In usability evaluations questionnaires are written
lists of questions that distributed to users. Questionnaires
differ from surveys in that they are written lists, not ad hoc
interviews, and as such require more effort on the part of your
users to fill out the questionnaire. Often, questionnaires are
used after sites are launched to assess customer satisfaction with
the product. Such questionnaires often identify usability issues
that should have been caught before the site goes live.
Questionnaires are an inexpensive way of gathering a great
deal of information from a large number of users.
Using an incomplete or outdated DOCTYPE - or no DOCTYPE
at all - throws browsers into "Quirks" mode, where the
browser assumes you have written old-fashioned, invalid
markup and code.