What is the difference between a factual and an interpretive question?

The difference between between a factual and an interpretive question is that a factual questions has only one answer and it must be a fact. An example could be: "What is your favourite drink?", or "How old are you?". Interpretive questions are questions that have answers which are interpretations, but must be followed by an evidence. Another example could be: "Why do people believe in aliens?". These types of questions will help us with our research and the presentation itself, guiding us along.