APICET

As per your rank i.e. 7042 in AP ICET you have a little low possibility of getting a seat in Sri Venkateswara University.
However, u can apply for other universities.

No marks needed for sc st category. For general students min 50% marks out of 200 marks. There is specifically not mentioned sc.

There are many top engineering colleges in Andhra Pradesh. You get a good rank. As your an SC background you get admission in many colleges. I recommended Andhra University College to you which is one of the best college in Andhra Pradesh and India. You can easily get admission in that college.

Yes you can get admission for MBA in Chandigarh university. This university is best known for its placement. So you can choose CU for MBA.

You are eligible as per the cut off.

You are eligible as per the cut off.

No you can't as for admission in this year you have appear on this year.

Yes you can get nowadays many of students are switching their career.

You can choose Gems B-School, Jain University, KL University.

You can opt for many colleges such as ITER, Arka Jain, KIIT, NIT Rourkela, etc.