Wednesday, 23 September 2015

100 Top C Programming Interview Questions and Answers

1) Who invented C Language?
Dennis Ritchie in 1972 developed a new language by inheriting the features of both BCPL and B and adding additional features. He named the language as just C.

2) Who invented B Language?
Ken Thomson at AT&T Bell Labs developed a language and named it B. Even the B language was found to have some short comings to support development of both business
applications and system software.

3) Who invented BCPL Language?
Basic Combined Programming Language(BCPL) was developed by Martin Richards, Cambridge university.

4) Why C Language?
C is one of the high level languages. It is a general purpose language, which means it can be used to write programs of any sort.

5) What are the features of C Langauges?
=> In C one can write programs like that of high level languages as in COBOL, BASIC, FORTRAN etc. as well as it permits very close interaction with the inner workings of the computer.
=> It is a general purpose programming language. It is usually called system programming language but equally suited to writing a variety of applications.
=> It supports various data types
=> It follows the programming style based on fundamental control flow constructions for structured programming
=> Functions may be predefined or user defined and they may return values of basic types, structures, unions or pointers.

6)What are the advantages of c language?
=> Easy to write
=> Rich set of operators and functions that are built–in
=> Support for bit–wise operation
=> Flexible use of pointers
=> Direct control over the hardware
=> Ability to access BIOS/DOS routines
=> Interacting using Interrupts
=> Ability to write TSR programs
=> Ability to create .COM files
=> Ability to create library files (.LIB)
=> Ability to write interface programs
=> Incorporating assembly language in C program

7) What are the disadvantages of c language?
=> C is considered difficult to learn
=> Because of its conciseness, the code can be difficult to follow
=> It is not suited to applications that require a lot of report formatting and data file manipulation

8) What are the salient features of c languages?
=> The following are the salient features of C language are :
=> C is called a middle level language
=> C supports structured design approach
=> C is extensible
=> C is rich in data types and operators
=> C is portable

9) What is a header file?
Header files provide the definitions and declarations for the library functions. Thus, each header file contains the library functions along with the necessary definitions and declarations. For example, stdio.h, math.h, stdlib.h, string.h etc.

10) What is character set?
Character set is the set of characters allowed and supported in the programming language.
Generally a program is a collection of instructions, which contain groups of characters. Only a limited set of characters is allowed to write instructions in the program.

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