[Solved] You want to design a Java class hierarchy for different types of employees: Manager, Developer, and Intern.... Which OOP principle helps you avoid repeating code for name and salary in each class? | Java

Java - Object-Oriented Programming Concepts

You want to design a Java class hierarchy for different types of employees: Manager, Developer, and Intern. All employees have a name and salary, but only Managers have a bonus. Which OOP principle helps you avoid repeating code for name and salary in each class?

AAbstraction

BEncapsulation

CPolymorphism

DInheritance

Step-by-Step Solution

Solution:

Step 1: Identify common features
Name and salary are common to all employee types, so they should be in a shared base class.
Step 2: Apply OOP principle to reuse code
Inheritance allows subclasses (Manager, Developer, Intern) to reuse code from a parent Employee class, avoiding repetition.
Final Answer:
Inheritance -> Option D
Quick Check:
Inheritance = reuse common code in subclasses [OK]

Quick Trick: Use inheritance to share common features [OK]

Common Mistakes:

Confusing encapsulation with code reuse
Thinking polymorphism avoids code repetition
Assuming abstraction handles code reuse

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More Java Quizzes

Which OOP principle helps you avoid repeating code for name and salary in each class?

Step 1: Identify common features

Step 2: Apply OOP principle to reuse code

Final Answer:

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