If one of your questions was flagged as 'Too Vague' and closed, it will still show up on your profile, with [closed] appended to the end.
If one of your questions was downvoted a lot, it'll kind of autohide itself. You should still be able to see it from your own profile page.
If all your questions are hidden, you wont see them. Or if they were deleted.
As for seeing whether you have any responses, a number will show up in the top left corner surrounded by an orange circle, letting you know you have a notification/response. Click the number, it'll open up a list of why you got that notification, you should see your question there (or at least a link to it)