KCET

KCET (Karnataka Common Entrance Test) and KEAM (Kerala Engineering Architecture Medical) are both state-level entrance exams conducted for admission to various undergraduate courses in engineering, architecture, and pharmacy in the respective states of Karnataka and Kerala. There are some differences between the two colleges when it comes to difficulty levels and cutoffs:
Difficulty Level: The difficulty level of KCET is generally considered to be moderate, with questions mostly based on the State Board syllabus. On the other hand, KEAM is known to be a bit more challenging, with questions covering a wider range of topics. Cutoffs: The cutoffs for both exams vary depending on various factors such as the difficulty level of the exam, the number of candidates appearing for the exam, and the number of available seats. However, in general, the cutoffs for KEAM are higher than KCET due to the higher difficulty level of the exam. It is important to note that both KCET and KEAM are highly competitive exams, and the cutoffs may vary from year to year depending on various factors.

Based on your KCET rank of 18k, you may have chances of getting admission to some of the mid-tier engineering colleges in Bangalore. Some of the colleges you can consider are:
BMS College of Engineering
RV College of Engineering
PES University
Dayananda Sagar College of Engineering
New Horizon College of Engineering
It's important to note that admission to engineering colleges also depends on other factors such as the cutoff scores for your preferred branch of study and the number of seats available in each college. Therefore, it's recommended to check the previous year's cutoff scores and visit the respective college's website to get more information about their admission process.

The admission process for CS and EC courses in different colleges through KCET may vary based on several factors such as the number of available seats, the cutoff ranks of the college, and the number of students applying for these courses. So, it's not possible to predict with certainty whether your cousin will be able to get admission to a CS course or you will be able to get admission to an EC course based solely on your KCET rankings.
However, based on previous year's admission trends and cutoffs, it is possible to get an idea of the chances of admission. Generally, a KCET ranking of 55,000 may be sufficient to get admission to a CS course in some colleges, while a ranking of 67,000 may be sufficient to get admission to an EC course in some other colleges.
It's recommended that you and your cousin check the cutoff ranks for CS and EC courses in the colleges you are interested in and compare them with your respective KCET rankings. You can also consider participating in the counseling process to explore all available options and increase your chances of getting admission.

I don't have access to specific information about colleges or their admission processes. It's also unclear which college you are referring to in your question.
However, generally speaking, admission to engineering programs depends on various factors such as the number of seats available, the number of applicants, the cutoff score, and other eligibility criteria set by the college or university.
If you have the cutoff rank or score required by the college for electronics and communication engineering, you may have a chance of getting a seat. But, it's best to check with the college's admission department or visit their official website for more information about the admission process and eligibility criteria.

I cannot predict the exact college you might get based on your rank. However, based on the previous year's cutoffs, with a rank of 68,000 in KCET you may have a chance to get admission in some of the engineering colleges in Karnataka. Some of the colleges that you could consider for admission include:
Acharya Institute of Technology, Bangalore
JSS Science and Technology University, Mysore
KLE Technological University, Hubli
Siddaganga Institute of Technology, Tumkur
Nitte Meenakshi Institute of Technology, Bangalore
BMS Institute of Technology and Management, Bangalore
Dayananda Sagar College of Engineering, Bangalore
Reva University, Bangalore
PES University, Bangalore
Christ University, Bangalore
However, I would advise you to check the official website of the Karnataka Examinations Authority (KEA) to know the actual cutoff ranks for the colleges and branches that you are interested in and also to participate in the counseling process for admission.