JEE

NCERT is not enough to crack JEE Mains and Advanced. NCERT only helps you in chemistry only but not in physics and maths. For physics, you should go through HC Verma.

RD Sharma is good for building concepts. But for more questions, you should go through Engage.

Sorry, but commerce students are not eligible for it.

You need to have a rank under 3000 to get admission in this college.

The major difference is-
IT deals with softwares whereas CS has both hardware and software.

Results will be declared in the 3rd or 4th week of May and there will be 3 counseling attempts.

Nope. JEE is not necessary for becoming a pilot. To become a pilot, you have two choices:-
1. Through Indian Air force (free as you train with IAF).
2. Through Flight school (will range from 30 to 60 lacs).
There are various institutes in India who trains pilot. For flying commercial aircraft, you need CPL (commercial pilot license). After that, you need to do type rating on an aircraft before joining airline as a commercial pilot.

You don't need to write JEE or DCET.
You are eligible to apply for a lateral entry. But not all colleges have such window. Look for a college that have a window.

No.
NATA is much more than enough. But, the educational government is like all CET will be cancelled and JEE is a compulsory exam.

She should consult HC Verma and NCERT books.