You'll get asked some software questions that the guy talking probably barely understands. For example, I interviewed an Android developer because I'm an iOS developer and I have maybe a week of Android experience. I wouldn't have known the answers myself without reading them. The CEO is totally clueless so if he's interviewing just realize he only sounds like he knows what he's talking about. You'll recognize him as the old, short guy in the room. We'll probably just google software questions on the internet, so know the ones from the top sites that give them out for free. Then you'll get a project that takes about a week to complete.