1. A new version of the operating system is being planned for installation into your departments production environment. What sort of testing would you recommend is done before your department goes live with the new version? Identify each level or type of testing and describe what is tested. Explain the rationale for selecting and performing each level (type) of testing. Do not confuse testing methodology with testing levels or type. You may mention testing methods as part of your answer if you feel this is important, however the focus of the question is on testing levels.

Each testing type you list should include a description of why this is important when installing a new operating system.