OK, I'm really ashamed to plug one of my own sessions, but I do highly recommend this session (or type of session - Peter Ward is doing something similar, as are a number of others).
If you're fuzzy on any of these questions, you may find this of interest:
What's the difference between RAID 10 and RAID 0+1?
Which is worse, bandwidth or latency issues?
What do Agile, SCRUM, Xtreme, pair-programming and a lonely DBA have in common?
What's a Context Switch?
Does a bottleneck with memory mean that you need more memory?
How do you cost justify purchasing a database utility (any kind)?
What's the difference between a forest and a domain?
XQuery? XSD? Well-formed? WSDL?
These are a brief sample of the range of subjects I'm going to cover. If you haven't seen me speak before, when I'm passionate about something, I'm pretty animated (maybe in the literal 'daffy duck' way rather than just being active). I'm passionate about this subject. I truly believe every DBA has a responsibility to at least be conversant in an wide range of subjects. I'll try to back that by demonstrating the usefulness of this knowledge in the session.