What happens if a pointer is deleted twice in a program as shown in the following C++ statements?

int *ptr = new int;
delete ptr;
delete ptr;

Which keyword is used to define a class in C++?

A. class

B. struct

C. typedef

D. interface

What is the process of creating an instance of a class called in C++?

A. Encapsulation

B. Polymorphism

C. Inheritance

D. Instantiation

What is inheritance in C++?

A. The process of creating multiple instances of a class

B. The process of hiding the implementation details of a class

C. The process of deriving a new class from an existing class

D. The process of defining functions within a class

What is the access specifier that allows members to be accessed from outside the class in C++?

A. protected

B. public

C. friend

D. None of the above