Which Ruby expression correctly checks if Cat is a subclass of Animal?

easy📝 Conceptual Q2 of 15

Ruby - Inheritance

Which Ruby expression correctly checks if Cat is a subclass of Animal?

ACat <= Animal

BAnimal < Cat

CCat > Animal

DCat < Animal

Step-by-Step Solution

Solution:

Step 1: Recall subclass check syntax
In Ruby, Child < Parent returns true if Child is subclass of Parent.
Step 2: Apply to Cat and Animal
Since Cat inherits from Animal, Cat < Animal is correct.
Final Answer:
Cat < Animal -> Option D
Quick Check:
Subclass check = Child < Parent [OK]

Quick Trick: Subclass check uses < with child on left [OK]

Common Mistakes:

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