Interview Questions

C Interview Questions with Asnwers posted on July 20th, 2008 at 8:47 am by Siri Question - Define recursion in C Answer A programming technique in which a function may call itself. Recursive programming is especially well-suited to parsing nested markup structures Question - What does static variable mean in C? Answer static is an access qualifier that limits the scope but causes the variable to exist for the lifetime of the program. This means a static variable is one that is not seen outside the function in which it is declared but which remains until the program terminates. It also means that the value of the variable persists between successive calls to a function. The value of such a variable will remain and may be seen even after calls to a function. One more thing is that a declaration statement of such a variable inside a function will be executed only once.

Click here to share knowledge by answering these questions What does static variable mean in C?  Define pointer in C. Explain structure. List out differences between structures and arrays. Define macros. What are the advantages and disadvantages of Macros? List out differences between pass by reference and pass by value. Define static identifier in C? What are the auto variables? Where are they stored? List out differences between arrays and linked list? Explain the term enumerations in C. Describe about storage allocation and scope of global, extern, static, local and register variables? Define register variables? What are the advantage of using register variables? What is the use of typedef? Can we specify variable field width in a scanf() format string? If possible how? Out of fgets() and gets() which function is safe to use and why? List out differences between strdup and strcpy. Define recursion in C.  Explain the term macros in C. What is the difference between char *a and char a[]? What is a NULL pointer? How is a NULL pointer defined? Define void pointer. What is a const pointer? Explain memory leak. What is the difference between malloc() and calloc()? What is static memory allocation and dynamic memory allocation? What is a const pointer? What is the purpose of main( ) function? What is the differece between #define and constant in C? What are storage class in c? Difference between Funtion to pointer and pointer to function What is the difference between a string and an array? Click here to share knowledge by answering these questions