Jain Deemed-to-be University, Bangalore

It's difficult to provide a definitive answer as admission requirements may vary by college and programme, and the number of seats available may also differ from year to year. However, I can provide you with some general information. DCET (Diploma Common Entrance Test) is a state-level entrance exam conducted by the Karnataka Examination Authority (KEA) for admission to second-year engineering courses in various colleges in Karnataka. Based on your expected score of 90 marks in DCET and 70% marks in your CSE Diploma, you may have some options for colleges in Bangalore. Some of the colleges in Bangalore that offer engineering courses and accept DCET scores include:
RV College of Engineering
BMS College of Engineering
PES University
Dayananda Sagar College of Engineering
New Horizon College of Engineering
Sir M Visvesvaraya Institute of Technology
Nitte Meenakshi Institute of Technology
Reva University
CMR Institute of Technology
Acharya Institute of Technology
It's important to note that admission to these colleges may also depend on other factors such as the number of available seats, the number of applicants, and the competition for the programme. I would recommend that you research each college's admission requirements and cutoffs to get a better idea of your chances of getting admitted. You can also consider reaching out to the admission offices of these colleges for more information.

Cutoff basically depends on the number of persons appearing for a given exam and the number of students who have filled the corresponding institute or college form. More is the number of students who have filled the admission form the cut off will definitely increase. But if the number of students filling the form is less than the cutoff will decline .
So it all depends on the number of students filing the form. Cutoff vary from year to year and at some times you may see that it may go higher while at some times it may decline and lower rank may take admission in the college.
So basically predicting the cutoff before it comes is difficult as it may vary this year but you can always predict the cutoff depending on the last year admissions.
So you can check the last year is cutoff . and i will provide you with the 2021 year cutoff and you can check the other year cutoff and can predict the cutoff of this year not surely.