DCET

Yes indeed. KCET is the entrance exam for lateral admission into the second year of engineering conducted by Karnataka government via KEA. I am attaching a link that will give you all the required information about different aspects of the exam. https://www-shiksha-com.cdn.ampproject.org/v/s/www.shiksha.com/b-tech/amp/dcet-exam?amp_js_v=a2&_gsa=1&usqp=mq331AQA#referrer=https://www.google.com&_tf=From %1$s&share=https://www.shiksha.com/b-tech/dcet-exam
Best wishes to you.

As per the eligibility criteria of Second division assistant (SDA), you must have passed IInd PUC / 2yrs ITI / 10 + 2 (CBSE / ICSE) / 3 YEARS Diploma Examination. 12th examination conducted by Open University will not be considered. The eligibility criteria for First division assistant (FDA) a candidate must be hold of a Degree from a University established by law in India. While if you are asking about UPSC (Union Public Service Commission) instead of UPSE than this exam also required a Bachelor degree. So from above you are only eligible for SDA exam.

Through lateral entry, student get direct admission in the second year. If you have completed Diploma, then you can get admission through lateral entry for B.Tech.

Hi Bharat,
Yes, you can join navy (navigation) as your degree is completed. Generally the minimum criteria is 60 percent in your graduation. And you need to clear the entrance exam for the same.
Best of luck.