I've made a version of this program before, but with a few extra features you might like to consider (many depend on what the questionnaries involve and your preferences on these matters).

• one question per page
• different correct/incorrect responces for different answers you picked
• arbitary number of answers per question
• weighted answers for degree of rightness
• questions selected from a pool, so redoing the questionnarie will show mostly/totally new questions
• multiple questionnaries available through the same program
• browser based configuration of questionnaries, questions and answers to allow non coders to admin tests in a user friendly manner
• a relational database to make all the above possible while retaining code sanity

Of course none of these things are at all necessary, they just add to the feature list/novelty/usefulness/etc...