My formal assessment was a mesh of questions regarding autism, as that was specifically my purpose of the visit to a psychologist, but it was also a general questionnaire which covered topics like childhood trauma, BPD, depression, anxiety, and many other things.
The assessment took four hours, and part of it was me filling out bubbles of questions as well as written/spoken response, on which I'd elaborate if needed. Additionally there were previous forms which I'd filled out (I'd arrived to this diagnosis place very prepared because I was certain that I had autism, and wanted to be diagnosed not to be proven right only, but...just general validation because what if I didn't have autism? This was my fear).