Civil Engineering

All courses abroad or specialized one. You can do PG Diploma or PG in:
Construction management
Structural engineering
Geo technical engineering
Go through few university website and see the course options.

If you want to take lateral entry in civil engineering, then you should have at least above 70%, you can only take lateral entry in same university only.

Yes, of course. You can apply for the same. Before join it, do a computer course related to it. Good luck.

You can refer the link for all the details-
https://www.shiksha.com/college/karnataka-state-open-university-lucknow-36021

Apart from IITs and NITs other best civil engineering colleges are:
Thapar University, GNDU, Amritsar
GNDEC, Ludhiana
Chitkara University, Chandigarh
LPU, JalandharVIT, BIT-Mesra/Pilani Campus
You can refer the below link for other best civil engineering colleges-
https://www.shiksha.com/b-tech/ranking/top-civil-engineering-colleges-in-india/53-2-0-0-0

Some of the top universities in Germany offering MS in Environmental engineering are as follows:
1) RWTH Aachen
2) Technical University Braunschweig
3) Technical University, Hamburg
4) Technical University, Munchen

There is no comparison between these two for B.Tech study. No doubt, Chitkara University is a leading University in North India. Chitkara University ranked highly for the teaching approach, industry exposure and excellent research study by education experts. University ranked 4th among top Indian Universities for patents filing, See the report:
http://www.chitkara.edu.in/news/chitkara-university-ranked-4th-among-top-indian-universities-filing-46-patents-per-ipr-annual-report-2015-16/.

It depends on the home state and category. If you belong to any respective NIT's home state, you can easily get a seat. But in other state case you can get mechanical and civil in NIT Puducherry and civil in NIT Surathkal.