i was in a FAANG interview where i was asked such a question that was internal and straightforward. the person assumed that the way they were doing this, was common industry practice. however, i have been in that particular specialization they were interviewing me for for a good 20 years and never heard of a company doing it that way. i am quite sure that the person mistakely assumed that because his FAANG did it that way, it must be industry practice.