sun? (um, i guess that\'s the only one java certificate)
all multiple choice questions, not sure where to take the exam here, but i remember for scjp, only 1 exams, for scjd, probably 3 exams, and u have to pass scjp first before taking scjd
i took that 5 years ago in china, not very difficult. there are tons of simulative exam online, try google it.