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iSQI Exam CTAL-TA_Syll2019 Topic 2 Question 47 Discussion

Actual exam question for iSQI's CTAL-TA_Syll2019 exam
Question #: 47
Topic #: 2
[All CTAL-TA_Syll2019 Questions]

Consider the following state diagram for a simple ATM.

The decision has been made to add the following capabilities:

Allow the customer to go from Get Balance to Deposit, Withdrawal or Menu.

Allow the customer to go from Deposit to Withdrawal, Get Balance or Menu

From Withdrawal the customer still will be able to go only to Menu.

How many test cases are required to achieve 100% 0-switch coverage of the new and existing capabilities?

Show Suggested Answer Hide Answer
Suggested Answer: C

A 0-switch test case is a test case that covers one transition from one state to another. To achieve 100% 0-switch coverage, all the transitions in the state diagram must be tested. The state diagram has seven states: Login, Menu, Logout, Withdraw, Deposit, Get Balance, and Access Account. There are 13 transitions in the state diagram, as shown by the arrows. Therefore, 13 0-switch test cases are needed.Reference=

ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst1, page 2

How to Design Test Cases Using State Transition Testing Technique?2, section ''0-switch coverage''

State Transition Testing - Tutorialspoint3, section ''State Transition Diagram''


Contribute your Thoughts:

Margurite
3 months ago
This is a real brain-teaser, but I bet I can crack it. Time to put on my thinking cap and get to work!
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Chauncey
2 months ago
I'm pretty sure it's D) 16.
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Eun
2 months ago
Hmm, I'm leaning towards B) 9.
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Shanda
2 months ago
No, I believe it's actually C) 13.
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Darrin
2 months ago
I think the answer is A) 6.
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Martin
3 months ago
Okay, let's break this down step-by-step. If I'm the customer, what are all the possible routes I could take? That should give me the answer.
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Matthew
3 months ago
Wait, is the answer 'D) 16'? I'm feeling a bit like a fortune teller here.
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Venita
3 months ago
Wow, you're like a fortune teller!
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Elli
3 months ago
Yes, the answer is indeed D) 16.
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Jeff
4 months ago
Because we need to cover all possible transitions between states to achieve 100% 0-switch coverage.
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Pearly
4 months ago
Why do you think it's 13 test cases?
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Jeff
4 months ago
I disagree, I believe the answer is C) 13.
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Pearly
4 months ago
I think the answer is A) 6.
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Lacresha
4 months ago
Ooh, 'fortune teller' - I hope my crystal ball is working today! Let's see what the cards have in store for us...
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Shelton
2 months ago
D) 16
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Izetta
2 months ago
C) 13
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Barney
3 months ago
B) 9
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Cecily
4 months ago
A) 6
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