Hello Aspirant,

Hope you are doing well, As you've mentioned that your engineering ranking  in kcet 2021 is 42000, with this rank your chances of getting CSE seat in top colleges are low, But yes you can get other branch seat in good college. Here are the colleges in Bangalore where you have good chances of getting seat through kcet based on your rank:

Dayananda Sagar College of Engineering, Bangalore - BE Telecommunication engineering, Mechanical engineering, Civil engineering

Bangalore Institute of Technology, Bangalore - BE artificial intelligence & machine learning, civil engineering

Nitte Meenakshi Institute of Technology, Bangalore - Mechanical engineering, Civil engineering

BMS Institute of Technology and Management, Bangalore - Civil engineering, Mechanical engineering,

RV Institute of Technology and Management, Bengaluru - Mechnical engineering

RNS Institute of Technology, Bangalore - electrical & electronics engineering

BNM Institute of Technology, Bangalore - Electrical &Electronics engineering

Sir M Visvesvaraya Institute of Technology, Bangalore - BE Telecommunication engineering, Civil engineering

You can predict your college for KCET 2021 by following link based on your rank:

All the best!

Hope this helps you