Sollicitatievraag bij Rippling

Design a Key Value Store string get(string key); void set(string key, string value); void deleteKey(string key); Follow up 1 Support transactions - begin, commit and rollback. I immediately asked the interviewer if we needed to support nested transactions. He said yes but for the next followup. He still asked me to first code it for 1 level of transaction for which I took a lot of time. Follow up 2 Support nested transactions. No time was left.