Varuna Seneviratna wrote:Is there a prerequisite for the exam Oracle Certified Master, Java SE 6 Developer
Yes! You have to be Oracle Certified Professional, Java (SE 5, SE 6, SE 7 or SE 8) Programmer or Sun Certified Java Programmer (any edition). You'll find more info about the path to become an Oracle Certified Master, Java SE 6 Developerhere.
Varuna Seneviratna wrote:Is the step 2 which is 'Step 2 - Complete one of these courses.' a must to become a ( (Become an Oracle Certified Master) .
Is getting a training course needed to get the certification
Yes! You are required to follow one of the courses mentioned in this step. It's a mandatory step. You can submit the assignment and take the essay exam without following one of the courses. But the Oracle Certified Master, Java SE 6 Developer title will only be granted if you take one of those courses.