Quick study sessions to strengthen memory and retain key concepts.
Why should you carefully design class hierarchies?
Poor design can lead to rigid and complex systems. Designing class hierarchies requires careful consideration to avoid issues…
View Card →How would you explain the design impact of using final classes in an interview?
Prevents further subclassing, ensuring immutability and security. Marking a class as final in Java means it cannot be…
View Card →How would you explain a default method in an interface in an interview?
A method with a body in an interface. Frame the concept in practical terms so you can explain…
View Card →Why might you choose an abstract class over an interface?
To share code among related classes. Frame the concept in practical terms so you can explain it during…
View Card →How would you explain a common mistake in designing class hierarchies in an interview?
Creating too deep or broad hierarchies. Frame the concept in practical terms so you can explain it during…
View Card →How does polymorphism enhance flexibility?
Allows objects to be treated as instances of their parent class. Polymorphism enables a single interface to represent…
View Card →Why are interfaces preferred for multiple inheritance?
Interfaces allow multiple inheritance without ambiguity. Java does not support multiple inheritance with classes to avoid the diamond…
View Card →When should you prefer composition over inheritance?
When flexibility and loose coupling are needed. Composition involves building classes from other classes rather than inheriting from…
View Card →What does 'instanceof' check?
It checks if an object is an instance of a specific class or interface. The 'instanceof' operator checks…
View Card →How does method overriding work?
Subclasses provide specific implementations of superclass methods. Overriding allows a subclass to offer a specific implementation for a…
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