C Language Interview Question and Answers

6.	What is “this”s pointer?
	The this pointer is a pointer accessible only within the member functions of a class, struct, or union type. It points to the object for which the member function is called. Static member functions do not have a this pointer.

7.	What are the uses of a pointer?
	Pointer is used in the following cases It is used to access array elements. It is used for dynamic memory allocation. It is used in Call by reference. It is used in data structures like trees, graph, linked list etc.

8.	What is the purpose of main() function?
	The function main() invokes other functions within it.It is the first function to be called when the program starts execution. It is the starting function. It returns an int value to the environment that called the program. Recursive call is allowed for main( ) also. It is a user-defined function.

9.	What are the different storage classes in C?
	There are four types of storage classes. Automatic Extern Regiter Static

10.	Define inheritance?
	Inheritance is the process by which objects of one class acquire properties of objects of another class.