Question

Two UNIX systems may or may not use the same set of system calls.

(a) True

(b) False

I have been asked this question in exam.

Query is from Introduction to UNIX topic in section The Unix Architecture & General Purpose Utilities of Unix

Answer 1

Correct choice is (b) False

For explanation I would say: All UNIX flavors have one thing in common, they use the same system calls which are described in POSIX specification.