This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Query optimization is a skill that is very important. However, I do not see the relation of this certificate with an architecture role.
Is there a reason why you think this particular exam fits into architecture?