* How to make a Python environment for a brand new project
* Source control basics like commits and merging
* Reading documentation or using SO
* Basic command-line debugging or even using print() statements!
I've asked a few times: "How did you get anything done before?". And (S)He responds that they never had to worry about this at Google.
[Edit]: I don't think all or even many Googlers are this way. But that this person made $10k/month for a year and a half gives me pause. I don't thing FAANG's are touchy about firing people. At this rate (S)He likely won't make it through our ninety-day review.