[Solved] The transitions are:Green -timer-> YellowYellow -timer-> RedRed -timer-> GreenHow many unique state transitions should be tested to cover all possible state changes? | Testing Fundamentals

Testing Fundamentals - Functional Testing Techniques

A traffic light system has states: Green, Yellow, and Red. The transitions are:
Green -timer-> Yellow
Yellow -timer-> Red
Red -timer-> Green
How many unique state transitions should be tested to cover all possible state changes?

A6

B3

C9

D1

Step-by-Step Solution

Solution:

Step 1: Identify all transitions listed
There are three transitions: Green to Yellow, Yellow to Red, and Red to Green.
Step 2: Count unique transitions
Each transition is unique and must be tested once, so total is 3.
Final Answer:
3 -> Option B
Quick Check:
Number of transitions = 3 [OK]

Quick Trick: Count each unique arrow between states [OK]

Common Mistakes:

Counting transitions in both directions twice
Assuming all state pairs are transitions
Confusing states with transitions

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More Testing Fundamentals Quizzes

A traffic light system has states: Green, Yellow, and Red. The transitions are:

Step 1: Identify all transitions listed

Step 2: Count unique transitions

Final Answer:

Quick Check:

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