SOLUTION OF THE 2019-2020 PAPER

                                                                SECTION-A

A).Name different storage class with one example each.

Ans: Register Storage classes  

        Static Storage classes 

        External Storage classes

B).Describe the functionalities of Operating System.

Ans: The functionality of operating system are as follows:

        1.security                                                    4.coordination b/w software and users.

        2.control over system performance            5.processor management 

        3.memory management                              6. file management

        

C). Diffrentiate between Implicit and Explicit Type Conversion.

Ans: IMPLICIT TYPE CONVERSION: This is the method in which the compiler converts one data type to another data type by itself.

EXPLICIT TYPE CONVERSION. This is the method of converting one data type to another data type by forcing or commanding the compiler.

D).What do you understand by mixed operands?

Ans: In an expression, when operands of diffrent data types are used, they are called "mixed operands ".

example: int a +float b 

E).What do you mean by the prototype of the function?

Ans:A function prototype or function interface is a declaration of the function that specifies the function name and type signature but omits the function body.

F). Differentiate between while and do-while loop.

Ans: while loop : In this loop first the condition is checked and then the execution the program starts.

        Do-while loop: In this loop first the programs runs and then the condition is checked. 

H).Differentiate Structure and union.

Ans:

I).Explain the role of C preprocessor.

Ans. The preprocessor provides the ability of include the header files , macro expansion and line control.

J). What do you mean by pointer arithmetic?

Ans: A pointer in c is an address which is a numeric value. Therefore we can perform arithmetic operation on a pointer.