A PIN entry component of an ATM system has been developed using the following state...

Eight 0-switch test cases are needed to achieve 100% 0-switch coverage. A state transition test technique is a technique that tests the behavior of a system or component based on its states and transitions between them. A 0-switch test case is a test case that covers one state and its associated actions and events. To achieve 100% 0-switch coverage, all states and their associated actions and events must be covered by at least one test case. The states for this scenario are:

Enter PIN

PIN OK

PIN not OK

1st try

2nd try

3rd try

Access to act

Eat card

Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 3.4.1, page 39.