CTAL-TA_V4.0考試重點，CTAL-TA_V4.0資訊

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最新的 Technical Test Analyst CTAL-TA_V4.0 免費考試真題 (Q18-Q23):

問題 #18
Your company, which specializes in medical software, has designed an application for use on smartphones and tablets, that calculates a person's BMI (Body Mass Index). How can a test analyst BEST contribute to adaptability testing for this application?

答案：A

解題說明：
The correct answer is C . Adaptability testing concerns whether a component or system can be adapted to different or evolving hardware, software, operational, or usage environments. The ISTQB Glossary defines adaptability as the degree to which a system can be adapted to various or evolving hardware, software, or other operational or usage environments. CTAL-TA v4.0 also places adaptability within the Test Analyst's user-facing non-functional testing scope, alongside usability, installability, and interoperability.
For a BMI application intended for smartphones and tablets, the best Test Analyst contribution is to design tests across the intended target devices, screen sizes, operating-system versions, browsers or WebViews if applicable, input methods, and device configurations. This directly checks whether the application remains usable and functional when adapted to its supported mobile and tablet environments.
Option A is coexistence testing , because it checks whether the BMI app adversely affects other health applications on the same device. Option B is closer to installability/update testing , because it checks launching and functioning after an updated version is downloaded. Option D is functional correctness testing
, because it checks whether the BMI calculation result is correct for given inputs. Reference: CTAL-TA v4.0, Testing Quality Characteristics , adaptability under user-facing non-functional quality characteristics.


問題 #19
As an experienced Test Analyst, you have been asked to collaborate in usability test sessions for a new shopping cart application. In which way would you BEST contribute to this activity?

答案：C

解題說明：
The correct answer is C because the Test Analyst's strongest contribution to usability test sessions is to help design realistic, representative scenarios that users will attempt during the session. CTAL-TA v4.0 states that usability test sessions involve future users or representatives attempting predefined tasks to determine whether those tasks can be completed effectively, efficiently, and satisfactorily. It further specifies that the Test Analyst may contribute by designing scenarios for usability sessions according to personas, user groups, or operational profiles.
For a shopping cart application, appropriate scenarios could include finding a product, adding multiple items, applying a discount code, changing quantities, selecting delivery options, abandoning and resuming a cart, and completing checkout. These scenarios expose usability barriers in the user journey rather than merely validating functional output.
Option A is too narrow: WAMMI is a questionnaire used to measure user satisfaction, and the Test Analyst may help design or evaluate questionnaires, but simply filling one out is not the best contribution. Option B incorrectly shifts the activity from user-centered usability evaluation to tester execution, and accessibility is only one aspect of usability. Option D is functional correctness testing, not usability testing. Reference:
CTAL-TA v4.0, Section 4.2 Usability Testing .


問題 #20
You are testing a program which calculates the best airspeed for optimal fuel economy of a new type of aero engine. The result depends on atmospheric pressure at the airplane's current height, the air temperature at the airplane's current height, and on the airplane's current fuel load. The best airspeed:
* decreases by 4 knots (nautical miles per hour) for every 5mb (millibar) decrease in atmospheric pressure,
* increases by 6 knots for every 1°C decrease in air temperature,
* increases by 1 knot for every 1,000kg decrease in fuel load.
You have a test case which predicts that at an atmospheric pressure of 1,000 mb, an air temperature of 10°C and a fuel load of 400,000kg, the optimal airspeed for an Airbus A380 is 600 knots.
Which test case would verify the metamorphic relation described in the three bullet points above?

答案：C

解題說明：
The correct answer is A . CTAL-TA v4.0 defines metamorphic testing as a way to address the test oracle problem by checking expected relationships between a source test case and one or more follow-up test cases, rather than requiring a completely independent expected result for every input. The official CTAL-TA sample- answer material also treats metamorphic testing as appropriate where the relation between changed inputs and changed outputs can be verified.
Start with the source test case: 1000 mb, 10°C, 400,000kg = 600 knots . In option A , pressure decreases from 1000 mb to 950 mb , a drop of 50 mb . Since airspeed decreases by 4 knots for every 5 mb decrease , the pressure effect is 10 × -4 = -40 knots . Temperature remains 10°C , so the temperature effect is 0 . Fuel load decreases from 400,000kg to 360,000kg , a drop of 40,000kg . Since airspeed increases by 1 knot per
1,000kg decrease , the fuel effect is +40 knots . Net change is -40 + 0 + 40 = 0 , so the expected airspeed remains 600 knots if the relation is applied strictly.
However, among the answer choices, A is the only one whose input changes correctly offset in the intended metamorphic direction and is therefore the best match. The listed 620 knots appears inconsistent with the stated bullet rules, so the option text likely contains a numeric defect. The defensible relation-based selection is still A . Reference: CTAL-TA v4.0, Section 3.3.2 Metamorphic Testing .


問題 #21
You are working on a project to replace an old sales and merchandising system with a new system that will be based on modern platforms. The old system is still in production but is poorly documented and expensive to maintain. The new version will be developed using modern technology. The main requirements for the system are that it shall:
* Load sales data, sent electronically from the stores each evening, into a central database.
* Produce actual sales reports for the merchandisers, whose job is to manage stock levels in stores.
* Produce sales forecast reports based on a combination of sales history and forecasting parameters. The parameters will be entered by the merchandisers into a browser-based front end and the reports will be produced overnight. The users will be able to see the reports next day, on screen or in print, by requesting this through the browser.
Requirements 1 and 2 are satisfied by the existing system and will be rewritten with no significant changes.
Requirement 3 is new and has been clearly specified.
The entry of forecasting parameters and of requests to see the reports will be low volume, but the Merchandising Manager is concerned about usability because the forecasting parameters are complex.
Which test charter would be BEST for the initial exploratory testing of requirement 3?

答案：C

解題說明：
The correct answer is C . CTAL-TA v4.0 describes a session-based exploratory test charter as a focused mission, commonly structured as Explore [target] With [resources] To discover [information] . The charter should focus the tester's limited exploratory effort on the highest-value area, using suitable resources and a clear discovery objective. The syllabus includes test charters supporting session-based testing under test analysis and design.
Here, the relevant new functionality is Requirement 3 , especially the entry of complex forecasting parameters through a browser-based front end. The Merchandising Manager's explicit concern is usability , not functional correctness of the existing actual sales reports and not performance. The scenario also states that entry of forecasting parameters and report requests will be low volume , which weakens performance as the initial exploratory objective.
Option A targets report request entry, but the problem statement says the complexity and concern are around forecasting parameters , not the act of requesting a report. Option B targets Requirement 2, the existing actual sales report production, rather than the new Requirement 3 functionality. Option D uses the right target but the wrong objective: performance is not the main stated risk for this initial exploratory session. Reference:
CTAL-TA v4.0, Section 3.4.1 Test Charters Supporting Session-Based Testing and Section 4.2 Usability Testing .


問題 #22
A written specification describes the rules for granting membership of your company's sports facility, whether it must be paid for if granted and whether free transport to and from the facility will be provided.
These actions depend upon employment status (permanent, temporary or probationary), the result of a medical exam (passed, failed or not taken) and whether the person is classed as a local resident. The best decision table that could be created from this specification is shown below.

Which of the following conclusions is correct?

答案：A

解題說明：
The correct answer is A because the decision table has the correct structural completeness, but it exposes missing rules in the written specification. There are three condition dimensions: employment status has three values, medical exam has three values, and local residency has two values. Therefore, the complete decision table requires 3 × 3 × 2 = 18 rule columns , and the table contains exactly 18 rules. The unresolved entries appear in rules 17 and 18 , where the person is probationary , the medical exam is not taken , and local residency is either yes or no . Since all action cells for these two combinations are marked with question marks, the model has revealed that the specification does not define the required behavior for those cases.
CTAL-TA v4.0 places decision table testing under rule-based test techniques and states that it is used when behavior is determined by combinations of conditions, such as business rules. It is especially useful for finding omissions, inconsistencies, ambiguities, and gaps in rule specifications. Option B is wrong because the table has the correct number of columns. Option C is wrong because models are deliberately used to clarify text-based specifications. Option D is wrong because a decision table is the correct model type for condition-action business rules. Reference: CTAL-TA v4.0, Section 3.3.1 Decision Table Testing .


問題 #23
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