[Terry_Roll]

> So, how can one effectively fill gaps in their CS knowledge?

Its a vast subject, you will have a lifetime of learning on the job, so having a good memory will help because some knowledge you acquired years ago, think of it like a jigsaw piece, will sit in isolation tucked away in your mind until another piece of the jigsaw presents itself and then you can join those two pieces of knowledge together, and eventually you will have built a reasonable idea (think picture for the jigsaw analogy here), of how a computer works, how the OS works, software running on one or more OS'es works, and how it connects to other devices using the internet and other forms of communication like wifi, bluetooth, Infrared, etc etc.