[Solved] Consider the following C# code:class Animal { public virtual string Speak() => "..."; }class Dog :... }Animal a = new Dog();Console.WriteLine(a.Speak());What is the output? | C Sharp (C#)

C Sharp (C#) - Polymorphism and Abstract Classes

Consider the following C# code:

class Animal { public virtual string Speak() => "..."; }
class Dog : Animal { public override string Speak() => "Woof"; }
class Cat : Animal { public override string Speak() => "Meow"; }

Animal a = new Dog();
Console.WriteLine(a.Speak());

What is the output?

AWoof

B...

CMeow

DCompilation error

Step-by-Step Solution

Solution:

Step 1: Understand polymorphism with virtual and override
The variable 'a' is of type Animal but holds a Dog object. The Speak method is virtual and overridden in Dog.
Step 2: Determine which Speak method runs
At runtime, the Dog's Speak method runs, returning "Woof".
Final Answer:
Woof -> Option A
Quick Check:
Virtual method calls overridden version [OK]

Quick Trick: Virtual method calls override in actual object type [OK]

Common Mistakes:

MISTAKES

Expecting base class method output
Confusing variable type with object type
Thinking code causes compile error

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More C Sharp (C#) Quizzes

Consider the following C# code:

Step 1: Understand polymorphism with virtual and override

Step 2: Determine which Speak method runs

Final Answer:

Quick Check:

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