Sorry, but asking questions is not autistic. What it comes down to, at least in your potential situation, is that they are incompetent to define their statement accurately. It is easy to deliver a diagnosis without providing the information. That your psychologist or others around you would say you are autistic and not even be able to describe what they mean by that is confusing not only to people on the spectrum, but to neurotypicals as well. Whoever told you that asking questions is autistic behavior is untrustworthy and ignorant.
Someone who is autistic is in a spectrum that is so broad and varied that the old definitions like Asperger's or Atypical Autism are now known as ASD. Of course there are certain characteristics that appear very often in many people, but it is often very difficult to identify and not always the case that it ever happens.
It is not how an autistic person acts, but what goes on inside them that defines them as autistic.
To describe it more precisely, every person is different, even autistic people. Autism does not define your personality, your personality is what defines your autism. This is why it is often difficult to diagnose. There are people who are extroverted or introverted, who are impulsive or more on the shy side. Your temperament is pre-determined and your character is constantly changing throughout your life, these two things make up your personality. Your personality then comes into contact with your autism, which has different degrees of severity, which in turn has so many different types of outcomes what other people may see or how it impacts yourself.
This is how my therapist, who works with people who are on the spectrum, told me what it means to be autistic and how difficult it is to pinpoint. Since i did not have the typical "symptoms" that define autistic behaviour.
EDIT: Edited some things since my mind is blurry and i lost the train of thoughts.