Rajasthan

Yes, you can get admission for B.Tech 2nd year, after conducting an examination called LEET, and on the basis of your rank, you can get the admission.

Apex College-Sitapura is the best college in my opinion, because my brother is also doing B.Arch from there. And also I've asked some of my friends about that and they also suggested this college for B.Arch.

The Pacific University, Udaipur rank is 487 against the 825 of Nootan University, Gujarat as per UniRank. Hence, you should go with Rajasthan.
Good luck.

For the detailed list of diploma colleges of Jaipur, please refer our link:
https://www.shiksha.com/engineering/colleges/diploma-courses-Jaipur
It has all the details you required.

For admission in NTT course, you need to have passed 10+2 from a recognised university.

Yes, you are eligible to get CSE in Poornima University.

Hi Nitish,
Mass communication and design, both are very diverse courses. The short-term courses related to this field are specific to the sub-streams. For example, there will be a different course for fashion, interiors, jewellery design and so on. Similarly, for mass communication, short-term courses will be like journalism, advertising, PR, radio, etc. Please mention your specific interest so that I can guide you better.

Yes, you can get admission in COEP or VJTI through ladies quota, but you cannot get ECE or CSE in these colleges. You must have compromise with your branch, if you want to take admission in these colleges.

Yes, Rajasthan University provides both the mediums.