DTU - Delhi Technological University

You have no chance in DTU for CSE branch at this rank.

NSIT and DTU are good colleges after NIT, IIT and some IIITs. If you are not getting any NIT, IIT or a good government college, then go for NSIT or DTU.

No, qualification required is GATE.
https://www.shiksha.com/engineering/course/m-tech-delhi-technological-university-rohini-230259

No, DTU won't accept SC certificate issued by West Bengal government. Get a SC certificate under central government rules and regulations. A state undersigned caste certificate is valid in the particular state only. You need to get the caste certificate under the law of the government of India for admission in Central Universities and other states.

Hi Aman, yes, you can try for middle or lower order NITs like NIT Patna, NIT Jalandhar, NIT Jamshedpur, NIT Durgapur, IIITs, DTU. You can get a seat in these colleges. You can predict other possible colleges here :
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Best of luck.

Hi Anuj, yes, you can get admission in DTU through lateral entry once you complete your Diploma. Although the entrance will be tough but you can crack it if you work hard.
Best of luck.

EC/CS/EE will be the branches but the cutoff for them will vary.

Both are the good colleges of Delhi but according to placement, DTU is much better.

No, for that, you have to clear the entrance test for the lateral entry.