IOE is 25 hours minimum. Fun time. Enjoy it.

There is no "oral" on systems. It's called a systems validation test. A multiple choice computer exam. Pay attention to the CBT (computer based training- there is little classroom on systems), take few notes, read a little, and get the test gouge. It's easy. I've taken three of them and the most I've missed is 4. There is normally 150 questions and you need a 80% to pass.

Relax, it's easy. Have fun with it.