Science Computer

Visit for details: http://www.btechadmission.co.in/
I've provided enough details regarding cutoff to save you plenty of time looking around. Assuming you already know enough about the two exams, I'll just mention important bits to know the difference between the two exams better.
Number of applicants in COMEDK'18: 72,152 (against 20,000 seats, out of which 18733 are reserved for engineering)
Number of applicants in KCET'18: 1,98,639 (against 19942 seats, out of which 16942 are reserved for engineering)
Both exams are different in the following ways:
More competition in KCET, compared to COMEDK.
Tough COMEDK, easier to get a good rank, whereas the opposite is true for KCET.
COMEDK colleges more expensive than KCET (this is because COMEDK has more private affiliation) [53,460 (KCET seat) and 1,83,600 (COMEDK seat)]
Reservations for SC/ST/OBC high in KCET, more seats for GEN in COMEDK.
Outsiders not allowed to write KCET, whereas COMEDK is all-India EE.
Keeping the above points in mind, let's look at the cutoffs.
Visit for details: http://www.btechadmission.co.in/
Generally, the closing rank in KCET for RVCE:
Civil: 3354
CSE: 573
ECE: 798
EE: 622
ME: 584
Now, COMEDK for RVCE:
Civil: 3199
CSE: 180
ECE: 390
EE: 732
ME: 829
From the above tables, we can suppose that KCET which see a number of applicants higher than that of COMEDK, but yet latter has a similar cut off as KCET but for less number of candidates. Although one can't exactly tell what should be your rank to be able to get a seat in RV college of engineering as the last year cutoffs can't exactly predict your chances as the cutoffs are based on so many factors so it isn't ever constant.
Visit for details: http://www.btechadmission.co.in/
But to be on safe side, its best if you have:
Civil: 2500 (COMEDK), 2700 (KCET)
CSE: 150 (COMEDK), 300 (KCET)
ECE: 300 (COMEDK), 300 (KCET)
EE: 600 (COMEDK), 500 (KCET)
ME: 700 (COMEDK), 500 (KCET)

As I don't know about the other institutes that what they are providing or what sort of education system they have but for the Lovely Professional University- LPU. I can share some facts regarding it-
LPU is the best private university to go for B.Tech, it is one of the top 5 universities of India, providing quality education, innovative pedagogy and unbeatable placements both national and international. LPU provides a great academic exposure to its students. It provides a chance to the students to attend guest lectures or workshops, so that they get to learn as much as they can. The students also work on live projects, so that they are able to apply their knowledge to practical settings. It is one of the few that has embraced international practices when it comes to designing a curriculum. Instead of using old school books and lectures, LPU has experimented with books, interactive problem-solving interactions and working through real-world applications. LPU provides ample opportunities to each and every eligible student to secure good placement with the help of a dedicated Division of Career Services. The university has been ranked high by various outer agencies with regard to placements. LPU is conferred with National Employ-ability Award 2020 by Aspiring Minds for the 7th time in a row for having Most Employable Students and being one among the top colleges and universities in India with one of the highest Employ-ability rates. Companies which recruit from IIT's, Iims also recruit the students of LPU. Companies like Microsoft, Google, Oracle, Amazon, Cognizant Technology Solutions, TCS, Tech Mahindra, Amdocs, Capgemini, Verizon, SAP Labs, Qualcomm, Drishti Soft Solutions, L&T Infoetch, Tek Systems, Alight Solutions, Tivo Corporation, Wipro, Interviewbit, LG Soft India, Click Labs, PEGA and many more visit lpu for placement of students.

Firstly you are Eligible For the JEE mains Exam. Through JEE mains Rank/Percentile You got the different NIT's. Now If you get any percentile above 95 or RANK under AIR 9500 you are able to get into the NIT's with computer science Branch. Although Cutoff is something which changes year per year But you have to go for at least above 95 percentile or Rank under AIR 9500 in JEE mains exam for computer science Branch in NIT Jamshedpur.
Now I am sending you an authentic link through which you get information related to the cutoff for computer science branch in NIT JAMSHEDPUR
Here is the link-https://www.shiksha.com/college/nit-jamshedpur-national-institute-of-technology-24366/cutoff