Top 500+  C Language Interview Questions and Answers Pdf - 2

Question: 6

What are header files?

Header files are file with extension h.

These files contain declarations of library functions and predefined constants and macros.

Question: 7

What are Keywords?

Keywords are certain reserved words that have standard and pre-defined meaning in C.

These keywords can be used only for their intended purpose.

Question: 8

What are the different data types available in C?

There are four basic data types available in C,

int,

float,

char and

double

Question: 9

What is the difference between C and Java?

C is structure/procedure oriented programming language whereas Java is object oriented programming language.

C language program design is top down approach whereas Java is using bottom up approach.

C language is middle level language whereas Java is high level language.

Exception handling is not present in C programming language. Whereas exception handling is present in Java.

Polymorphisms, virtual function inheritance, operator overloading, namespace concepts are not available in C programming language. Whereas Java supports all these concepts and features.

Question: 10

Basically, what does the header files contain?

The header file contains declarations of library functions (prototypes of library functions) and useful enumerations and macros for the convenience of the programmers.