A recruiter contacted me from LinkedIn. After that, there was an HR phone call. Then, I was given a technical assessment on HackerRank. It contained four questions and lasted 75 minutes. The questions were easy but required time. I couldn't solve all of them. After that, a technical interview was arranged via HackerRank's Pair Code platform.

We have a log file that can grow pretty big.

Each line is a trace-log, and the first field is the RequestID.

We need to scan the file and print all the logs for requests which resulted in an error.

Example log entries: 001 BEGIN 001 fetched from db 001 some processing .. 002 BEGIN .. 002 fetched from db 001 returned success 003 BEGIN 001 END 003 some work 002 ERROR 003 some other work