Hello,

Although in Delhi so many engineering colleges are present which are goverment. So if you want to join government engineering college you have to give entrance examination which is JEE Mains examination. This is all India engineering and architecture entrance examination. If you qualify this examination then you can give JEE advanced examination for join IITs college. So for this reason you have to prepare yourself from 11th class dear. Because syllabus including 11th and 12th mathematics, physics and chemistry. Mcq questions are there and it's pen paper mode occur. From this year four times in a year this examination occur. So just be prepare yourself for examination dear.

I'll provide you a link below you can check it for more details about the college

https://engineering.careers360.com/colleges/list-of-government-engineering-colleges-in-delhi

All the best.