Which among the following is called first, automatically, whenever an object is created?
Constructors are the member functions that are called automatically whenever an object is created. It is a mandatory function to be called for an object to be created as this helps in initializing the object to a legal initial value for the class.
When is the static constructor called?
The static constructor is called before the creation of the first instance of that class. This is done so that even the first instance can use the static value of the static members of the class and manipulate it as required.
Which among the following violates the principle of encapsulation almost always?
Global variables almost always violate the principles of encapsulation. Encapsulation says the data should be accessed only by the required set of elements. But the global variable is accessible everywhere, also it is most prone to changes. It doesn’t hide the internal working of the program.
Why do we use static constructors?
Static constructors help in initializing the static members of the class. This is provided because the static members are not considered to be the property of the object, rather they are considered as the property of the class.
Which keyword is used to refer baseclass constructor to subclass constructor?
base keyword used to refer baseclass constructor to subclass constructor
Why do we use constructor overloading?
The constructors are overloaded to initialize the objects of a class in different ways. This allows us to initialize the object with either default values or used given values. If data members are not initialized then the program may give unexpected results.
Which of the following is the default access specifier of a class member variable?
Default access for the class member variables is Private.
Can a copy constructor be made private?
The copy constructor can be defined as private. If we make it private then the objects of the class can’t be copied. It can be used when a class used dynamic memory allocation.
Which of the following is the correct about static member functions of a class?
The static member is callable on a class even when no instance of the class has been created. The static member is always accessed by the class name, not the instance name.