The 18th question of the third blank PSPO exam sounds strange to me:
"Product Owners must create clear and unambiguous acceptance criteria for each Product Backlog item before it may be selected in Sprint Planning".
The correct answer is: false.
Why ? It is one of the PO's main tasks to write acceptance criterias when he create product backlog items, isn't it ?
..or the term "acceptance criteria" are not officially recognized as a Scrum requirement, since it's neighter recognize the term "user story " ?