Final answer:
An ATT (authorization to test) is typically valid for a certain period of time, depending on the exam and testing organization.
Step-by-step explanation:
An ATT (authorization to test) is typically valid for a certain period of time, depending on the exam and testing organization. In the case of the ATT for certain professional certification exams, such as the Certified Information Systems Security Professional (CISSP) exam, the ATT is typically valid for 90 days. This means that once you receive your ATT, you have 90 days to schedule and take the exam before it expires. It's important to check with the specific testing organization or certification board for the validity period of the ATT for the exam you are taking.