In case, you want to make a career in the computer - field, you need to concentrate a better preparation in the competitive examination. Though there are possibilities of lateral - entry in the second year after doing your diploma in the computer - stream, but such an achievement may become a distant - dream in the wake of limited seats for the diploma holders.
In order that you grab a seat in a reputed Enginnering college like REC or a seat in IIT, you will have to gear up with the fundamental clarity of Physics, Chemistry and Mathematics so that you can qualify in the tests organised by them.
After 10+2, you will get plenty of oppurtunities of securing a seat in Engineering - colleges if not a reputed one. However, a better focus on your studies in the related science - subjects followed by assistance of a renowned coaching - institute in order to nurture your basics will pave the way to your success in the competitive test of the premiur institution.
Don't be disheartened that there is oversaturation in this field but still there are scopes for advancement if you opt for Robotics and Artificial - intelligence along with other computer subjects.
In case, you fail to qualify in the tests conducted by established institutions, you can take up B.Sc course and later take up MCA course with a good institution by qualifying the written test arranged by such institutes.