Free Test Concepts of Object-Ori... – C++ Lan...

Q1: Which of the following is NOT a basic concept of OOP?

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

Q2: What does encapsulation mean in OOP?

A. Hiding data and methods inside a class B. Multiple functions with same name C. Deriving new classes from old ones D. Using base and derived classes

Q3: Which feature allows using the same function name with different parameters?

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

Q4: Inheritance in OOP allows:

A. Creating new classes from existing classes B. Hiding data members C. Defining multiple functions D. Declaring variables

Q5: Abstraction in OOP means:

A. Hiding complex implementation details B. Using multiple inheritance C. Declaring classes public D. Using pointers

Q6: Which of the following represents a class?

A. Blueprint for objects B. Specific instance of data C. Function overloading D. Memory allocation

Q7: An object in OOP is:

A. Instance of a class B. A function C. A variable D. A data type

Q8: Which keyword is used to define a class in C++?

A. class B. object C. struct D. define

Q9: What is a constructor?

A. A special function to initialize objects B. A function to destroy objects C. A function to overload operators D. A function to call other functions

Q10: What is a destructor?

A. A function to clean up before object is destroyed B. A function to create objects C. A function for inheritance D. A function for operator overloading

Q11: Which access specifier allows members to be accessed only inside the class?

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

Q12: Which access specifier allows members to be accessed from anywhere?

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

Q13: Which feature allows a class to use another class's properties?

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

Q14: Which of the following is true about polymorphism?

A. It enables a function to behave differently based on arguments B. It hides data C. It is only available in procedural programming D. It restricts access to members

Q15: Which OOP concept helps reduce complexity by hiding unnecessary details?

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

Q16: What does the keyword "this" refer to in a class?

A. The current object B. The class itself C. A pointer to base class D. A global object

Q17: Which of the following is NOT a benefit of OOP?

A. Improved code reusability B. Easier maintenance C. Less memory usage always D. Better modularity

Q18: What is the difference between class and struct in C++?

A. Class members are private by default, struct members are public B. Class members are public by default, struct members are private C. No difference D. Struct cannot have functions

Q19: Which of the following is an example of polymorphism?

A. Function overloading B. Variable declaration C. Class definition D. Pointer usage

Quiz for Concepts of Object-Oriented Programming (OOP)