It was a 3 Round of Interview followed by Managerial discussion (mostly about joining and salary) . Round 1: An assessment to build Soduku solver along with well structured unit tests. Round 2: Follow up technical interview ,He/She might ask you about how did you built the soduku solver? Design Pattern, explanation about architecture, Unit testing. They can ask you to run your app and they will provide input to test. Round 3: Another round with Sr. Developer to check you further ability, understanding of programing concepts, experience, scenario etc. He/ She can ask some questions from your assignment as well.