Câu 5: CTAL-TAV4-0: Certified Tester Advanced Level - Test Analyst v4.0

Below is a state transition diagram that models the behavior of the component responsible for verifying the correctness of the PIN code entered by the user. The system begins operating in the “Welcome screen” state and ends in the “End” state. The system is supposed to allow three attempts to enter the PIN. If the user enters the correct PIN during any of these attempts, the system makes a withdrawal and terminates the operation. If the third attempt is incorrect, the system blocks the card and terminates the operation. As a test analyst, you review this diagram for possible defects that could be introduced into the system that will be created based on this model. What should be the conclusion of your analysis?

1. A. The system implemented according to this specification will work properly
2. B. The system allows the PIN to be entered incorrectly an arbitrary number of times
3. C. The system blocks the card after entering the correct PIN
4. D. The system does not block the card after the PIN is entered incorrectly three times — đáp án hiện tại