Engineering

According to most reviews placement from the college is decent but is does depend a lot on your CGPA because you only get to sit in the interview of the big companies if you have a good CGPA otherwise you may end up being selected by a start-up or mediocre company.
Overall, you can say it does have a decent placement but it won't justify the heavy fees you pay.

Yes, you will get the benefits of both. EWS and girl's reservation also.

You may check these links :
https://www.shiksha.com/college/mvsr-engineering-college-ranga-reddy-20628
https://www.shiksha.com/college/mvsr-engineering-college-ranga-reddy-20628/admission

CMR Technical campus is best for all the branches. The college is good and famous for its placement. According to my knowledge, I think you are going to get a seat with your rank. However, before applying for counseling, go and check on the college website.

You have to upload the first half of the class 10 marksheet in which your name and date of birth will be there. There is no issue in it as it is not possible to upload the whole marksheet in one document. No need to worry.

No, you cannot take admission in this course because for this you have to pass in 12th with the science stream.

Please go through this link –
https://www.shiksha.com/b-tech/ranking/top-electronics-communication-engineering-colleges-in-Hyderabad/45-2-0-702-0

Both the branches have their own importance but ECE is better in terms of placement.