Exam

It is in the college itself. Hazra Law College to be exact. But it might have changed. Do check it once before going there.

IET Lucknow seat matrix:
Total seats for 4-year B.Tech 480
Chemical Engineering 60
Civil Engineering 60
Computer Science and Engineering 60 Electrical Engineering 60
Electronics & Communication Engineering 60
Electronics & Instrumentation Engineering 60
Information Technology 60
Mechanical Engineering 60
Try

Talking about marks, last year:
IP - 148 ( general Home state )
CSE ( 188 )
IT ( 184)
MECHANICAL ( 160 )
CIVIL ( 155 )
ECE - 178
EEE - 170
Best of luck.

The last date of most of the universities in India will be over in the last part of this month. Some universities may continue till July. If you are interested to pursue it, you are advised to go through the information of your selected university immediately.

Both have their own career prospects. The old college has a very good experience but lack of new technologies while the new college has lack of experiences but having new technologies. You can choose anyone because both are beneficial for Computer Science Engineering.

Yes, if you have home state quota, you can even go till the CSE and ECE. Else, you are definitely up to ECE, EEE and rest all branches below. Last year's cutoff for CSE was 21 - 22 thousand for other state and around 24 - 25 thousand for home state CSE.
Best of luck.

You can do 12th from NIOS later if you want.

Visit CBSE official site and fill the form online. Payment can also be done online.

Hello Akash
You have quite good marks in JEE and COMEDK. Please visit the link below which tells you the best colleges accepting COMEDK score and it will provides additional information regarding courses. https://www.shiksha.com/b-tech/articles/popular-colleges-accepting-comedk-scores-blogId-10923.