Exam

It's not mandatory 2 appear in advance.
Bt if u have decided 2 take a drop n prepare 4 jee advanced. then giving advanced paper will b beneficial 4 u. u may get good idea. n gain some confidence. n also. know about ur mistakes.

sorry u r not even eligible for counseling in dtu
coz u haven't clear the jee mains exam at all
.
if u r from reserved categories like ine from Sc/St u may definetly get admitted to one of the branch in dtu
pls upvote

Nit surathkal
nit warangal
nit trivanthapuram
nit silchar
nit srinagar
these nits are top most nits
as ur marks 215 in jeeains which fullfill the needs of these nits for admission criteria
u may definetly get admission in one of these.
pls upvote

Two ways.
-Join a good coaching institute
-Self study
Bt in both cases u have 2 work hard continuously.

go for Josaa counseling
u will definetly get one of the NIT.
also apply 4 home state colleges it may be beneficial to u
pls upvote

CS are those who make and devlope software and IT are those how uses that software.

jee mains and advance is extreme in india

Yes you are eligible to appear in GATE. you should visit the website of IITs for syllabus,eligibility criteria. if you secure a good rank in it you will get admission in IITs, like IIT roorkee

If you want to do job in the industry than after some years you required a master degree, for managerial post sometimes MBA is the best choice but m.tech is a core field and you spend four year so you can do in the engineering itself unless you got a very precious business school like IIMs, xlri, MD