CTFL-v4 Test Analysis and Design Practice Test 2 — 15 Questions

Question 1

Refer to the exhibit. What is the minimum number of test cases required to achieve 100% decision coverage for this logic?

Accepted Answer

3. Decision coverage requires that every outcome of every decision (true and false) is exercised. Here, we have two primary 'if/else' decisions. To cover the first decision (age < 18), we need one test <18 and one test >=18. To cover the second decision (age >= 18 && age < 65), we need one test within that range and one outside. Combining these, we ensure all outcomes are reached, preventing logic errors in classification.

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2

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4

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5

Question 2

Which THREE of the following are considered 'black-box' test design techniques?

Accepted Answer

Equivalence Partitioning. Black-box techniques derive test cases from requirements, specifications, or models without referencing the internal code structure. They focus on what the system does rather than how it works. These techniques are essential for validating that the software meets user expectations and functional specifications. By using these methods, testers can effectively identify gaps between requirements and actual system behavior, ensuring that the software is fit for purpose and fulfills the business needs identified during analysis.

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Statement Coverage

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Control Flow Testing

Question 3

Refer to the exhibit. What type of test design is being facilitated by this command?

Accepted Answer

White-box structural testing.. The command indicates a focus on 'branch' coverage, which is a structural (white-box) testing metric. Branch coverage requires that every decision point in the code be executed in both its true and false directions. By generating a full report, the tester is attempting to ensure that the code's control flow is completely exercised, which is crucial for finding logic errors hidden within conditional statements that black-box testing might miss.

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Black-box functional testing.

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Exploratory testing.

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Usability testing.

Question 4

Refer to the exhibit. A software testing team is designing test cases based on a decision table derived from the provided JSON business rule policy. How should the tester handle the 'coupon_valid' condition when designing tests for 'is_member = true' and 'cart_total > 100.00' if the rule engine ignores coupons entirely under these specific criteria?

Accepted Answer

Design a single test case using a 'don't care' notation for coupon_valid since its state does not alter the outcome.. When a condition does not affect the outcome for a specific combination of other conditions, it is represented as an indifference or don't care value in decision tables. This reduces the number of redundant test cases while maintaining complete logical coverage of the active rule.

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Create two separate test cases: one where coupon_valid is true and one where coupon_valid is false.

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Omit the cart_total variable from the test design entirely because the membership status takes precedence.

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Automatically fail the test case because the JSON policy contains a conflicting boolean value for coupons.

Question 5

According to the ISTQB CTFL v4.0 syllabus, which TWO of the following statements are characteristic of black-box test techniques? (Select TWO)

Accepted Answer

Test cases can be designed before the software is implemented, supporting early test analysis and design.. Black-box test techniques, also known as specification-based techniques, derive test cases directly from requirements, models, or specifications without looking at the internal structure of the code. Testers utilize these methods to find discrepancies between expected and actual behavior, making them highly effective for validating functional completeness from an end-user perspective.

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Test cases are derived from the internal code structure, architecture, or detailed design of the software component.

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The primary measure of test thoroughness is code statement or decision coverage achieved during execution.

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Testers must have programming skills and access to the source code repository to successfully execute the technique.

Question 6

During test design for a banking application, you identify that interest rates are applied based on customer tier (Bronze, Silver, Gold) and account balance ($0-$1000, $1001-$5000, $5000+). Which technique is most effective for ensuring full coverage of these rules?

Accepted Answer

Decision table testing. Decision table testing is the most effective technique here because the system behavior is defined by complex combinations of inputs. By mapping every combination of customer tier and balance range to the resulting interest rate, you ensure all logic paths are exercised. This method prevents missing edge cases where specific business rules might overlap or conflict, which is vital for maintaining financial accuracy in banking software systems.

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Equivalence partitioning

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Boundary value analysis

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State transition testing

Question 7

Which TWO of the following factors are critical when prioritizing test cases during the test design phase?

Accepted Answer

The business risk of the associated requirements. Prioritization is essential to ensure high-risk areas are validated first within limited timeframes. By focusing on business risk and technical complexity, testers align their efforts with stakeholder expectations. This approach ensures that even if testing is truncated, the most vital application functions are verified, thereby reducing the probability of critical failures reaching the production environment and minimizing the impact of potential defects on the end-user base.

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The number of test steps in the test procedure

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The estimated time taken to write the test case

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The availability of the test automation tool

Question 8

Refer to the exhibit. You are designing boundary value tests for an age validation field. What is the minimum set of test inputs that satisfy the 3-point boundary value analysis coverage criteria?

Accepted Answer

17, 18, 19, 64, 65, 66. To achieve 3-point boundary value coverage, you must test the boundary, the value immediately above, and the value immediately below for each limit. For the min_age (18), we need 17, 18, and 19. For the max_age (65), we need 64, 65, and 66. This thorough approach ensures that the transition points of the validation logic are correctly handled, preventing common off-by-one errors in conditional logic implementation.

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18, 65

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0, 18, 65, 100

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18, 19, 65, 66

Question 9

Which activity is primary during the Test Analysis phase?

Accepted Answer

Identifying test conditions. Test analysis focuses on transforming the test basis into test conditions. It is the crucial step where testers determine 'what' to test by analyzing requirements, specifications, and architecture. By identifying these test conditions early, the team creates a clear scope, ensuring that subsequent test design and implementation are grounded in verified requirements, which reduces the likelihood of missing critical functionality during the actual testing phase.

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Creating test procedures

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Executing test scripts

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Setting up the test environment

Question 10

Which THREE of the following are considered 'test basis' documents used during Test Analysis and Design?

Accepted Answer

System requirements specifications. The test basis represents all information used to understand the software requirements and design constraints. Documents like risk analysis reports, system requirements specifications, and interface definitions are vital because they define the expected behavior of the system. Without a solid test basis, testers cannot define accurate test conditions or criteria, leading to a disconnect between the developed software and the actual business requirements, ultimately causing defects to persist into production.

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The project budget plan

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Previous test execution logs

Question 11

During Test Design, you use State Transition testing for a login module. The module has states: 'Logged Out', 'Authenticating', 'Logged In', and 'Locked'. Which aspect of this technique helps identify potential security vulnerabilities?

Accepted Answer

Validating both allowed and disallowed transitions. State transition testing is powerful for security because it tests invalid transitions, such as attempting to access 'Logged In' state directly from 'Logged Out' without passing through 'Authenticating'. By mapping all transitions, including forbidden ones, you ensure that the security model is robust. This technique helps identify missing authentication checks that might allow unauthorized users to bypass system states, which is a common vector for severe security exploits.

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Testing only the 'Happy Path' transitions

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Verifying that every state has a name

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Counting the total number of states

Question 12

Which of the following describes the 'Test Implementation' phase in the ISTQB lifecycle?

Accepted Answer

Developing test procedures and test data. Test implementation is where the test design is converted into executable test procedures. This phase includes organizing the tests into sequences, ensuring the necessary test data is prepared, and confirming the test environment is ready for execution. It bridges the gap between the high-level test conditions identified in analysis and the actual execution, ensuring that everything needed for a successful test run is documented, configured, and ready to go.

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Determining the test approach and strategy

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Analyzing the requirements for testability

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Reporting defects found during execution

Question 13

You are designing tests for a module that calculates insurance premiums based on user age and driving history. You decide to use Use Case testing. What is the main benefit of this approach?

Accepted Answer

It captures end-to-end user workflows. Use case testing focuses on user-centric workflows, ensuring that the system functions correctly from the perspective of an end-user completing a business task. It is highly effective for identifying defects in complex end-to-end interactions that might be missed by isolated functional testing. By mimicking real-world usage, you improve the quality and relevance of your test suite, ensuring the software meets the actual needs of the business and the users.

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It focuses solely on the system architecture

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It requires no knowledge of the requirements

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It is the only technique for finding syntax errors

Question 14

During Test Design, you notice that a specific function has very high cyclomatic complexity. Which black-box technique is most appropriate to help ensure sufficient coverage?

Accepted Answer

Decision table testing. When dealing with high cyclomatic complexity, white-box techniques like branch testing are often used, but black-box techniques like decision table testing are equally important to ensure the business logic represented by that complexity is correctly implemented. By using a decision table, you can systematically break down the logical paths, ensuring all combinations are covered, which helps manage the risks associated with complex, branching code that is difficult to test thoroughly.

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Error guessing

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Exploratory testing

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User story mapping

Question 15

What is the primary purpose of defining 'Expected Results' during the Test Design phase?

Accepted Answer

To provide a basis for determining pass/fail. Expected results are essential for determining whether a test case passes or fails. Without a clear, documented expectation, test execution becomes subjective and prone to error. By defining these in advance, you ensure that every member of the testing team has a consistent standard for success. This clarity is crucial for automation, reporting, and ensuring that the software behavior is validated against the actual business requirements, not just developer expectations.

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To document the steps for the test team

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To help the developers fix the code faster

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To determine the budget for the test cycle