Be warned - the exam questions are clearly not written by a native English speaker. Example: "[Some Company] is not interested any more to add any infrastructure software apart from web server and database". Or another: "deployment time needs to be improved whenever there occurs changes in the tables". Or another: "During production deployment you noticed that your web server residing at DMZ, serves only static contents and other components are running in the application server". Say, what? Given that absolute clarity in an exam is essential, this is frustrating.