With a KCET rank of 21870, you have a fair chance of securing a seat in the Computer Science (CS) stream at several colleges in Karnataka. While top-tier colleges might be challenging to get into, there are still good institutions where you can pursue your CS studies. Here are some colleges you might consider:

1. Dayananda Sagar Academy of Technology and Management (DSATM), Bangalore :

   • Known for decent placements and infrastructure.

2. JSS Academy of Technical Education, Bangalore :

   • Offers good faculty and industry exposure.

3. Nitte Meenakshi Institute of Technology (NMIT), Bangalore :

   • Reputed for its CS program and campus facilities.

4. Reva University, Bangalore :

   • Provides good academic and extracurricular opportunities.

5. Acharya Institute of Technology, Bangalore :

   • Offers robust CS programs and has a good campus environment.

6. RNS Institute of Technology, Bangalore :

   • Known for its faculty and placement support.

Steps to Take:

1. Participate in Counseling :

   • Ensure you participate in the KCET counseling process and list these colleges among your preferences.

2. Stay Informed :

   • Keep track of the counseling schedule and updates from the Karnataka Examinations Authority (KEA).

3. Consider Backup Options :

   • Be open to considering other engineering streams or newer colleges if necessary.

By actively engaging in the counseling process and being flexible with your choices, you can secure a seat in a reputable institution for the CS stream.

hope this helps you!!