As stated by many others before this post, the HR at Tredence is the most unprofessional one will ever come across. I have had HR call me without prior intimation at 5:45 AM my time. Not once but thrice and even demanded i take the final round within one hour. Anyway, Round 1 was a puzzle round. All puzzles were easily available online and anyone can crack these. 2nd round was with an SBA who knew little about statistics. Questions asked were extremely silly and exactly what you would expect from someone who googles all his stats. Third round was a "manager" round which was the most ridiculous case study ever. Now comes the best part. Tredence then has a fourth round which is co-founder round. Bear in mind it is the same co-founder for everyone who also doubles up as analytics head. I found him to be rude and judgemental from the word 'Go'. Interrogation much?? The worst part is I havent heard back from this company after my final round. Even if it is a decline one should be courteous enough to reply. Also before you accept an offer make sure you have their H1B plans in writing. I know of a friend who works at Tredence and this org did not file his H1B in the first year, simply exploiting his OPT stem extension. Absolutely unprofessional conduct. They also expect you to be a slave for offshore, be available on call at odd US hours and on vacation as well.