LANGUAGES | C | C LANGUAGE INTERVIEW QUESTION AND ANSWERS | 02

What are the uses of a pointer - What is the purpose of main() function

C Language Interview Question and Answers:

1. 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.

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

3. 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.

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

5. 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.