1. I would recommend you to give yourself a little longer time to study since you have not started KB book yet, that book is a must.
2. In the test I took, there is nothing about it, I have not looked at the SCJP requirements, but probably some can confirm it.
3. you will get multiple choices as well as DnD questions, be ready for both kinds.
2. No Swing concepts required for SCJP.
3. Also you are not required write the programs there. But the Drag N Drop questions will be somewhat closer to writing one program (less challenging than writing a complete program though)