c fundamental interview questions

In this articles we would discuss common problem but intresting interview questions in C Programming Language
1) What is gets() function?how to use it?hidden issues with this function?
2) Do you know Strcpy()function?How to use it?
3) What is the  Return type of main()?
4) Memory Leak?Explain?
5) The free() function?Explain?
6) atexit with _exit ?Explain?
7) void* and C structures?Explain
8)  * and ++ operators?Explain?
9)  Making changes in Code(or read-only) segment?
10) Process that changes its own name?Write program?
11) Returning address of local variable?Write program?
12) Processing printf() arguments ?Explain?
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