The National Institute of Engineering Mysore Answered Questions

I hope you are asking this for eligibility marks to get into NIE. So on considering KCET exam ranking spreads from 1500 to 10,000. For computer Science branch and for general catagory students rankings range from 1500 to 4000. A good PUC marks will help you get higher rankings in KCET apart from KCET test as 50% weightage is considered. From COMEDK catagory you can get with 7000 ranking to 15000.

As you have not mentioned any particular NIT, so I am assuming you want a rough idea on at what rank you will get admission in top 5 NITs for ECE branch.
Here is the general category's home state and other states ranks, respectively.
NIT TRICHY- 8128, 3022
NIT Warangal- 4689, 4671
NIT Suratkal- 8383, 4151
NIT Allahabad-8622, 7138
NIT ROURKELLA- 13002, 5059

The cutoff of NIE for CSE (General Merit) through KCET last year was 1872 in first round 2000 in second round and increased to about 3000 in second extended and casual round.
In the previous years as well the cutoff was 2979, 3156, 2699 and hence within the 3k mark. The opening ranks will be as high as 1.2k to 1.4k. (This is just regarding GM category)
For further information refer KEA website by going through the cutoff section.

I am not getting why you want to join NIE Mysore. Better you prepare for NIMCET for few months and clear the competitive exam. Based on your score, you will get prestigious institutes like NIT Trichy, NIT Surathkal, NIT Allahabad, etc.
Otherwise below is the detailed information:
50% Candidate must have passed any recognized BCA / Bachelor degree in Computer Science Engineering or equivalent degree and obtained an aggregate minimum of 50% marks (45% of marks in case of SC, ST and Category-I of Karnataka candidates) taken together in all the subjects in all the years of the Degree Examination from any recognized institute/university. OR Candidate must have passed B.Sc. / B.Com / B.A. with Mathematics at 10 + 2 level or at Graduation level (with additional bridge courses as per the norms of the concerned University) and obtained an aggregate minimum of 50% marks (45% of marks in case of SC, ST and Category-I of Karnataka candidates) taken together in all the subjects in all the years of the Degree Examination from any recognized institute/university. Final year students can also apply on provisional basis

 Going by a comparative analysis based on placements, UVCE will be better for the mechanical branch. Both the colleges are academically very good. The placements for the mechanical branch is UVCE is very good. The placement percentage is nearly 60-70%. The lowest salary offered is nearly INR 3.5LPA and the highest salary being offered is INR 39LPA. University Visvesvaraya College of Engineering is a great college. Placements: In the year 2018, about 80-90% of the students got placed from branches like CSE, ISE and ECE. About 60-70% of the students got placed from core branches like mechanical and electrical. Hope it helps.