C Interview Questions - 6

• How can called function determine number of arguments that have been passed to it?
• How can we check whether contents of two structure variables are same or not?
• How can we read/write Structures from/to data files?
• How much maximum can you allocate in single call to malloc()?
• How will you declare array of three function pointers where each function receives two ints and returns float?
• If we want that any wildcard characters in command line arguments should be appropriately expanded, are we required to make any special provision? If yes, that?
• In header file whether functions are declared or defined?
• In header files whether functions are declared or defined?
• Increase size of dynamically allocated array?
• Increase size of statically allocated array?
• Out of fgets() and gets() that function is safe to use and why?
• Program : compare two strings without using strcmp() function.
• Program : concatenate two strings.
• Program : find Factorial of number.
• Program : generate Fibonacci Series?
• Program : interchange variables without using third one.
• Program : s for String Reversal. same for Palindrome check.
• Program : that employs Recursion?
• Program : that uses command line arguments.
• Program : that uses functions like strcmp(), strcpy(), etc.
• To that numbering system can binary number be easily converted to?
• Use bsearch() function to search name stored in array of pointers to string?
• Use functions fseek(), freed(), fwrite() and ftell()?
• Use functions memcpy(), memset(), memmove()?
• Use functions randomize() and random()?
• Use functions sin(), pow(), sqrt()?
• Use qsort() function to sort array of structures?
• Use qsort() function to sort name stored in array of pointers to string?
• What advantages of using Unions?
• What do functions atoi(), itoa() and gcvt() do?
• What do ‘c’ and ‘v’ in argc and argv stand for?
• What does error ‘Null Pointer Assignment’ mean and what causes this error?
• What does static variable mean?
• What is NULL Macro? Difference : NULL Pointer and NULL Macro?
• What is NULL Pointer? Whether it is same as uninitialized pointer?
• What is far pointer? where we use it?