One major tip especially important for IT jobs. If they ask you a question on how to do something, think about for a few seconds before you answer, and if you just flat out dont know, DO NOT try to bullshit your way through it with some bs answer. They will probably be able to catch it and it will just make you look the fool to them. Just honestly say you have no experince with that. But let them know that you do have the ability to learn it. Remember that the computer industry is always changing and its look better if they think you can learn new stuff to keep up rather than having a bunch of old outdated knowledge.

And if you dont get it, just keep learning new stuff and looking else where.