It takes 4 year duration for BE/ Btech courses and 2years for ME/Mtech courses for Computer scienece engineering.

Mtech is post graduate course for indepth Specialization.

You can also take up distance Engineering colkeges, however they arenot recommended since they lack indepth coverage of syllabus.

To know moreabout scope, Subjects, Colkeges and job opportunities at Computer scienece engineering check below mentioned link:---

https://www.careers360.com/computer-science-engineering-course

Engineering in India is generally for 4year duration across majority of colleges.

Only some colleges like NMIMs, CEPT University, accept 5 year duration.

Whereas colleges like IIMTS ofders distance or correpsonding Engineering degreekf 3year duration.