my sister wants to do B.E but she fails in 12th she wil get certificates in november pls wil her join B.E in december in andhrapradesh

Sorry, It is not possible. Wait 4 next year.

I dont think so because this is the time for 1st sem exam in most of the universities so how could they take admission at the time of exams. but you may contact with college administration in your nearby area as if they give admission before getting marksheets or wait and prepare for next year admis