Câu 15: CTFL-V4-0: Certified Tester Foundation Level (CTFL) v4.0

An anti-intrusion system is battery powered and is activated by pressing the only available button. To deactivate the system, the operator must enter a PIN code. The system will stay in alert mode within a configurable timeout and an alarm bell will ring if the system is not deactivated before the timeout expires. The following state transition diagram describes the behavior of the system: What is the minimum number of test cases needed to cover every unique sequence of exactly 4 states / 3 transitions starting and ending in the “Inactive” state? (note that “Inactive” is not a final state in the diagram).

1. A. 1
2. B. 2 — đáp án hiện tại
3. C. 3
4. D. 4