If you have Python on your CV, and I ask you how the garbage collector works, I don't want you to read some stack overflow summary to me. I want to hear your own description, so I can make a judgement how deep your knowledge of Python internals goes.

Anybody can type specific questions into Google. But if it comes to producing performant code, you need to have that knowledge in the back of your mind, because nobody is going to tell you to google that.