The primary function of Unix is the same as it would be for an Operating System - to manage resources and provide security.
Ubuntu is a free, supported debian/linux implementation of Unix. As such, you can do nearly anything that you can do in Unix in Ubuntu.
The reason for the exec functions being same/similar is because the Mac OS has its roots in variants of the Unix kernel.
With OS-dependent library functions. In unix it can be 'fork', in Windows, 'CreateProcess'.
Actually, just about anything you want to do. Depends on the job function requirements.
UUCP is the abbriviation of Unix to Unix copy. It is worldwide email system called UUCP or Unix to Unix copy.This email system was developed for the operating system called Unix.
No, but Linux is based on Unix since Linux is a Unix clone.
Unix work is performed by users of the unix system, for application and system programs, or anything that requires a Unix system.
A computer that runs Unix.
Unix commands
A Unix console is a CLI interface through which to control or monitor a Unix computer.
Unix configuration is the process of tailoring a freshly installed version of Unix to your particular environment. Each Unix system may do that differently.
Solaris is a specific version of Unix; the term 'Unix' refers to a classification, and several vendors provide a Unix-like environment. So, in a sense, Unix and Solaris are the same thing.