Blog contains topmost c interview questions and answers which are frequently asked with some general technical interview questions

1. Launched Website For C Interview Questions To Clear Technical Interviews
A new website for learning C programming has been launched which will guide you to the learn
the basics of C from scratch. The site name is C Interview Questions And Answers which covers
the twisted and basic questions in field of computer science and it also contains maximum
number of possible C interview questions that can be asked in interviews related to stacks,
queue and so on. C coding are used in almost every program or software system. Specific C
programming are essential ingredients of many efficient algorithms, and make possible the
management of huge amounts of data, such as large databases. Some formal design methods
and programming languages emphasize data structures, rather than algorithms, as the key
organizing factor in software design.
All the answers given for the questions given in the site are verified by professors and so my
sincere advice is too read those questions daily and I guarantee that hr of different companies
will mostly concentrate on the questions that are given in that site so this is a easy way to
impress Hr quickly in a easier way without any trouble. Generally interviewer will surely ask
about the project work done in college in each and every interview and you can impress him
only if you know the exact operation of each and every component that you used in your
project and so this site so this site will help you to achieve success in a short way. I am sure that
the above mentioned website will also be useful to your friends. .Mentioned some of the
questions which are present in the above site to know about its quality.If you want to read the
entire questions and answers ,visit http:/www.interview-c-questions.blogspot.com/
Sample Questions from the website:
Question:In printf() Function- What is the difference between "printf(...)" and "sprintf(...)"?
Answer: sprintf(...) writes data to the character array whereas printf(...) writes data to the
standard output device.
Question Compilation How to reduce a final size of executable?
Answer:Size of the final executable can be reduced using dynamic linking for libraries.
Question:How does free( ) know how many bytes to free?
Answer: The malloc( ) / free( ) implementation remembers the size of each block allocated and
returned, so it is not necessary to remind it of the size when freeing.
http://www.interview-c-questions.blogspot.com Page 1

2. Question:What is the use of randomize( ) and srand( ) function?
Answer: While generating random numbers in a program, sometimes we require to control the
series of numbers that random number generator creates. The process of assigning the random
number generators starting number is called seeding the generator. The randomize( ) and
srand( ) functions are used to seed the random number generators. The randomize( ) function
uses PC's clock to produce a random seed, whereas the srand( ) function allows us to specify
the random number generator's starting value.
Question:What's the difference between these two declarations?
struct str1 { ... } ;
typedef struct { ... } str2 ;
Answer : The first form declares a structure tag whereas the second declares a typedef. The
main difference is that the second declaration is of a slightly more abstract type -- its users
don't necessarily know that it is a structure, and the keyword struct is not used when declaring
instances of it.
Question: How do I print the contents of environment variables?
Answer: The following program shows how to achieve this:
main( int argc, char *argv[ ], char *env[ ] )
{
int i = 0 ;
clrscr( ) ;
while ( env[ i ] )
printf ( "n%s", env[ i++ ] ) ;
}
main( ) has the third command line argument env, which is an array of pointers to the strings.
Each pointer points to an environment variable from the list of environment variables.
http://www.interview-c-questions.blogspot.com Page 2

3. Question:Why n++ executes quicker compared to n+1 ?
Answer:The expression n++ needs a single machine instruction such as INR to carry out the
increment operation whereas, n+1 needs more instructions to carry out this operation.
Question:What is the purpose of main( ) function ?
Answer:The function main( ) invokes other functions within it.It is the first function to be called
when the program starts execution.It returns an int value to the environment that called the
program.Recursive call is allowed for main( ) also.It has two arguments 1)argument count and
2) argument vector (represents strings passed).
Question:What is the simplest sorting method to use?
Answer:The answer is the standard library function qsort(). It is already written and already
debugged and also it has been optimized as much as possible (usually).
Void qsort(void *buf, size_t num, size_t size, int (*comp)(const void *ele1, const void *ele2));
For further questions and answers ,visit C Interview Questions With Answers
http://www.interview-c-questions.blogspot.com Page 3