I did 2 rounds of interview 1) round 30 mins with project manger, some general questions about me and what types of testing i performed, why you want to join trivago, do you know working model of trivago, and some intro about company was given 2) second round same project manger and a test lead, one sql problem to solve in 10mins, i felt it was not very easy to solve but managed to partially solve, next set of questions had a diagram for which they gave a very complex explanation and asked testing strategies for which i was able to answer, overall interview went well but later they said i was not through to next round