It was a long process which took my entire day & there were total 4 rounds
1st Round consisted of 2 coding problems on hackerrank.com which you can take from any location.
2nd Round again consisted of 2 coding problems (level higher) on hackerrank which you have to take at their premises.
3rd Round was Technical in which they again gives you multiple coding problems and you have to solve & run those problems on Online Compiler in any language.
4th Round was HR round in which they just ask you about your goals , family ,about MountBlue.
After clearing all 4 rounds I got an offer letter within 2 days from MountBlue Technologies.
P.S- They also provide food at their premises :-)