the mainframe application has these test area A, test area B, test area C and test area D what are these? can anyone please explain in detail what they are and how they work?
What are test areas inside a mainframe computer?
A test area of enterprise computing, not just mainframes, is an area where new or update applications can be run without impacting "live" data. There are usually 3 primary areas - DEV, TEST, and PRODUCTION.
DEV is where the programmers play. They write code and test it against the existing system and makes changes to that code without impacting other users. Once the code is stable, they'll migrate it to a TEST environment.
The TEST environment will try to mimic the PRODUCTION environment as closely as possible. Testers will then use the update applications and try to break them without impacting PRODUCTION users.
If there are problems in TEST, the code is modified in DEV then moved to TEST again - rinse, lather, repeat.
Code is only moved to PRODUCTION when its deemed stable enough by the testers to be run by the general population on "live" data.
Multiple test areas are probably just iterations of this or various production environment mirrors.
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