Interview Questions and Answers

5. How can I pad a string to a known length? Padding strings to a fixed length can be handy when you are printing fixed-length data such as tables or …

3. How can I remove the leading spaces from a string? The C language does not provide a standard function that removes leading spaces from a string. It is easy, …

1. What is the difference between a string copy (strcpy) and a memory copy (memcpy)? When should each be used? The strcpy() function is designed to work exclusively with strings. …

9. How do you list a file’s date and time? A file’s date and time are stored in the find_t structure returned from the _dos_findfirst() and_dos_findnext() functions. The date and …

5. Can stdout be forced to print somewhere other than the screen? Although the stdout standard stream defaults to the screen, you can force it to print to another device …

1. If errno contains a nonzero number, is there an error? The global variable errno is used by many standard C library functions to pass back to your program an …

7. Why can’t constant values be used to define an array’s initial size? There are times when constant values can be used and there are times when they can’t. A …

5. Can you assign a different address to an array tag? No, although in one common special case, it looks as if you can. An array tag is not something …

3. Can the sizeof operator be used to tell the size of an array passed to a function? No. There’s no way to tell, at runtime, how many elements are …

1. Do array subscripts always start with zero? Yes. If you have an array a[MAX] (in which MAX is some value known at compile time), the first element is a[0], …