Well, there is syllabus available. They have specified what skills they would mesaure via this exam. Look here:
http://www.microsoft.com/learning/en/us/exam.aspx?id=70-563#tab2[
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I am not sure what you mean by SOURCE material for exam. If you mean DUMPS, that is highly NOT RECOMMENDED.
P.S. : Why are you going for 3.5 Exams now? MS has already come up with certifications for 4.0/4.5 framework.