Engineering Entrance Exam

It generally starts from month of November to first week of March.

DTU is a better college than NSIT because DTU provides good/helpful faculty members, course curriculum, good placements, infrastructure and computer labs also.

If you are not a Diploma certificate holder then you can't get DTU without appearing in JEE Mains exam.
If you have Diploma then apply for LEET entry exam.

To get admission in DTU you need to have passed class 12th with PCM and should have a good score in JEE Mains paper. Then you have to apply for JAC Delhi counselling. Then fill the branches of DTU first, if allotted, you will get the admission in some branch.

https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=7489993
Above link will take you to Shiksha college predictor, and you will get all the answers.

Hello Vivek,
Cutoff rank of NSIT for 2018 is given below:
Round 1:- CSE (37.4k), IT (40.6k), ECE (50k).
Round 2:- CSE (45.7k), IT (48k), ECE (75.7k).
Round 3:- CSE (46.7k), IT (48.7K), ECE (90k)
Round 4:- CSE (46.7k), IT (54k), ECE (93.5k)
Round 5:- CSE (46.7k), IT (66.6k), ECE (97k).
Round 6:- CSE (48.7k)

Please visit the link for perfect answer https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

Yes, you can get admission. NATA is not mandatory, you can get the architecture college from JEE also.

Why don't you want to go for FIITJEE? Other than FIITJEE, you have options like Aakash, Allen or Resonance.

You can check on the official website of the college you are looking for, or the official website of the institute taking the exam also there are several other websites you can check on, you just have to google.