How can I DELETE my question or answer ?

You can only delete them if they have received no answers. Click on 'Edit', and then delete the question.

If the question has answers, the only real way to remove them is as violations. You will need to get friends and network to report. The easiest thing to do is go to the question and change the asker to anonymous. You will then be the only one who knows it is you. The staff in the past would remove one or two, but no longer.

to delete the answer, click edit on ur answer and click delete.

If someone has answered your question you can never delete it.