Final answer:
The truth of the statement depends on the specific rules of the administering institution or platform of the Mastery Exam; different entities have different policies on retake lockout periods.
Step-by-step explanation:
The statement regarding the Mastery Exam locking for a period of 48 hours after each failed attempt may be true or false depending on the specific rules of the institution or the educational platform administering the exam. Different exams and testing services have their own policies concerning exam retakes. For example, some online learning platforms may impose a waiting period to encourage students to review the material before reattempting, while others could have different or no such restrictions.
To find out the accurate policy for your particular situation, you should review the guidelines provided by the educational institution or exam service you are using. Each service may provide a student handbook or a FAQ section where they detail their policies regarding exam retakes and lockout periods.