1. Which of the following is a feature of object-oriented programming?
A. Data is hidden
B. Data is manipulated directly
C. Functions are not used
D. Programs are written in a procedural way
Answer: A) Data is hidden
Rationale: One of the key features of OOP is data encapsulation, which means data
is hidden from outside access and can only be accessed through public methods.
2. What is the main purpose of inheritance in object-oriented programming?
A. To allow data encapsulation
B. To reuse code in derived classes
C. To hide data
D. To implement multiple threads
Answer: B) To reuse code in derived classes
,Rationale: Inheritance allows a class to inherit properties and behaviors (methods)
from another class, promoting code reuse.
3. Which of the following best describes a class in object-oriented programming?
A. A function that performs tasks
B. A template for creating objects
C. A variable used to store data
D. A process used to execute instructions
Answer: B) A template for creating objects
Rationale: A class defines the blueprint or template from which objects are
instantiated.
4. What does the term "polymorphism" in object-oriented programming refer to?
A. Objects take multiple forms
B. The ability to hide data
C. The reuse of code
D. The process of creating a new class from an existing class
Answer: A) Objects take multiple forms
, Rationale: Polymorphism allows objects to take on different forms, typically
through method overloading or method overriding.
5. Which of the following is an example of method overloading?
A. A method with the same name but different parameters
B. A method that changes its behavior based on the object type
C. A method that calls another method
D. A method that throws an exception
Answer: A) A method with the same name but different parameters
Rationale: Method overloading occurs when multiple methods with the same name
exist but with different parameter lists.
6. What is encapsulation in object-oriented programming?
A. The process of hiding data and only exposing necessary functionality
B. The process of creating new objects from a class
C. The ability of an object to take multiple forms
D. The inheritance of properties and methods from a parent class
Answer: A) The process of hiding data and only exposing necessary functionality
A. Data is hidden
B. Data is manipulated directly
C. Functions are not used
D. Programs are written in a procedural way
Answer: A) Data is hidden
Rationale: One of the key features of OOP is data encapsulation, which means data
is hidden from outside access and can only be accessed through public methods.
2. What is the main purpose of inheritance in object-oriented programming?
A. To allow data encapsulation
B. To reuse code in derived classes
C. To hide data
D. To implement multiple threads
Answer: B) To reuse code in derived classes
,Rationale: Inheritance allows a class to inherit properties and behaviors (methods)
from another class, promoting code reuse.
3. Which of the following best describes a class in object-oriented programming?
A. A function that performs tasks
B. A template for creating objects
C. A variable used to store data
D. A process used to execute instructions
Answer: B) A template for creating objects
Rationale: A class defines the blueprint or template from which objects are
instantiated.
4. What does the term "polymorphism" in object-oriented programming refer to?
A. Objects take multiple forms
B. The ability to hide data
C. The reuse of code
D. The process of creating a new class from an existing class
Answer: A) Objects take multiple forms
, Rationale: Polymorphism allows objects to take on different forms, typically
through method overloading or method overriding.
5. Which of the following is an example of method overloading?
A. A method with the same name but different parameters
B. A method that changes its behavior based on the object type
C. A method that calls another method
D. A method that throws an exception
Answer: A) A method with the same name but different parameters
Rationale: Method overloading occurs when multiple methods with the same name
exist but with different parameter lists.
6. What is encapsulation in object-oriented programming?
A. The process of hiding data and only exposing necessary functionality
B. The process of creating new objects from a class
C. The ability of an object to take multiple forms
D. The inheritance of properties and methods from a parent class
Answer: A) The process of hiding data and only exposing necessary functionality
