Colleges in Vellore

Yes, please attend the counselling as you can get any course other than what you expect to get. Your fee may be a little higher as first 20000 candidates are offered the admission, first you will be called for phase 2 counselling.
Try your luck.

VIT University is a better option in comparison to your other choice if you are getting a similar branch in both colleges. You may opt for an institution where you get subject/ branch of your choice.

Vellore campus is very expensive.
Every one want admission in Vellore campus.
Vellore is first choice of students.
But, in second campus you didn't get luxury facility like Vellore .
So, students are not interested in second campus.
But, in education level both are good.
But, facility is weak point.

Yes, VIT offers B.Tech in mechatronics.

Yes, you should wait for the result. By the way, you got decent rank in VIT. You will get CSE with this rank in VIT University.

The better one is VIT-Vellore because it is widely preferred by the students for B.Tech and CSE. SRM is also good but if you get VIT go for it.
Both are good but the fee structure is a little high as they are private universities.
Salary packages depend on the candidate's skills and also the companies that offer core jobs. The candidates should have some additional skills to get placed easily.

Dear Kishore,
It's up to your and skills, of course, you can get good salary packages after doing M.Tech & B.Tech dual degree courses. I would suggest you to choose CSE branch.

VIT is a slot based system, so according to your rank, they divide you into the respective slots. There are 4 slots, each different in the fees. So, the rank of 1 to 20000 come in the first slot with scholarships, so probably you will get any branch in VIT, but it all comes down to the fees which You are going to pay each year.

24000 is actually a very good rank. So, you can get Hemicak Engineering in VIT Vellore.

You will be called for the phase 2 counselling. It means that you can have a seat but with a higher fee (may be category 2 or 3).
Phase 1 counselling is for those who get ranks between 1 and 20000.
So, you can get almost all the branches as you will be called at the earliest.
You can block the course which you are interested in but the admission and the course you prefer depends on the no. of seats filled and rankings.
As those who got ranks between 1-100000 are called for VIT counselling, there are good chances for you to get admission. If you don't get VIT-Vellore, you can surely get at VIT-Chennai, Bhopal or Amravati.
All the best.