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Can you explain polymorphism from Lecture 5?
Certainly! Based on Lecture 5 (slides 12-15) and the recorded lecture at 23:45, polymorphism is a fundamental concept in object-oriented programming where:
Definition: A single interface can represent different underlying forms (data types).
Types:
Compile-time: Method overloading
Run-time: Method overriding
Example: An Animal class with a makeSound() method that behaves differently for Dog and Cat subclasses.
Key Insight
Polymorphism allows you to write more flexible and reusable code by treating objects of different classes the same way.
Can you create a summary of inheritance vs composition?
Inheritance vs Composition
Aspect
Inheritance
Composition
Relationship
"is-a"
"has-a"
Flexibility
Less flexible (compile-time)
More flexible (run-time)
Code Reuse
White-box reuse
Black-box reuse
When to Use
True hierarchical relationships
Sharing functionality without hierarchy
Common Mistake
Students often overuse inheritance when composition would be more appropriate, leading to fragile class hierarchies.
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