Technical Interview Questions

BASICS

What does static variable mean?

Is the allocated space within a function automatically deallocated when the function returns?

variables argc and argv are always local to main ?

Can main () be called recursively?

difference between the functions memmove() and memcpy()?

What are the types of file?

What is a stream ?

What is meant by file opening ?

Example to illustrate fopen() ?

What is a random access file ?

What is the purpose of rewind() ?

what is the difference between a array name and a pointer variable ?

How would you use the functions fseek(), freed(), fwrite() and ftell()?

How would you use the functions fseek(), freed(), fwrite() and ftell()?

Explain C identifiers?

Write a program to interchange 2 variables without using the third one.

How would you use the functions randomize() and random()?

list out the advantages of preprocessor ?

What is the difference between syntax vs logical error?

What do the functions atoi(), itoa() and gcvt() do?

what are the main objective of preprocessor ?

What is preincrement and post increment ? use example to illustrate it.

Explain the two forms of #include directive ?

What are C tokens ?

What is the maximum combined length of command line arguments including the space between adjacent arguments?

Explain the two forms of #include directive ?

What are bit fields?

What is a preprocessor?

What is modular programming ?

Write a program which uses Command Line Arguments?

What is the major difference between formal argument and actual argument ?

What is a function ?

What is an argument ?

What are built in functions ?

Is it possible to have more than one main() function in a C program ?

Write a program which employs Recursion ?

What is the difference between an enumeration and a set of pre-processor?

Why is it necessary to give the size of an array in an array declaration ?

Differentiate between a for loop and a while loop? What are it uses?

What are register variables? What are the advantages?

What is recursion?

Can we specify variable field width in a scanf()

What is the use of typedef?

What is storage class.What are the different storage classes in C?

Out of fgets() and gets() which function is safe to use and why?

Difference between strdup and strcpy?

Is it possible to have negative index in an array?

Difference between linker and linkage ?

What is static memory allocation ?

Are the expressions arr and &arr same for an array of integers?

What is the difference between Strings and Arrays?

What is dynamic memory allocation?

What is the purpose of realloc ?

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