Cognizant MEan Stack Developer interview questions

It took along two hours to get the first round, and here for mean stack developer, they focus on Angular mostly, nothing else. For experienced mean stack developer, they were testing Angular and UI skills at first, which i didn't expect, because i have attended around 15 interviews in MNC and mid-level, and was expecting atleast they will ask complete technology, because i am Mean Stack developer. But anyways its this Big's have their way of hiring. so my advice for anyone is For mean stack, you should be good enough at UI and Angular first, then only focus goes to Node.js, MongoDB....