I'm in btech 2nd year which competitive exam is better to start preparation cat or SSC CGL or RRB ??

Hello,

First of all you should pursue CAT only if you're interested in management studies and want to have a career in this field, the scope of opportunities in case of MBA is more with corporate sector or private sector to be more specific, though there are also opportunities in banking sectors pertaining to various posts, but other than this in general you only need graduation in any discipline from a recognized university if you want to appear for any government exams, of course there are also domain specific jobs, as you come from engineering background, you can appear for your domain in exams conducted by UPSC IES, SSC JE, RRB JE etc, the choice between banking or ssc cgl is more dependent on you, the level of banking exam is comparatively higher than ssc cgl, both the exams are equally popular, and in the recent times many engineering graduates too are appearing for the same and qualifying as well, you can appear for both, and banking exams will also be not tough for you, as you're an engineering student, evidently your quant and reasoning will be strong which is strong factor in qualifying exams, for ssc cgl also other than these subjects you're required to know about english, general awareness, and there are also skill tests conducted unlike in case of banking jobs, ssc cgl is conducted in four phases while banking exams are conducted in three phases only, hence you should choose as per  your  interest for specific job profile.