Question d’entretien chez Google

System performance debugging HTTP Proxy - how does it work strace, truss- System calls and how commands interact with kernel IPC (how threading and process interacts with Kernel in linux) Where does file-names get stored File-name descriptors CPU steal, nice, affinity with examples Real-time performance issue that you solved recently and what tools were used and motivation behind using those Disk i/o and its related tools and issues Good practices for Linux hardening (many questions related to this) Networking and firewalls, Subnetting TTL and how does it affect TCP vs UDP (Why UDP is preferred for video streaming and disadvantage), Why DNS relies on UDP not TCP TTL hop counter load in top with extensive detail and its relation to the CPU core count How does TCP connection establish How does TCP connection finish (browser close) Programming round with Language of choice - Interacting with API, building parser to play on the API output, how you change your code with dynamic requirements Lots of Behavioral questions during the Googlyness round, found it to be hard to be honest. Interviewer was keen on why I made a decision and motivation behind it and if I did a risk assessment before it.