You want to design a system where some methods have default behavior but others must be defined by subclasses. Which approach best uses partial abstraction?

hard📝 Application Q8 of 15

Java - Abstraction

ACreate a concrete class with all methods implemented

BCreate an abstract class with some concrete methods and some abstract methods

CCreate an interface with all methods abstract

DCreate multiple interfaces and implement all methods in subclasses

Step-by-Step Solution

Solution:

Step 1: Understand requirement for default and mandatory methods
Partial abstraction allows some methods with code and some abstract to force subclass implementation.
Step 2: Match approach to requirement
Abstract class with concrete and abstract methods fits best.
Final Answer:
Create an abstract class with some concrete methods and some abstract methods -> Option B
Quick Check:
Partial abstraction = abstract class with mixed methods [OK]

Quick Trick: Use abstract class with some methods implemented, others abstract [OK]

Common Mistakes:

Using interface only (full abstraction)
Using concrete class only (no abstraction)
Implementing all methods in subclasses unnecessarily

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More Java Quizzes

You want to design a system where some methods have default behavior but others must be defined by subclasses. Which approach best uses partial abstraction?

Step 1: Understand requirement for default and mandatory methods

Step 2: Match approach to requirement

Final Answer:

Quick Check:

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