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AP ECET COMPUTER SCIENCE AND ENGINEERING Multiple Choice Questions (MCQs)

MCQs for AP ECET - Object-Oriented Programming through C++

AP ECET - Object-Oriented Programming through C++ (Questions 106-120)

Which of the following is not a feature of Object-Oriented Programming (OOP)?
- a) Encapsulation
- b) Polymorphism
- c) Inheritance
- d) Assembly programming
Answer: d) Assembly programming
Which of the following is used to define a class in C++?
- a) class
- b) structure
- c) object
- d) function
Answer: a) class
Which of the following operators is used for dynamic memory allocation in C++?
- a) new
- b) malloc
- c) alloc
- d) new[]
Answer: a) new
In C++, which of the following is a type of constructor?
- a) Default constructor
- b) Parameterized constructor
- c) Copy constructor
- d) All of the above
Answer: d) All of the above
What is the purpose of the this pointer in C++?
- a) To refer to the current object
- b) To create a new object
- c) To access class members
- d) To refer to base class object
Answer: a) To refer to the current object
What does the destructor in C++ do?
- a) Initializes object
- b) Destroys object when it goes out of scope
- c) Creates object
- d) None of the above
Answer: b) Destroys object when it goes out of scope
Which of the following operators can be overloaded in C++?
- a) +
- b) =
- c) []
- d) All of the above
Answer: d) All of the above
What is inheritance in C++?
- a) A process of creating an object
- b) A process of deriving new class from an existing class
- c) A process of overloading functions
- d) A process of destroying objects
Answer: b) A process of deriving new class from an existing class
Which of the following is true about virtual functions in C++?
- a) A virtual function can be overridden in a derived class
- b) A virtual function cannot be overloaded
- c) A virtual function must be declared as private
- d) Virtual functions do not support dynamic polymorphism
Answer: a) A virtual function can be overridden in a derived class
Which function is used to read data from a file in C++?
- a) cin
- b) scanf()
- c) get()
- d) ifstream::read()
Answer: d) ifstream::read()
What is the purpose of a template in C++?
- a) To define a function or class that works with any data type
- b) To create an abstract class
- c) To overload operators
- d) To create a function with default arguments
Answer: a) To define a function or class that works with any data type
Which of the following is used for operator overloading in C++?
- a) operator
- b) new
- c) function
- d) class
Answer: a) operator
Which of the following is the correct way to declare a function that returns a reference to an integer in C++?
- a) int &function()
- b) int function()&
- c) function() int&
- d) reference int function()
Answer: a) int &function()

What is the output of the following C++ code?

                class Test {
                public:
                    void display() {
                        cout << "Hello, World!";
                    }
                };

                int main() {
                    Test obj;
                    obj.display();
                    return 0;
                }

a) Error in code
b) "Hello, World!"
c) "World! Hello"
d) "Hello"

Answer: b) "Hello, World!"

What will happen if we try to delete a pointer that was not created using new?
- a) Memory will be freed
- b) Runtime error
- c) The program will crash
- d) Nothing will happen
Answer: b) Runtime error

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AP ECET COMPUTER SCIENCE AND ENGINEERING Multiple Choice Questions (MCQs)

AP ECET - Object-Oriented Programming through C++ (Questions 106-120)

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