Quiz for Abstraction and Encapsulation

Course: JAVA | Subject: Java | Topic: Object-Oriented Programming (OOP)

Q1: What is abstraction in Java?

A. Hiding implementation details and showing only functionality B. Restricting access to variables C. Writing clean code D. Using interfaces only

Q2: Which keyword is used to define an abstract class?

A. abstract B. interface C. virtual D. class

Q3: What is encapsulation in Java?

A. Binding code and data together B. Hiding object identity C. Inheriting properties from a class D. Writing loops inside classes

Q4: Which access modifier provides the highest level of encapsulation?

A. public B. private C. protected D. default

Q5: Can we create an object of an abstract class?

A. Yes B. No C. Only in interfaces D. Yes, if final

Q6: Which of the following enforces abstraction?

A. Interfaces B. Static methods C. Constructors D. final variables

Q7: Which principle hides internal object details?

A. Inheritance B. Polymorphism C. Abstraction D. Encapsulation

Q8: Which of the following is NOT true about encapsulation?

A. Encapsulation improves maintainability B. Encapsulation helps in data hiding C. Encapsulation allows direct field access D. Encapsulation uses access modifiers

Q9: Which access modifier is typically used with getters/setters?

A. private B. public C. protected D. static

Q10: Which keyword is used to define an abstract method?

A. void B. static C. abstract D. final

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