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Consider a system with states: Locked and Unlocked. The event InsertCoin moves it from Locked to Unlocked. What is the next state after InsertCoin if the system is currently Locked?

medium📝 Predict Output Q13 of Q15

Testing Fundamentals - Functional Testing Techniques

Consider a system with states: Locked and Unlocked. The event InsertCoin moves it from Locked to Unlocked. What is the next state after InsertCoin if the system is currently Locked?

ALocked

BUnlocked

CError

DUnknown

Step-by-Step Solution

Solution:

Step 1: Identify current state and event
The system is currently in the Locked state, and the event InsertCoin occurs.
Step 2: Apply the state transition rule
According to the rule, InsertCoin moves the system from Locked to Unlocked state.
Final Answer:
Unlocked -> Option B
Quick Check:
Locked + InsertCoin = Unlocked [OK]

Quick Trick: Follow event rules from current state [OK]

Common Mistakes:

MISTAKES

Assuming state stays the same after event
Choosing error or unknown without reason
Ignoring the given transition rule

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