1. Do the questions have multiple answers or a single answer ( as given in the IBM sample test) All the questions have multiple answers, just like
SCJP or IBM sample test.
2. If the multiple answers exist, do they specify how many answers to select as in JCP? NO.
3. What will be the general instructions displayed before the commencement of test( As in JCP)? Nothing important, just usual legal stuff - that you agree not to disclose the actual questions. You will also get to chose if you would like your name to be added to IBM's directory of certified professionals.
None of these agreements/declarations count for your final passing score!
It also has an orientation session that teaches you how to navigate between questions. It is optional.
Good luck,
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Ajith Kallambella M. Sun Certified Programmer for the Java�2 Platform.
IBM Certified Developer - XML and Related Technologies, V1.