AudioMob QA Engineer interview questions

The Process was fast, but at the end I was not offered, it took 4 rounds. HR Round, Managerial Round, Technical Round(Face2Face), Culture round(with CEO). I was contacted from a recruitment agency. All 4 rounds took place within a span of 15 days, which was quick. But they took alot of time to response back after the last round. To which they rejected my profile saying that they feel other candidates are a better fit. Also there was a assignment given to me before the technical round to prepare a Test Plan.