courses to become a Engineer

It will take 4 years.

According to me, if you score 60% marks in PCM, then better give Maritime exam. If you get selected, then do your marine engineering after class 12th, or else if you are not selected, there are so many good institute who will provide you marine engineering. I think, you better join Marine College after class 12th only, because you will get much more benefited and you will save your time in doing B.Tech, then you can go for post-graduation.

The best option to be in the field of computer is B.Tech CSE. Other recommended option in order of precedence are as follows: B.Tech IT, BCA-MCA , B.Sc-M.Sc CS/IT, computer Certification, short term computer courses.

Hi Aju,
Mentioned below are some of the courses that you can pursue:
CATIA V5 (running well as of now), AutoCAD (best tool before CATIA), solidworks, Pro E, Hypermesh, ANSYS, UNIGRAPHICS (current trend).
Stick to the basic tools first like AutoCAD and solid edge and then big tools like CATIA and UG as they can be learnt easily (as far as designing is concerned). If you are interested in analysis Ansys, CFD and hypermesh then go for them as they are the best tools to get trained.

B.Tech electronics & telecommunications engineering (ECE) is the preferred educational qualification for a job in telecom industry at junior management levels. Diploma in ECE is entry qualification in supervisor roles. ITI in electronics is entry qualification for technician in the telecom industry.

Yes, you can definitely pursue computer science engineering if you had PCM + economics in class 12th. If you wish to pursue a career in computer science engineering, you must apply to one of these colleges for bright future:
IIT's
PEC university of technology, Punjab
Bengal institute of technology, Karnataka
UTM, Shillong