ISTQB Black-Box Test Design 3

Question 1

A tester applies cause-effect graphing to a module and then derives test cases from it. What intermediate artifact is typically produced?

Accepted Answer

A decision table

Answer

Cause-effect graphing converts the logic of causes and effects into a decision table, from which test cases are derived.

Question 2

Which coverage criterion ensures that every valid and invalid equivalence class is exercised at least once?

Accepted Answer

Equivalence partition coverage

Answer

Equivalence partition coverage requires at least one test for each identified valid and invalid partition.

Question 3

A shopping cart applies a 10% discount when the order total is between $50 and $99, and a 20% discount for $100 or more. Using EP, how many valid partitions exist for the discount logic?

Accepted Answer

3

Answer

Three valid partitions exist: below $50 (no discount), $50–$99 (10%), and $100+ (20%).

Question 4

In state transition testing, which coverage level requires that every valid transition be exercised at least once?

Accepted Answer

0-switch coverage

Answer

0-switch (transition) coverage requires executing every individual valid state transition at least once.

Question 5

A form field accepts months of the year as integers. Which value would be in an INVALID equivalence class?

Accepted Answer

13

Answer

Valid months are 1–12; the value 13 falls outside this range and belongs to an invalid equivalence class.

ISTQB - International Software Testing Qualifications Board Practice Test

ISTQB - International Software Testing Qualifications Board Practice Test

ISTQB Black-Box Test Design 3