Many Thanks

Thank you AnalyticsExam !!!!!
I just passed my real exam with 81%.
what is the same in AnalyticsExam and Real exam SAS A00-280:
1. very similar question sets.
2. very similar exam situation.
3. high reliability, high validity
4. Result record, which helps in know your progress. 
So, practice more and more, you can definitely get a good score.