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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: The Test Analyst Role in the Software Development Lifecycle | 15% | - Work products and stakeholder communication - Test analyst tasks across SDLC models - Contribution to test strategy and planning |
| Topic 2: Test Analysis and Test Design | 51% | - Black-box test techniques
|
| Topic 3: Evaluating Test Results and Reporting | 9% | - Improving test processes and defect detection - Analyzing test results and coverage - Reporting test progress and quality status - Assessing requirement and risk coverage |
| Topic 4: Test Analyst Tasks in Risk-Based Testing | 15% | - Regression testing scope based on change impact - Product risk analysis and assessment - Risk-based test prioritization and scope definition |
| Topic 5: Test Implementation and Execution | 10% | - Designing test procedures and test cases - Test data preparation and management - Executing tests and documenting results - Defect logging and root cause analysis support |
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問題 #16
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：B
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 #17
A simple drinks machine is described in the following state transition diagram:
How many test cases will be needed for Chow's 1-switch coverage?
答案：A
解題說明：
The correct answer is C , because Chow's 1-switch coverage requires every valid sequence of two consecutive transitions to be covered. CTAL-TA v4.0 states that N-switch coverage applies to valid sequences of N+1 consecutive transitions , and specifically defines a 1-switch as a pair of incoming and outgoing transitions at a state.
Count the possible incoming-transition/outgoing-transition pairs at each state:
* S1 has 2 incoming transitions: clear, take drink, and 2 outgoing transitions: coffee, tea.
So, 2 × 2 = 4 1-switches.
* S2 has 4 incoming transitions: coffee, tea, dispensed from sugar, dispensed from milk, and 4 outgoing transitions: clear, sugar, milk, vend.
So, 4 × 4 = 16 1-switches.
* S3 has 1 incoming transition and 1 outgoing transition: 1 × 1 = 1 .
* S4 has 1 incoming transition and 1 outgoing transition: 1 × 1 = 1 .
* S5 has 1 incoming transition and 1 outgoing transition: 1 × 1 = 1 .
Total = 4 + 16 + 1 + 1 + 1 = 23 .
Therefore, the minimum quantity needed for full Chow's 1-switch coverage is 23 . Reference: CTAL-TA v4.
0, Section 3.2.2 State Transition Testing , N-switch coverage.
問題 #18
You have been appointed to be a TA in the development of a road traffic control application, which will be installed at busy road junctions to control the operation of traffic signal lights according to sensors that detect traffic volume on the various approaches to the junction. The project is still in the early stages of test planning, but it is already clear that despite a tight schedule its safety-critical nature demands careful and thorough testing.
You have been asked to decide whether automated test design would deliver benefits. Which characteristic of automated test design is MOST important for the development of this system?
答案：B
解題說明：
The correct answer is B . In this scenario, the system is safety-critical , the schedule is tight, and the project is still in early test planning. The dominant benefit of automated test design is therefore not convenience, formatting, or later maintenance; it is early defect prevention through modeling . CTAL-TA v4.0 states that when automating test design, the Test Analyst creates a test model and automatically generates testware from that model. It lists defect prevention as a key benefit because modeling for testing is an effective way of evaluating the quality of the test basis.
For a traffic-control system, incorrect or incomplete rules for sensor inputs, signal phases, priority handling, state transitions, or timing constraints could create dangerous behavior. Creating a model early forces the team to formalize those rules and exposes omissions, contradictions, unreachable states, ambiguous transitions, and missing guard conditions before implementation defects propagate. CTAL-TA's sample-exam answer guidance also confirms that early modeling of test conditions from the testing perspective is effective quality control of the test basis and helps prevent defects in later SDLC work products.
Option A is true but secondary. Option C is operationally useful but not safety-critical. Option D is a valid benefit, but post-release maintenance is less important than preventing specification defects early. Reference:
CTAL-TA v4.0, Sections 3.5.2 and 5.2.1 .
問題 #19
The following minimized decision table shows the rules for rewarding members of a hotel's loyalty scheme who have booked a room, according to the type of room (luxury or not) and/or whether they have prepaid for breakfast (yes or no). The loyalty scheme has tiers Bronze, Silver and Gold. All combinations are feasible.
Using the checksum procedure, what do you notice about the structure of the minimized table?
答案：B
解題說明：
The correct answer is B . In CTAL-TA v4.0 decision table testing, the checksum procedure is used to detect structural problems in a minimized decision table. A rule without any "-" condition represents one full-table combination. Each "-" multiplies that rule's checksum by the number of possible values for that condition. If the minimized-table checksum is higher than the original-table checksum, some rules overlap or additional rules exist; if it is lower, the table is incomplete; if equal, the minimization may be structurally correct.
The original full table has 3 loyalty tiers × 2 luxury-room values × 2 breakfast values = 12 feasible combinations . The minimized rules score as follows: Rule 1 G/Y/- = 2 , Rule 2 G/N/- = 2 , Rule 3 S/Y/- = 2
, Rule 4 S/-/- = 4 , Rule 5 B/-/Y = 2 , Rule 6 B/-/N = 2 . Total checksum = 2 + 2 + 2 + 4 + 2 + 2 = 14 . Since
14 > 12 , the minimized table cannot be structurally clean. The overlap is visible: Rule 3 covers Silver + Luxury + either breakfast value , while Rule 4 covers Silver + any room type + any breakfast value , so the Silver/Luxury combinations are covered twice. Option C is wrong because all condition values are represented. Option D alone is weaker than B , because the actual symptom here is overlap. Reference: CTAL- TA v4.0, Section 3.3.1 Decision Table Testing .
問題 #20
In your role as a Test Analyst for the development of a business application, you asked the Product Owner to help you understand how the various product risks would affect the users.
Which product risk management activity was this?
答案：C
解題說明：
The correct answer is A . Asking the Product Owner how product risks would affect users is part of risk assessment , specifically the analysis of risk impact from a business and user perspective. In product risk management, risk identification is about discovering and listing possible product risks. Risk assessment evaluates those risks, normally by considering their likelihood and impact. Risk mitigation and risk control then use the assessed risk information to decide how testing should reduce, monitor, or respond to the risks.
CTAL-TA v4.0 assigns the Test Analyst an active role in risk-based testing, including contributing user, business, and functional knowledge to product risk analysis and using this information to guide test focus and prioritization. The answer-key structure in the official CTAL-TA sample answers maps risk-related questions to learning objectives in the Test Analyst's risk-based testing responsibilities.
The wording "how the various product risks would affect the users" is the decisive phrase. The risks have already been identified as "various product risks." The activity now is to understand their impact on users, which is assessment. Option B is wrong because no action is being taken yet to reduce the risks. Option C is wrong because the risks are not being discovered for the first time. Option D is too broad and normally includes mitigation, monitoring, and adjustment after assessment. Reference: CTAL-TA v4.0, The Tasks of the Test Analyst in Risk-Based Testing .
問題 #21
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