Validating a Questionnaire??

You'll have to check with your instructor or course materials to find out how they want you to validate it. There are different types of validy, different methods to use, etc. You can spend months validating a questionnaire -- or you can spent an hour if your standards aren't as high.

You'll need to ascertain and meet the standards of your course instructor. We can't tell you what those standards are. You'll have to ask her/him. Sorry.