Practice Cheatsheets Programming FAQs Mock Test Random Topics Saved

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Object Oriented Programming - Core Java Practice Questions and Answers

Practice/Core Java/Object Oriented Programming

Object Oriented ProgrammingPractice Questions

Improve your understanding of Object Oriented Programming with comprehensive practice questions, clear explanations, and AI-powered guidance from Core Java Topic.

11

Question 11 of 15

What is the primary role of a constructor in OOP?

To destroy objects

To initialize newly created objects

To allocate memory for files

To overload operators

12

Question 12 of 15

Which statement about constructors is generally true?

They must have a return type

Their name can be anything

Their name is same as the class name

They can be static methods

13

Question 13 of 15

Which relationship is represented by “HAS-A”?

Inheritance

Polymorphism

Abstraction

Composition/Aggregation

14

Question 14 of 15

Which of the following practices tends to increase coupling between classes the most?

Using interfaces

Using well-defined abstract classes

Using dependency injection

Using many public fields directly

15

Question 15 of 15

Which principle states that “a class should have only one reason to change”?

Single Responsibility Principle

Liskov Substitution Principle

Interface Segregation Principle

Open/Closed Principle