To walk away with a deeper understanding than just honed copy and paste skills when using the Cookbook, you need some knowledge about the underlying technologies. These self tests will access your ability to use the &PRODUCT; tooling.

How can you find out how many free extents are in your available volume groups? What command will tell you how much free space is left on your logical volume snapshot? What happens if your snapshot becomes full? How can you determine the origin logical volume of a snapshot? If your root paritition is a single volume group that occupies all extents on your only volume group. How can you free up space for creating other logical volumes / volume groups? If you are using LVM to back a Xen guest why does simply growing the logical volume not give your guest more disk space? If your volume groups or logical volumes are not showing up at their appropriate device mount points under /dev, what command(s) can you run to create the necessary device nodes? (Useful for working with LVM in rescue mode)

How can you make your Xen guests start at boot time? Explain the relationship between the Dom0 (or Domain-0) and the DomU. From a user's point of view, what are the main differences between using para-virtualization and hardware assisted virtualization? What is the name of the library that both xm and virsh use? What service must be running for this library to make hypercalls? (When you figure it out, temporarily shut it off and try running +virt-install+) Where does virt-install create its guest configuration files? How can you completely delete a guest from the command line? (Say, if you created it originally with virt-manager). When you are running Xen's default bridged network what is the default name for your real ethernet device? What will the affect be on your guests when running a Xen host without network connectivity? Why? Give a highlevel explaination of the difference between a bridged and a routed network. If you wanted to use NAT instead of the default bridged network setup what config file would you edit?

Name a command that is not safe to run while other people are using your repo. Say you just made a bad commit on your private branch, how can you fix it? What does git pull do under the covers? How is that different than +git fetch+? What is a bare repo? How can you convert a working repo into a bare one? How many bytes does it take to create a new branch? What do the commit SHA1 sums represent? What is unique about cloning a repo to a location on the same filesystem? What is the danger in using git rebase on a public branch? How can you erase all traces of a bad commit on your private branch? How can you checkout the state of your current branch 6 commits ago?