This may not be related to the exam, but I thought would be of interest to an architect.
How do you estimate server resources needed for running a J2EE application? Say you are starting to build a J2EE application and the management wants to know what servers(number of machine/processors, memory, etc) you need when you go live so that they can procure them in advance. How would you estimate this? What are the factors you would look at to come with this estimate.