Object-Oriented Programming Quiz

What OOP principle is at play when internal class data is shielded from direct access and exposed via controlled interfaces?

• Inheritance

• Encapsulation

• Polymorphism

• Abstraction

Why do game developers lean on OOP when building characters and interactive elements?

• It streamlines database queries

• It enables modular, reusable entities like players and enemies

• It boosts GPU performance

• It simplifies statistical modeling

In a payment system, how does polymorphism simplify handling multiple transaction types?

• It authenticates users

• It allows one interface to process various payment methods

• It structures the database

• It optimizes device drivers

Which statement best captures the distinction between abstraction and encapsulation?

• Abstraction is built using encapsulation

• Encapsulation is a subset of abstraction

• They operate independently

• Encapsulation conceals implementation; abstraction conceals complexity

How would you describe the link between a class and an object?

• A class is an object's instance

• An object defines a class

• A class outlines the blueprint; an object is the result

• They're interchangeable

What's the main advantage of inheritance in object-oriented design?

• It hides internal logic

• It promotes code reuse and hierarchical relationships

• It limits data access

• It enables global variables

Which scenario showcases polymorphism in action?

• Declaring private fields

• Overriding a method in a subclass

• Writing a constructor

• Defining a class

What does encapsulation contribute to software architecture?

• Speed optimization

• Data security and modular structure

• Universal variable access

• Removal of inheritance

Which concept allows developers to focus on essential behavior while hiding internal mechanics?

• Inheritance

• Encapsulation

• Abstraction

• Polymorphism

Which keyword is typically used to enforce encapsulation in class design?

• public

• static

• private

• abstract