ISTQB-CTAL-TA ISTQB Certified Tester Advanced Level - Test Analyst (CTAL-TACore)v3.1.2 Questions and Answers

Examining the test basis is an appropriate task for the Test Analyst during the test analysis phase, as it involves identifying and evaluating the sources of information for test analysis, such as requirements, design documents, user stories, etc. Reviewing test estimates, creating a test execution schedule, and evaluating status against exit criteria are tasks that belong to other phases of testing, such as test planning, test implementation, and test closure. Verified References:  ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA , Section 2.1.1, page 19.

Comprehensive and Detailed In-Depth Explanation:

Step 1: Identify Conditions and Rules:

Age (3 states): Below 18, Between 18-69, 70 or above

Alcohol consumption (2 states): ≤14 units, > 14 units

Employment status (2 states): Employed, Unemployed

Smoking status (2 states): Smoker, Non-smoker

Step 2: Exclude Infeasible Combinations:

No insurance for age < 18 or age ≥ 70

Valid cases are those aged between 18-69.

Step 3: Calculate Valid Combinations:

Number of valid combinations (2 × 2 × 2 = 8)

Including 2 invalid age cases (under 18, over 70), the total is 10 test cases.

Therefore, the correct answer is B (10) .

Two cases are left when this decision table is collapsed. A decision table is a technique that shows the combinations of conditions and actions for a given scenario. A decision table that is collapsed eliminates the combinations that are invalid or impossible, such as having a scholarship without meeting the qualifications. The two valid cases for this scenario are:

C1 = Y, C2 = Y, C3 = Y, A1 = Y, A2 = Y

C1 = Y, C2 = Y, C3 = N, A1 = Y, A2 = N

Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 3.3.1, page 37.

The description that is an example of the use of defect taxonomies is using a list of known defect types to penetrate the security of computer systems. A defect taxonomy is a classification of defects based on their characteristics, causes, or effects. A defect taxonomy can be used to design test cases that target specific types of defects or vulnerabilities in a system or component. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 3.8.1, page 47.

Eight 0-switch test cases are needed to achieve 100% 0-switch coverage. A state transition test technique is a technique that tests the behavior of a system or component based on its states and transitions between them. A 0-switch test case is a test case that covers one state and its associated actions and events. To achieve 100% 0-switch coverage, all states and their associated actions and events must be covered by at least one test case. The states for this scenario are:

Enter PIN

PIN OK

PIN not OK

1st try

2nd try

3rd try

Access to act

Eat card

Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 3.4.1, page 39.

Comprehensive and Detailed In-Depth Explanation:

A (Exploratory testing): Useful for investigating new areas, but not suitable for structured role-based testing.

B (Use Case testing): Correct. This technique focuses on how different user roles interact with the system, ensuring it meets their expectations and usability needs.

C (Pairwise testing): Efficient for combinations of input values, but irrelevant to role-based UI testing.

D (Boundary Value Analysis): Focuses on numeric boundaries, not applicable for role-specific usability.

Therefore, the correct answer is B (Use Case testing) .

Comprehensive and Detailed in Depth Explanation:

A. Correct because checklist-based testing relies on the experience of testers to be effective, while black-box techniques are more efficient when the test basis (like requirements) is well defined.

B. Incorrect because checklist-based testing does not necessarily focus on defects.

C. Incorrect because checklists are not limited to inexperienced testers.

D. Incorrect because black-box techniques are designed to be systematic and structured.

Therefore, the correct answer is A (The checklist-based technique is most effective when applied by experienced testers; black-box techniques are most effective applied against a well-specified test basis) .

Comprehensive and Detailed In-Depth Explanation:

Basic Behavior (1 test case) - The standard process of item return without errors.

Alternate Behaviors (2 test cases) :

Test Case 2: Incorporates E1 (Already logged in) and the normal flow.

Test Case 3: Includes E2 (Invalid login attempt), E3 (Third attempt - account frozen), and E4 (Go-Back option).

Combining compatible exceptions and following the amalgamation rule leads to 3 test cases in total.

Therefore, the correct answer is A (3) .

The finding that is true regarding this requirement is that it is unclear in terms of advance limits. The requirement states that the system shall allow cash advances of at least 200 Euros, but it does not specify what is the maximum amount or if there are any other restrictions or conditions for the cash advances. This makes the requirement ambiguous and incomplete, as it does not provide enough information for testing or implementation. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA] , Section 2.3.1, page 23.

The test type that is most likely being performed is functional completeness testing. Functional completeness testing is a test type that verifies that all the specified functional requirements have been implemented and tested. This test type is supported by traceability matrices that show the relationship between test cases and user stories, and by reporting on the coverage level of the implemented and tested user stories. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 5.1.1, page 59.

The most important information that is missing from this use case is the alternative behaviour, which describes the exceptional or error flows of events that may occur during the execution of the use case. For example, the use case should specify what happens if the user enters an invalid PIN, if the ATM runs out of cash, if the user cancels the transaction, etc. The alternative behaviour is essential to test the robustness and reliability of the system under test. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 3.6.1, page 43.

Comprehensive and Detailed in Depth Explanation:

Boundary Value Analysis (BVA) focuses on values at the edges of equivalence partitions, including just inside and just outside the boundary.

The revised boundaries are:

£500 and £749 for the new 5.5% fee band

£750 and £999 for the 4.5% fee band

Testing both valid and invalid boundaries is essential to ensure accurate fee calculations.

The correct test cases are:

£499 (just below the lower boundary)

£500 (at the lower boundary)

£749 (at the upper boundary of the first band)

£750 (at the lower boundary of the second band)

£999 (at the upper boundary of the second band)

£1000 (just above the upper boundary)

Therefore, the correct answer is D (499, 500, 749, 750, 999, 1000) .

The checklist item that would result in finding a defect for the user story is “Are the acceptance criteria defined and testable?”. The acceptance criteria are the conditions that a system or component must satisfy in order to be accepted by a user, customer, or other authorized entity. The acceptance criteria should be defined and testable for each user story, as they provide the basis for designing and executing test cases. The user story in this question does not have any acceptance criteria defined, which is a defect that needs to be addressed. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 2.4.1, page 25.

The comment that should be made about the Supercar specification is that boundaries for stock levels are ambiguous. The specification states that the site will allow an order to be processed if at least one of the chosen vehicle configurations is in stock, but it does not define what constitutes “in stock” or how many units are available for each configuration. This makes the specification unclear and inconsistent, as it does not provide enough information for testing or implementation. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 2.3.1, page 23.

Comprehensive and Detailed in Depth Explanation:

The best practice for accessibility testing is to consider accessibility from the design stage onwards . By incorporating accessibility testing early, potential issues are detected and resolved during integration, rather than waiting for the full system to be completed.

Option A is impractical as it assumes that having visually impaired people in the development team will automatically ensure accessible design.

Option B suggests a late-stage testing approach, which is less efficient.

Option D is not aligned with the primary focus on visual disabilities.

Option C is correct because addressing accessibility from the integration level onwards helps ensure that accessibility features are built into the system from the start.

Nine test cases are required to test all pairs using the pairwise testing technique based on the classification tree. Pairwise testing is a technique that tests all possible pairs of inputs for a given scenario using a mathematical algorithm to reduce the number of combinations. The inputs for this scenario are:

Power Unit: Petrol, Electric, Hybrid

Body Style: Saloon, Hatchback, SUV

Color: Red, Blue

The number of test cases is equal to the number of combinations generated by the algorithm that cover all pairs of inputs. Verified References: [ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA], Section 3.5.2, page 42.

Comprehensive and Detailed In-Depth Explanation:

To determine the answer, we first calculate the total score for each player:

Player 1: 25×2=5025 \times 2 = 5025×2=50 (Silver)

Player 2: 20×3=6020 \times 3 = 6020×3=60 (Silver)

Player 3: 30×1=3030 \times 1 = 3030×1=30 (Blue)

The output equivalence partitions based on the trophy levels are:

Blue: Total score ≤ 40

Silver: Total score > 40 and ≤ 70

Gold: Total score > 70 and ≤ 80

Diamond: Total score > 80 and ≤ 90

Platinum: Total score > 90

From the given test cases, the following partitions have been exercised:

Blue (Player 3)

Silver (Player 1 and Player 2)

Out of the 5 possible output partitions (Blue, Silver, Gold, Diamond, Platinum), only 2 partitions (Blue and Silver) have been exercised. Therefore, the percentage of partitions covered is:

A number and a percentage sign AI-generated content may be incorrect.

Hence, the correct answer is B (40%) .

The agile development model requires the earliest involvement from the Test Analyst because testing is integrated into every iteration and the Test Analyst needs to collaborate closely with the developers and the business stakeholders throughout the project. The other models have more distinct phases and testing activities are usually performed after the development activities are completed. Verified References:  ISTQB® Certified Tester Advanced Level Test Analyst CTAL-TA , Section 1.1.1, page 9.

Comprehensive and Detailed in Depth Explanation:

Project C: Since the requirements are vague and inconsistent , creating high-level test cases is more suitable. High-level test cases are flexible and allow for interpretation, which is crucial when requirements are not clearly defined.

Project D: Since the project aims for regression testing , low-level test cases are more appropriate. They are detailed and specific, essential for consistency during repeated manual or automated regression testing.

Therefore, the correct answer is D (Project C - High level test cases. Project D - Low level test cases) .

Comprehensive and Detailed In-Depth Explanation:

Component Testing (C) focuses on individual components or units and does not address usability or role-based testing.

System Testing (D) is the first level where the complete and integrated system is tested as a whole. It includes testing non-functional requirements such as usability, accessibility, and suitability for different user roles.

User Acceptance Testing (A) and Beta Acceptance Testing (B) are done later and focus on validating the product according to user needs and real-world scenarios.

Since testing for role appropriateness and usability should start as early as possible in the testing lifecycle, the correct answer is D (During system testing).

Comprehensive and Detailed In-Depth Explanation:

Conditions:

Age (3): Below 18, 18-69, 70+

Alcohol Consumption (2): ≤14 units, > 14 units

BMI (2): ≤35, > 35

Smoking (2): Yes, No

Employment (2): Full-time, Not full-time

Feasibility Check:

Age <</b> 18 and Age ≥ 70: Not covered (2 invalid cases)

BMI > 35: Not covered (1 invalid case)

Valid combinations: 3 × 2 × 2 × 2 × 2 = 96

Therefore, the correct answer is B (96).