We do not have the feature you describe. There is nothing that detects questions as "too easy". In fact, there is nothing wrong with asking "easy" questions. What's easy to one person may not be easy for another. That's the whole premise behind a collaboratively-edited Q&A site.
There is, however, something wrong with asking questions that don't make any sense, that more closely resemble "assignments" rather than questions, that show no effort of research effort on the part of the asker, that cannot be reasonably answered, and that are not correctly formatted.
To this end, we do have a quality filter in place. You can read more about it, and how to compose your question to avoid tripping it, in the answer to this question.
Also, please see the FAQ for more information on the types of questions you can and cannot ask.
If you're still having trouble asking your question on Stack Overflow, please edit your question here and include the full text of the question you're attempting to post. We will be more than happy to tell you what's wrong with it and give you some suggestions on how to improve it.