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Exam CTFL v4.0 All Questions

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Exam CTFL v4.0 topic 1 question 140 discussion

Actual exam question from ISTQB's CTFL v4.0
Question #: 140
Topic #: 1
[All CTFL v4.0 Questions]

The following state transition diagram describes the behavior of a control system in terms of its possible modes of operation. The initial start state will be the “NORMAL MODE”.



Which ONE of the following test cases covers an INVALID sequence?

  • A. NORMAL MODE >> DIAGNOSTIC MODE >> DEGRADED MODE >> EMERGENCY MODE >> DIAGNOSTIC MODE >> NORMAL MODE >> DIAGNOSTIC MODE
  • B. NORMAL MODE >> DEGRADED MODE >> NORMAL MODE >> DIAGNOSTIC MODE >> DEGRADED MODE >> EMERGENCY MODE >> DIAGNOSTIC MODE
  • C. NORMAL MODE >> DIAGNOSTIC MODE >> DEGRADED MODE >> EMERGENCY MODE >> DIAGNOSTIC MODE >> NORMAL MODE >> DEGRADED MODE
  • D. NORMAL MODE >> DIAGNOSTIC MODE >> NORMAL MODE >> DIAGNOSTIC MODE >> EMERGENCY MODE >> DIAGNOSTIC MODE >> NORMAL MODE
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Suggested Answer: D 🗳️
by DALY_AY at June 10, 2025, 10:05 a.m.

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dhomy
1 week, 2 days ago
Selected Answer: D
There is NO direct arrow from DIAGNOSTIC MODE to EMERGENCY MODE. so the answer is " D " , because its invalid.
upvoted 1 times
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DALY_AY
5 months, 2 weeks ago
Selected Answer: D
its the envalid
upvoted 3 times
...
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