Keeping in line with the NDA......
1 . Either if both are still covered in the objectives. I say set up both in turn.
2. Either here too. You are asked to set up a mail server that does certain things. You can choose - up to you, but i say be familiar with BOTH. It is normally a pretty simple set up, nothing too complex...just get the server up and running, do not allow open relay and only allow xxxx hosts to be able to relay....
3. This kernel is fine...doesnt matter too much.
4. Be familiar with kickstart if it is still covered in the objectives. Just make sure you can build a new host with kickstart. Not particularly hard seeing that any build creates a anaconda-ks.cfg which all you need to do is edit a few places and then ask a new install to reference this file for a fully automated install. Mainly be familiar with how to call a kickstart config file from a linux boot install prompt.
5. Boot cd / rescue mode
6. I dont recall the soundcard and mouse bit, but every exam is different. Refer to the objectives.