As per the expansion and development in the country IOT , CLOUD COMPUTING , DATA ANALYTICS , AI and CYBER SECURITY all are very good and diversed fields to learn.It totally depends on you in which specialization you are wiling to learn and excel. Talking about placements every field has numerous opportunities and their demand is also progressing day by day. As per BTECH in CSE it would be great to have AI, DATA ANALYTICS or CYBER.