To see the questions that a particular person has asked:
Yes, they can; there are no secrets on WikiAnswers. Members can see all of your contributions.
The question you asked is inappropriate for WikiAnswers.
When you type a question on Wikianswers, the question will go under a category to the left called "My contributions." When you click that option, there will be a drop-down menu that allows you to click on "Questions (asked)." Once you click that, you can see all of the questions that you have asked as a user member on Wikianswers.
Because personal opinion questions could generate millions of answers. Specific questions usually have only one answer.
There is no specific 'Jokes Category' on WikiAnswers. But there are two categories called the 'Humor and Amusemet Corner' and 'The Most Amusing Questions Ever Asked On WikiAnswers' where you can post cheesy questions or silly, but not inappropriate questions. (See related links for a link to the categories)
this question
about 2 questions are asked per second.
There are so many questions on WikiAnswers that it is impossible to total exactly how many questions there are. Even now, questions are being asked, so the total will always keep changing.
yES
Questions that are asked never get deleted, unless it is against the rules of WikiAnswers. The question is permanently logged into the WikiAnswers databased, and never goes away.
If you are a registered user, go to "My contributions" on he blue panel on the left. Then select "Filter by: Questions (asked)". It will then list all the questions you've asked on WikiAnswers.
If you are a logged-in member (which is free and easy to set up) you can choose to get email updates when answers are given or edited to questions you have asked or decided to keep on your watchlist.