Object Oriented Programming In C Plus Plus — Part 1 MCQs with Explanations

In C++, the keyword public is used to specify public inheritance when inheriting a class. When a class inherits another class publicly, all public members of the base class become public members of the derived class, and protected members of the base class become protected members of the derived class. The keywords private and protected can also be used for inheritance, but they specify different levels of access control: private inheritance : All public and protected members of the base class become private members of the derived class. protected inheritance : All public and protected members of the base class become protected members of the derived class. The keyword extends is used in languages like Java for inheritance, but not in C++. Therefore, the correct answer is public .

class is the correct answer to “Which keyword is used to define a class in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Instantiation is the correct answer to “What is the process of creating an instance of a class called in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

The process of deriving a new class from an existing class is the correct answer to “What is inheritance in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

public is the correct answer to “What is the access specifier that allows members to be accessed from outside the class in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Overloading is the correct answer to “Which concept in C++ allows a class to have multiple functions with the same name but different parameter lists”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

The bundling of data with the methods that operate on that data is the correct answer to “What is encapsulation in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

The ability of a function to perform different tasks based on the object that it is acting upon is the correct answer to “What is polymorphism in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

They are automatically called when an object is created is the correct answer to “Which of the following is true about constructors in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Encapsulation is the correct answer to “What is the process of wrapping data and functions into a single unit called in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

The ability of a function to perform different tasks based on the object that it is acting upon at runtime is the correct answer to “What is dynamic polymorphism in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

final is the correct answer to “Which keyword is used to specify that a function cannot be overridden in a derived class in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

A class that cannot be instantiated and is used as a base class for other classes is the correct answer to “What is an abstract class in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

To allow access to private and protected members of a class from outside the class is the correct answer to “What is the purpose of friend functions in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

protected is the correct answer to “What is the access specifier that allows members to be accessed only within the same class or by derived classes in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

A special member function that initializes objects is the correct answer to “What is a constructor in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

base is the correct answer to “Which keyword is used to access the base class members from a derived class in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Defining multiple functions with the same name but different arguments is the correct answer to “What is operator overloading in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

To clean up resources before an object is destroyed is the correct answer to “What is the purpose of a destructor in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

protected is the correct answer to “Which access specifier allows a member to be accessible only within its own class and derived classes in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Defining a function in the derived class with the same signature as in the base class is the correct answer to “What is function overriding in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

To create class-level variables and functions is the correct answer to “What is the purpose of the 'static' keyword in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Structs have all members public by default, while classes have them private by default is the correct answer to “What is the difference between 'struct' and 'class' in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

To enable polymorphism through function overriding is the correct answer to “What is the purpose of the 'virtual' keyword in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Inheritance is the correct answer to “Which concept allows a derived class to inherit properties and behavior from a base class in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

class Derived : public Base {} is the correct answer to “What is the correct syntax for inheriting a class in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

To control the visibility of class members is the correct answer to “What is the purpose of access specifiers in C++ classes”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

To allow a function or class to access private and protected members of another class is the correct answer to “What is the purpose of the 'friend' keyword in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Encapsulation is the correct answer to “What is the concept of data hiding in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

super is the correct answer to “Which keyword is used to access the superclass constructor in a derived class constructor in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

private is the correct answer to “What is the access specifier that restricts access to members of a class to only its friend classes and member functions in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Pointer to the current object instance is the correct answer to “What does the term "this" pointer refer to in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Multiple inheritance is the correct answer to “Which type of inheritance allows a class to inherit properties and behavior from multiple base classes in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

A class is a blueprint for creating objects, whereas an object is an instance of a class is the correct answer to “What is the difference between an object and a class in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Abstraction is the correct answer to “What is the process of hiding the implementation details of a class and showing only the necessary features to the outside world called in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

To achieve runtime polymorphism is the correct answer to “What is the purpose of using virtual functions in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

final is the correct answer to “Which keyword is used to prevent a class from being instantiated in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Arrow operator (->) is the correct answer to “Which operator is used to access members of a class through a pointer in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

Function overloading is the correct answer to “What is the term for the ability of a class to provide different implementations of a function depending on the types of its parameters in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.

public is the correct answer to “Which access specifier allows members of a class to be accessed from anywhere in the program in C++”. This question is standard in competitive examination syllabi for Object Oriented Programming In C Plus Plus.