Booking.com Software Engineer I interview questions

I did only the competence interview, about my past projects and current. They asked me a lot of informations about technologies used and so on. They said me that I couldn't proceed to the technical test because I answered to a question in a contradictory manner. I mean they ask me If I used automatic test environment I said No, specifing that in my last project, my application was under an aoutomatic test but configured by the test team, I received the feed back to fix bug or improve some parameters but I never used directly an automatic test environment. It is no a contraddiction in my opinion.

We have a log file, 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 error .. 001 <timestamp> BEGIN 001 <timestamp> fetched from db 001 <timestamp> some processing .. 002 <timestamp> BEGIN .. 002 <timestamp> fetched from db 001 <timestamp> returned success 003 <timestamp> BEGIN 001 <timestamp> END 003 <timestamp> some work 002 <timestamp> ERROR 003 <timestamp> some other work