Hello Nithin,

Karnataka Examinations Authority conducts the KCET for admissions to various engieering courses in colleges of Karnataka. The eligibility requirements must be thoroughly checked before applying for the exam. 

As for your question, the colleges of Bangalore are the top notch ones in Karnataka and hence require very good ranks. I am mentioning the top colleges and their cut off ranks(General category) in Computer Science and Engineering:

RV College of Engineering - 798

MS Ramaiah Institute of Technology -  3639

BMS College of Engineering - 1099

For more information, follow the below link:

Https://engineering.careers360.com/articles/kcet-cutoff