For NIET there are a total of 2 admission procedures which are as follows.

On-campus: 

Visit the campus with your academic transcripts, i.e mark sheets of 1oth, 12th, etc. Let the officials know that you are interested in taking admission for CSE. You may have to take a test to do so. These tests are usually quite easy. Also, just a tip I got from my friends at the institute that good communication skills in English go a long way there. 

College Counseling: 

Clear a competitive examination, like AIEEE, UPTU with good rank and choose the institute for counseling. You can also select the college based on your Mains score. 

Here is the required UPSEE cutoff for CSE in recent years.

Hope this was of some help.

My brother is from LNMIIT so I can tell you why LNMIIT is a better choice.

Ranking and Accreditation:

LNMIIT holds 2nd rank among the best IT colleges in Jaipur and 3rd best private college in Rajasthan. LNMIIT is approved by AICTE and has also been accredited by NAAC with a grade 'A'.

• Admission: It is a “Non-Profit” Institute and admissions here are based on JEE (Mains). There is no reservation policy. Every student is treated equally based on their performance.

• Facilities: Facilities like infrastructure, hostel, mess are much better than IIT Kota.

• Placements: The Highest package offered in IIIT Kota is of about 27 lakhs/year whereas in LNMIIT it is 36 lakhs and the average salary package offered is around 10.48 lakhs and still increasing.

• Clubs and Extra-curricular: There are various clubs and extracurricular activities present on campus. All the clubs are actively involved in various kinds of sports, technical and cultural activities.

• Fest: Every year LNMIIT organizes one of the biggest annual Techno-cultural fests, i.e. “Vivacity”.

• Coding Culture: The coding culture of LNMIIT is really amazing, even better than IIIT Kota. Every month, different types of coding events on CodeChef, Hacker earth are organized by the coding club of LNMIIT.

Alumni Network:

IIIT Kota is a recent IIIT and yet to establish a strong alumni database. Whereas, LNMIIT has a very strong Alumni base, including some notable personalities like Hemant Purohit (Assistant Professor at Information Sciences and Technology at George Mason University, Washington DC), Sanjay Goyal (Senior Engineer at InterDigital Labs, Tandon School of Engineering at Brooklyn, USA), Radhika Loomba (Research Scientist at Intel Labs Europe) and so on.

The video comprises an honest review of LMNIT

These are some of the perks of attending LNMIIT. Now, you can compare the institute with IIIT Kota and decide.

IIT Delhi is one of the top engineering institutes in India and is known for its Computer Science and Engineering program. According to various rankings, it is considered to be one of the best in the country.

• Unlike the faculty of other departments of IIT Delhi, this department has the most approachable and friendly faculty
• There are no compulsory attendance rules but the classes are interesting enough to attract students automatically 
• Extensive research work in the department has made it one of the best departments of the Institute 
• The peer groups are geniuses who are extremely hardworking and always ready to achieve the best.

Apart from Delhi, CS department of these institutes is also very good and reputed

• IITK CS: It has an excellent reputation with the best AKS Primality algorithm.
• IITB CS: This boasts of excellent alumni like Narendra Karmarkar
• IIIT-Hyderabad CS: This institute lays great emphasis in its course structure on coding