Object Oriented Programming MCQs with Answers
Practice important Object Oriented Programming MCQs with answers and explanations.
Chapter: 2
Q21:
What is the primary benefit of Information Hiding?
A. It increases complexity
B. It simplifies the model
C. It requires more code
D. It makes objects more accessible
Correct Answer:
B
Chapter: 2
Q22:
What concept ensures that only necessary details of an object are visible and implementation details are hidden?
A. Encapsulation
B. Information Hiding
C. Inheritance
D. Polymorphism
Correct Answer:
B
Chapter: 2
Q23:
Which of the following is an example of encapsulation?
A. A phone’s internal data and its ability to show information to users
B. A database schema and its data
C. A public API and its private methods
D. A compiler and its source code
Correct Answer:
A
Chapter: 2
Q24:
What does the interface of an object provide?
A. The actual implementation details
B. A set of functions that can be used by other objects
C. The internal state of the object
D. The class definition
Correct Answer:
B
Chapter: 2
Q25:
Which part of the implementation includes the data structures and functionality of an object?
A. Interface
B. Abstraction
C. Implementation
D. Encapsulation
Correct Answer:
C
Chapter: 2
Q26:
What does the separation of interface and implementation allow?
A. It combines the interface with the implementation
B. It hides implementation details while exposing a consistent interface
C. It merges the interface and implementation
D. It simplifies the implementation details
Correct Answer:
B
Chapter: 2
Q27:
Which of the following is NOT a real-life example of information hiding?
A. Ali’s personal information stored in his brain
B. An email server hiding account information
C. A car’s engine details visible to everyone
D. A phone’s SIM card data hidden from users
Correct Answer:
C
Chapter: 2
Q28:
Information hiding in Object-Oriented Programming is achieved using __________ and Abstraction.
A. Polymorphism
B. Encapsulation
C. Inheritance
D. Generic Programming
Correct Answer:
B
Chapter: 2
Q29:
An object’s __________ provides a list of functions that other objects can use to interact with it.
A. Data Structure
B. Interface
C. State
D. Behavior
Correct Answer:
B
Chapter: 2
Q30:
Encapsulation ensures that all data and functions related to an object are __________ inside the object.
A. Visible
B. Hidden
C. Shared
D. Separated
Correct Answer:
B
Chapter: 2
Q31:
The actual implementation of an object's behavior is known as __________.
A. Interface
B. Implementation
C. Encapsulation
D. Data Structure
Correct Answer:
B
Chapter: 2
Q32:
The concept of __________ allows different objects to communicate by sending messages.
A. Information Hiding
B. Encapsulation
C. Polymorphism
D. Separation of Interface and Implementation
Correct Answer:
C
Chapter: 2
Q33:
An example of __________ is a phone that hides its internal data but provides functions to interact with it.
A. Implementation
B. Encapsulation
C. Interface
D. Abstraction
Correct Answer:
B
Chapter: 2
Q34:
The __________ principle allows a driver to use the standard interface of any car regardless of its internal details.
A. Encapsulation
B. Information Hiding
C. Separation of Interface and Implementation
D. Polymorphism
Correct Answer:
C
Chapter: 2
Q35:
In Object-Oriented Programming, __________ are used to send stimuli to objects to invoke their operations.
A. Messages
B. Attributes
C. Methods
D. States
Correct Answer:
A
Chapter: 3
Q36:
What principle involves focusing only on the relevant details of an object for a specific problem?
A. Encapsulation
B. Abstraction
C. Inheritance
D. Polymorphism
Correct Answer:
B
Chapter: 3
Q37:
In Object-Oriented Programming, what does a class represent?
A. An instance of an object
B. A general prototype or blueprint
C. A specific object's state
D. A method in a class
Correct Answer:
B
Chapter: 3
Q38:
Which of the following is an advantage of abstraction?
A. It increases complexity
B. It simplifies understanding and solving a problem
C. It requires detailed implementation
D. It combines multiple perspectives
Correct Answer:
B
Chapter: 3
Q39:
Inheritance allows a derived class to inherit characteristics from a ______ class.
A. Base
B. Child
C. Subordinate
D. Main
Correct Answer:
A
Chapter: 3
Q40:
Which of the following is an example of inheritance?
A. A car inheriting features from a vehicle class
B. A student class having attributes like roll number and CGPA
C. A method within a class
D. A class with a single attribute
Correct Answer:
B