oh god i felt this one. Devs too busy, incompetent or just plain lazy to figure out why their code is so slow, so just have ops throw more CPU and memory at it to brute force performance. Then ops gets to try to explain to management why we are spending $500k per month to AWS to support 50 concurrent users.
These textbooks are trash and written by morons. When I was in college one of the required books said very clearly that sleep and hibernate are exactly the same thing. It said that both suspended to RAM and hibernate was just some lower power version of sleep. It was even a question on an exam that I got wrong for some reason. I argued with the professor about it and proved to him thats not the case by taking one of the lab computers, hibernating it, physically taking the ram out and swapping it with another computer and resuming into the same state on power on. He said “Well thats what it says in the textbook so I have to mark it wrong”
It really highlights that there are probably a lot of other inaccuracies that I didn’t notice. This is the standard of education nowadays.