How do you prevent [...]

How do you prevent ... [content removed by moderator]

Where are these questions coming from. Looks like a test, but from where. We do not allow copyrighted questions to be posted here, so we need to clear up where they came from. Did you get them from the Spring Certification exam. They look similar to the questions on that exam, but not a question I have seen on the exam, but really close.

Mark