Firstly, how much do you code when you are doing your undergraduate? No offense, but 2-5 hours seems too long. If so, you should first brush up your basics, and

Firstly, how much do you code when you are doing your undergraduate? No offense, but 2-5 hours seems too long. If so, you should first brush up your basics, and let go of the thought 'I am from a CS major'. Programming is almost always self-taught, or can't really be learnt effectively through classes, only through, you know practices. Assuming your college did an OK job, you should pick up and relearn everything relatively fast, in 2-3 months or so. Algorithmic questions can be pretty intimidating for sure, so again, practice a lot, ask your friends to do mock interviews, and go interview around with less famous companies on the market, to understand the process will also help. Anyway, self-taught is the only way here. I have an imposer syndrome when I graduated. It does make feel better knowing that one of the best guys in our class, who we assume is already a CS guru at the very beginning, actually knows nothing about programming at that beginning. He was faking it to project confidence to us, but after getting positive feedback from the environment, he actually gained the momentum to learn and understand CS as the guru we thought he was. So it is not too late to do it all over again. Hope this helps. :)