Just a quick post to share with you my past Salesforce Dev401 Exam study materials. I have assembled this table of 87 questions when I was studying for the exam back in January 2011.
These are not actual Exam questions, don't be fooled!
This is study stuff that I have compiled reading the study guides and the available training materials I found online. It did help me pass the exam. The quiz like questions I compiled helped me a lot to understand concepts and limits.
I have also tried to categorise the questions & quizzes by the Salesforce Dev401 study guide syllabus.
Here is the link to the questions: http://apex-outsource.com/pls/apex/f?p=309:Dev401
Hope it helps!