Which C++ data type can hold only the values true and false?
Correct answer D. bool
Topic / 30 questions
C++ MCQs
C++ MCQs test your understanding of the C++ language, including classes, constructors, pointers, inheritance and exception handling. They help computer science students and software job applicants check their basics, and every question shows its correct answer immediately so you can fix gaps before an exam or interview.
Which C++ feature lets you write one function or class that works with many data types?
Correct answer D. Templates
Which C++ Standard Library container works as a dynamic array that can grow in size?
Correct answer B. vector
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Which C++ keyword is a pointer to the object for which a member function is called?
Correct answer C. this
What is the default access level of members of a struct in C++?
Correct answer D. public
Which C++ keyword gives a non-member function access to the private members of a class?
Correct answer B. friend
In C++, what is it called when several functions share the same name but have different parameter lists?
Correct answer C. Function overloading
Which access specifier allows class members to be accessed by derived classes but not by outside code?
Correct answer B. protected
How is a pure virtual function declared in C++?
Correct answer B. By writing = 0 at the end of its declaration
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Which C++ keyword allows a base class function to be overridden and resolved at run time?
Correct answer A. virtual
In C++, what is a member function with the same name as its class, preceded by a tilde (~), called?
Correct answer B. Destructor
Which symbol is the scope resolution operator in C++?
Correct answer A. ::
Which operator is used with cout to send output to the screen in C++?
Correct answer C. <<
Which C++ operator releases memory that was allocated with new?
Correct answer C. delete
Which header file must be included to use cin and cout in C++?
Correct answer B. iostream
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An exceptio in C++ can be generated using which keywords
Correct answer C. throw
To perfor file input / output operation in C++, we must include which header file
Correct answer D. <fstream>
In C++ Program, inline fuctions are expanded during
Correct answer A. Run Time
In CPP, members of a class are ____ by default
Correct answer B. Private
Reusability of code in C++ is achieved through
Correct answer B. Inheritance
About C++ MCQs
This topic covers object-oriented C++ concepts that written tests often check. Questions ask which keywords generate and handle exceptions, namely try, throw and catch, and how code reusability is achieved through inheritance. You will see that a default constructor takes no arguments, that class members are private by default unlike struct members, and that an uninitialised pointer is called a wild pointer. Other items deal with declaring a pointer more than once and basic syntax rules. These points come up in computer science lecturer tests, software house screening tests and placement rounds.
Exams that include C++ MCQs
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Frequently asked questions
What is the default access specifier for class members in C++?
Members of a class in C++ are private by default, so they cannot be accessed from outside the class unless declared public or protected. In a struct, members are public by default. This difference is one of the most common C++ MCQ topics.
What is a wild pointer in C++?
A wild pointer is a pointer that has been declared but not initialised, so it holds an unpredictable address. Using it can crash a program or corrupt memory. Good practice is to initialise pointers to nullptr or to a valid address when they are declared.
Last reviewed October 2026