I really don't think it would be possible to develop DID without some degree of interruption in memory, but to what degree would vary from person to person.
I think almost any quiz that points to a specific condition, like this one, is likely to be fairly inaccurate. It's too obvious how to answer each question in order to get the result that you want. (not shooting it down, just sharing my personal opinion) I also think that many of the symptoms listed in the quiz could be attributed to many different types of psychological, emotional, or medical problems. If you feel you are experiencing some of these symptoms, and it is interfering in your life, or concerning you, then it would be best to discuss them with a doctor, psychiatrist, therapist, or social worker, if you're not already.