Interview/Viva Question of C language - Part I

1. What is the C language?

-> C is a high-level structure oriented programming language. It's used to performing programs

2. Which are the different storage classes specifier in C language?

-> Static, Auto, Register,extern

3. What is difference between i++ and ++i ?

-> The expression i++ return old value and then increment the value of i. and in expression ++i first value is incremented and its return the new value.

4. What is a pointer on the pointer?

-> It is a pointer variable which can hold the address of another pointer variable.

5. What is #include?

-> It is a preprocessing directive. Which is used to add or include the header file like stdio.h or conio.h.

6. What is stdio.h?

-> stdio.h is standard input-output header file, In this header file having some standard input-output functions such as printf() and scanf().

7. What is conio.h?

-> conio.h is the standard header file. Its declare library functions for performing console input and output.

8. What is the prototype function?

-> prototype function provide some information to the compiler like

a) Name of function 2) Parameter of function 3) return type of function.

9. How many types of the loop in C language?

-> There are 3 types of loop in C

a) While Loop

b) For Loop

c) Do while Loop

10. What is the use of the main() function?

-> Main function same as every function, it has the return type. The main function is called by the operating system when the user runs the program.

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