Tessella Graduate Data Scientist/Software Developer interview questions

The 1st interviews was okay, talked about my experience and why I was interested in the role. The 2nd interview though as a full day affair, starting at 9am going all the way till around 3 pm. The first part included a coding exercise to see your coding ability, this involved a sheet with a few questions about making a password generator. Quite engaging and I believe a good test of ability. Then talks with different members of staff, some just a small talk others for getting to go through your projects. Then after lunch a review on your coding. After this it was a presentation with a senior member of staff on a subject you had prepared and later end talks. Over this was a good experience though if a but longer then needed. After that I waited to hear my feed back, unfortunately that never came and I was just informed I was unsuccessful. How disrespectful. After hours and days of preparing they didn't give feed back. This may be a good company but there interview process need to be re thought and they need to learn to respect people who put so many hours into the interview process.