doubts........imp

[siddharth tirodkar]

hi,
this is siddharth and i had a few fundamentals doubts about linux os ..if u
could please resolve them..
  1. In Unix systems the read system call is implemented by the a procedure
in the standard library package (libc) which is also called read. Is is
essential that both of these have the same name?
2.To a programmer, a system call looks like any other call to a library
procedure. Under what circumstances would it be important that a programmer
knows which library procedures result in system calls.
 thanks