Constructor is executed when _____.a.a class is declaredb.an object goes out of scope.c.an object is createdd.an object is used

Answer to the Question

The correct answer is c. an object is created.

Explanation

A constructor is a special method in a class that is automatically called when an instance (object) of the class is created. Its primary role is to initialize the newly created object, ensuring it has valid initial values for its properties or attributes. When you create an object using the new keyword in languages like Java or C++, the constructor for that class is invoked, facilitating setup procedures such as allocating resources or setting default values.

In contrast, the other options do not appropriately fit the function of a constructor:

1. a. a class is declared - This simply refers to the definition of the class itself, not its instantiation.
2. b. an object goes out of scope - This typically triggers a destructor (if one exists) rather than a constructor.
3. d. an object is used - This implies that the object is already created and being manipulated, which does not involve the constructor.

Thus, the constructor's execution is precisely tied to the creation of the object.