Depends on the FAANG, Google famously throws devs at ops problems. Ironically they realised this wasn't a good idea in exclusivity, so now they hire two discip

Depends on the FAANG, Google famously throws devs at ops problems. Ironically they realised this wasn't a good idea in exclusivity, so now they hire two disciplines: SRE-SWE and SRE-SYS. SRE-SYS is as you would expect, pretty standard sysadmin knowledge from 2005 (IE; not helpdesk sysadmin, some scripting knowledge, heavy OS knowledge, heavy debugging knowledge). SRE-SWE is much more programmer heavy with a light touch on OS fundamentals (based on what I consider important for OS knowledge FWIW).