Black-Box Test Design Flashcards

Which black-box technique is most appropriate when testing a field that accepts values from 1 to 100, where behavior changes only at the boundaries?

Answer: Boundary value analysis

Boundary value analysis targets the values at and just outside the limits (0, 1, 100, 101) where defects are most likely.

In equivalence partitioning, what is the minimum number of test cases typically needed to cover a valid partition?

Answer: One representative test case per partition

EP assumes all values in a partition behave identically, so one representative value per partition is sufficient.

A login system locks an account after 3 failed attempts and unlocks it after a successful admin reset. Which technique BEST models this behavior?

Answer: State transition testing

State transition testing models systems where outputs depend on current state and input, such as account locking workflows.

A decision table has 3 conditions, each with 2 possible values. How many rule columns does a full decision table have?

Answer: 8

A full decision table has 2^n columns where n is the number of binary conditions, so 2^3 = 8.

Which black-box technique focuses on the interactions between actors and the system to achieve a specific goal?

Answer: Use case testing

Use case testing derives tests from use cases that describe goal-oriented interactions between actors and the system.

When applying 2-value BVA to a numeric field accepting integers from 10 to 20, which set of test values is correct?

Answer: 9, 10, 20, 21

2-value BVA tests the boundary values themselves and the values just outside: 9 (invalid), 10 (valid min), 20 (valid max), 21 (invalid).

In a state transition diagram, what does a transition label typically consist of?

Answer: Event and optional guard condition or action

Transition labels show the triggering event, an optional guard condition (in brackets), and an optional action (after a slash).