C Interview Questions

[Kalyan]

C Interview Questions

   1. How do you decide which integer type to use?

   2. What should the 64-bit integer type on new, 64-bit machines be?

   3. What's the best way to declare and define global variables?

   4. What does extern mean in a function declaration?

   5. What's the auto keyword good for?

   6. I can't seem to define a linked list node which contains a pointer to itself.

   7. How do I declare an array of N pointers to functions returning pointers to functions returning pointers to characters?

   8. How can I declare a function that returns a pointer to a function of its own type?

   9. My compiler is complaining about an invalid redeclaration of a function, but I only define it once and call it once. What's happening?

  10. What can I safely assume about the initial values of variables which are not explicitly initialized?

  11. Why can't I initialize a local array with a string?

  12. What is the difference between char a[] = "string"; and char *p = "string"; ?

  13. How do I initialize a pointer to a function?