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Q: 

how to find out duplicate values in xml file using any mehod in blackberry

I have xml database.In that database we stored 400 questions.i want retrive that questions randomly.not repeated same questions. i want retrive unique randomly questions.

      This is quize type test questions.I am testing each time 50 questions .similarly 8 times i testing randomly.The questions retrive randomly .                
       what i am asking is that questions are not repeat in the test.  please help me.

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