You need to show some attempted coding that we can help with. Read the page linked to 'Posting code? read this!' below the reply box. I will say that this action should be controlled by your world object. So, it would be your subclass of World which you should attempt to do this and whose attempted code you should be showing. This page explains how to correctly ask for help.

I 've made ​​it using an image to one question , but the problems that exist in this quiz does not appear random and its users can answer this quiz to memorize answers before her , and that makes this game is not effective , what can you give examples of other scenarios this quiz game about ?

Normally, the questions and answers would be listed either in an array or a list object within a class that extend the Object class (as such, what class it extends does not need to be specified). Then, within that class, an int field would be used to track the index of the current question and optional answers. The value of this int field can be set as a random number limited to the length or size of the array or list. Methods within the class can be created to change the current question and get the necessary data for the current question. It would take an extra field or two and more methods to avoid the same question from being selected a second time (or multiple times) before all questions are exhausted.

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That would depend on how you store the question, answer and options in fields.