Testing Quality Characteristics

Functional completeness, correctness and appropriateness testing, and the test analyst's contribution to usability, adaptability, installability and interoperability testing.

5 minutes 5 Questions

In the ISTQB Certified Tester Advanced Level Test Analyst (CTAL-TA) syllabus, Testing Quality Characteristics covers how a Test Analyst evaluates the product against quality attributes defined by the ISO/IEC 25010 product quality model. The Test Analyst focuses on characteristics that are mostly bu…

Concepts covered
Interoperability Testing and Data ExchangeFunctional Completeness TestingDefects and Test Techniques in Interoperability TestingInstallability TestingTest Analyst Contribution to Usability Reviews and Usability Test SessionsAdaptability TestingUser Questionnaires and Accessibility Conformance LevelsFunctional Correctness TestingUsability Aspects: Interaction Capability, User Experience and AccessibilityFunctional Appropriateness Testing
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CTAL-TA - Testing Quality Characteristics Example Questions

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Question 1

A product owner of a museum ticketing website asks two things: whether blind visitors find the checkout pleasant to use, and whether the site meets the accessibility level demanded by its funding authority. Which test analyst contributions BEST address these two concerns?

Correct Answer: Help design a survey and evaluate its answers; identify the required conformance level and the target group's needs

Pleasantness for blind visitors is a user satisfaction question, best answered by surveys the test analyst helps design and evaluate. The funding requirement is a compliance question, addressed by identifying the required conformance level (for example, WCAG A, AA or AAA) and the specific needs of the target group.
Defaulting to AAA ignores the level the funding authority actually demands. Response times and code coverage concern performance and white-box testing, not accessibility compliance. Achieving a conformance level does not prove users are satisfied, and personas of sighted users exclude the target group.
Key concept: accessibility testing covers both user satisfaction, measured by surveys, and compliance with a required standard conformance level.

Question 2

A team is replacing a legacy payroll engine. For each test, the tester runs the same employee data through the old engine. The tester accepts the new engine's net pay only when both results match. Which aspect of functional correctness testing does this practice primarily address?

Correct Answer: Providing an effective test oracle for judging expected results

Running the same employee data through the legacy engine and accepting the new engine's net pay only when the results match uses the old system as a test oracle. It is a reliable source of expected results for judging whether the new calculations are functionally correct.
Traceability links requirements to tests and implemented features, but it says nothing about how expected outputs are determined. Efficient and accurate task completion by payroll staff is a usability concern, not calculation correctness. Coexistence is a compatibility characteristic about sharing an environment without adverse impact, not about comparing outputs.
Key concept: using a legacy system as a test oracle in functional correctness testing.

Question 3

A team is about to start accessibility testing of an online exam platform used by students with visual and motor impairments. Before test design begins, the test manager asks the test analyst for an input. Which input BEST matches the test analyst's contribution to this testing?

Correct Answer: The required conformance level, such as AA, and the specific needs of the student groups using assistive technology

In the ISTQB Advanced Test Analyst syllabus, the test analyst contributes to accessibility testing by identifying the required conformance level, such as WCAG AA, and the specific needs of the impaired user groups, including the assistive technologies they rely on. These inputs then drive the design of accessibility tests.
The generic checklist option is wrong because review findings are a result of testing, not an input, and a generic checklist ignores the specific user groups. Coverage targets, effort estimates and staffing are test management tasks. Rendering time limits under screen reader load are a performance concern, not accessibility conformance.
Key concept: the test analyst's contribution to accessibility testing is the conformance level plus user-specific needs.

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