Section 4 : Constructors and Destructors, Dynamic memory management

Question 1

What is a constructor in C++?

Answer 1

A special function with the same name as the class, called automatically when an object is created. It has no return type.

Question 2

What is a default constructor?

Answer 2

A constructor with no parameters. Automatically created by C++ if no constructor is defined.

Question 3

What is constructor overloading?

Answer 3

Having multiple constructors in the same class, each with different parameter lists.

Question 4

What is a copy constructor?

Answer 4

A constructor that creates a new object as a copy of an existing object. It takes a reference to another object of the same class.

Question 5

What is a destructor?

Answer 5

A special function that is automatically called when an object is destroyed. It starts with ~ and has no parameters or return type.

Question 6

What is the purpose of the :: scope resolution operator in C++?

Answer 6

The :: operator is used to access a variable or function from a specific scope, such as a class, namespace, or the global scope.

class MyClass {
public:
void show();
};

void MyClass::show() {
// Defined outside the class
}