ISTQB White-Box Test Design 2

Question 1

Which coverage criterion requires that every loop in the code is executed at least once with zero iterations, one iteration, and multiple iterations?

Accepted Answer

Loop coverage

Answer

Loop coverage specifically targets loop constructs by requiring execution with zero, one, and multiple iterations to reveal off-by-one and boundary errors.

Question 2

A developer has written a function with 5 independent conditions in a single compound predicate. How many test cases are needed for Modified Condition/Decision Coverage (MC/DC)?

Accepted Answer

6

Answer

MC/DC requires N+1 test cases for N independent conditions, so 5 conditions require 6 test cases.

Question 3

In control flow testing, what is a 'predicate' node?

Accepted Answer

A node where the flow splits based on a condition

Answer

A predicate node is a decision point in the control flow graph where execution can follow different paths based on a Boolean condition.

Question 4

Which white-box technique is MOST suitable for testing code that contains nested if-else structures with complex boolean expressions?

Accepted Answer

MC/DC coverage

Answer

MC/DC is specifically designed to independently test each condition within complex Boolean expressions, making it ideal for nested conditionals.

Question 5

A tester achieves 100% statement coverage on a module. What can they conclude?

Accepted Answer

Every executable statement was executed at least once

Answer

100% statement coverage only guarantees every executable statement was executed at least once; branches and paths may remain untested.

ISTQB - International Software Testing Qualifications Board Practice Test

ISTQB - International Software Testing Qualifications Board Practice Test

ISTQB White-Box Test Design 2