs by vehicle type. Which approach is best in C#?
hard🚀 Application Q15 of Q15
C Sharp (C#) - Polymorphism and Abstract Classes
You want to design a system where all vehicles must have a method StartEngine(), but the way engines start differs by vehicle type. Which approach is best in C#?
ACreate a static class Vehicle with static StartEngine() method.
BCreate a concrete class Vehicle with a fully implemented StartEngine() method for all vehicles.
CUse an interface with a concrete StartEngine() method and inherit it in all vehicle classes.
DCreate an abstract class Vehicle with abstract method StartEngine(), then implement it in subclasses.
Step-by-Step Solution
Solution:
Step 1: Analyze requirement for different implementations
Since StartEngine() differs by vehicle type, it should be declared abstract to force subclasses to provide their own version.
Step 2: Choose correct class design
An abstract class Vehicle with an abstract StartEngine() method fits best, allowing subclasses to implement specific behavior.
Final Answer:
Create an abstract class Vehicle with abstract method StartEngine(), then implement it in subclasses. -> Option D
Quick Check:
Abstract class for common plan, concrete for specifics [OK]
Quick Trick:Abstract method for varying behavior, concrete class for details [OK]
Common Mistakes:
MISTAKES
Using concrete class with one method for all vehicles
Trying to put method body in interface (not allowed)
Using static class which can't be inherited
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