Thanks for the comment !
Yes it could be a overkill to get this level of understanding on redis .
But the intention is deep dive into a topic and understand the potential .it may not be low lever .the only thing I trying to highlight is go deeper .ANYTHING.
The reason to share this is also to help whoever preparing an interview right now ,they can have a deeper and better discussion with the interviewer .
Yes agree Abstraction is another topic .I do see some candidate has great understanding on that .but to deep dive could need another post .(much longer than this comment ;) )