Hello Everybody

I have gone thru the sites and also I have downloded the help from technet and also I am referring some books. Now I am working on oracle as Jr. DBA . But still I feel I should I go for the SQLPLUS and PLSQL exams as I have experience of working on them. Can you just let me know how I should prepare for it from the exam point of view. How much stress I have to give for advancements in Oracle 8i. I would like to know it for both SQL and PLSQL.

Thanks in Advance
Amol