how were questions are they hard? - if you can successfully pass K&B's 6.0 mock exams, i'm sure you'll pass the real exam.
How many drag and drop question did you get ? - i forgot. trust me it's not a big deal. although it's true that when you already answered the drag and drop questions, answering it again will erase your previous answer.
Which mock exam have you done ? - voodoo (1.x-1.4), inquisition (5.0-6.0) and K&B 6.0 mock exams and this. take as many mock exams as you can to get the feel of the exam.
Which is similar to real exam ? - it's true (what they said), the real exam is easy compared to mock exams.
3 hours is more than enough. drink a lot of water and just be