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You have a list of Animal objects, some are Dogs and some are Cats. How can polymorphism help you call the correct Speak method for each animal without checking their types?

hard🚀 Application Q8 of Q15

C Sharp (C#) - Polymorphism and Abstract Classes

You have a list of Animal objects, some are Dogs and some are Cats. How can polymorphism help you call the correct Speak method for each animal without checking their types?

ABy using if-else statements to check each animal type

BBy making Speak a static method in Animal

CBy casting all animals to Dog before calling Speak

DBy declaring Speak as virtual in Animal and overriding in Dog and Cat

Step-by-Step Solution

Solution:

Step 1: Understand polymorphic method calls
Declaring Speak as virtual in base class and overriding in derived classes allows calling correct method via base reference.
Step 2: Avoid type checking
This removes need for if-else or casting, simplifying code and improving flexibility.
Final Answer:
By declaring Speak as virtual in Animal and overriding in Dog and Cat -> Option D
Quick Check:
Virtual + override enables automatic correct method calls [OK]

Quick Trick: Virtual + override calls correct method without type checks [OK]

Common Mistakes:

MISTAKES

Using type checks instead of polymorphism
Casting incorrectly causing runtime errors
Making methods static which disables polymorphism

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