Computer Engineer

There are multiple job opportunities available in the field of IT. As per NASSCOM Indian IT Industry revenues grew by 13% in FY2015 and it added 2,30,000 employees in FY15. NASSCOM has forecasted that IT industry exports will grow by 12-14% and domestic market by 15-17% in FY2016 ( Actual data is yet to be released. Indias IT-BPM industry is projected to grow ~8% in FY2017 to USD 154 billion. In light of the very disruptive emerging technologies, the industry is re-imagining itself to become the Digital Solutions Partner for the world. CSE & IT grads from top engineering colleges have excellent career opportunities.
Following are the option to become Software Engineer after 10+2 :
(a) BTech CS or BTech IT
(b) BCA
(c) BSc CS or BSc IT
(d) Diploma in Computer Science
(e) Training from training institutes.
Following options are available for any graduate to become software engineer after graduation degree if candidate had Maths as subject in 10+2:
(a) MCA
(b) MSc CS or MSc IT
Any engineering graduate can appear in GATE examination and do MTech Computer Science to become a software engineer.

Hari, it is not the subject that will get you a job in ISRO but your hard work. To become a computer engineer go for B.Tech CSE.
The most important thing is the university/ college that you choose for your degree. These days we have many good government as well as private universities like IITs, IITTs, NITs, LPU, SRM, etc offering admissions in B.Tech CSE. Some of them offer admission just on the basis of tests like JEE and some offer you direct admission too on the basis of your marks in previous qualifying exam and some offer admission on the basis of their own tests. So, you can check the websites of these universities to know the course and fee details.
Good luck.