CTFL-v4 Test Analysis and Design — 25 Questions

Question 1

An e-commerce payment system applies a discount based on customer loyalty status (Standard, Silver, Gold) and purchase amount (Under $50, $50-$100, Over $100). How many test cases are required to achieve 100% boundary value analysis coverage using the 2-value boundary approach for the purchase amount variable?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

12 test cases derived by combining the 2-value boundaries for purchase amount with all loyalty status categories.. Boundary value analysis using the 2-value approach requires testing the minimum and maximum boundaries for each continuous partition. For the three purchase amount partitions, the boundaries are $0 (min), $50 (lower inner boundary), $100 (upper inner boundary), and the maximum realistic value. Multiplying these boundary values across the three loyalty categories ensures exhaustive numerical and categorical coverage.

Answer

6 test cases covering the minimum and maximum of each purchase amount partition.

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9 test cases by applying boundary value analysis independently of the loyalty status variable.

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18 test cases using the 3-value boundary value analysis technique for both input variables.

Question 2

An e-commerce system calculates shipping costs based on order weight: up to 5kg costs $5, over 5kg up to 20kg costs $10, and over 20kg costs $20. Applying Boundary Value Analysis (BVA) with the 2-value boundary approach, which set of test inputs represents the exact boundaries for this partition?

Accepted Answer

5.0kg, 5.1kg, 20.0kg, and 20.1kg. The 2-value boundary approach requires testing the boundary value itself and its closest neighbor on the valid side of the partition. For the partition limits of 5kg and 20kg, the relevant boundary inputs are 5.0kg, 5.1kg, 20.0kg, and 20.1kg. Applying BVA ensures defects hiding at the exact threshold limits are effectively exposed, which is crucial for financial calculation accuracy.

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0.0kg, 5.0kg, 5.1kg, 20.0kg, 20.1kg, and 50.0kg

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4.9kg, 5.0kg, 19.9kg, and 20.0kg

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4.9kg, 5.0kg, 5.1kg, 19.9kg, 20.0kg, and 20.1kg

Question 3

An e-commerce system calculates shipping fees based on order weight: up to 5kg costs $5, over 5kg up to 20kg costs $10, and over 20kg up to 50kg costs $25. Weights above 50kg are rejected. Applying Boundary Value Analysis (BVA) with a 2-value strategy, which set of input values best tests the lower and upper boundaries of the second valid partition?

Accepted Answer

5.0kg, 5.1kg, 19.9kg, 20.0kg. Applying a 2-value boundary value analysis strategy requires testing the exact boundary and the immediate neighbor inside the partition for each boundary. For the second valid partition (5 to 20kg), the lower boundary is 5kg with its neighbor 5.1kg, and the upper boundary is 20kg with its neighbor 19.9kg. This thorough testing approach effectively uncovers off-by-one coding defects at the partition limits.

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4.9kg, 5.0kg, 19.9kg, 20.0kg

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5.0kg, 5.1kg, 20.0kg, 50.0kg

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4.9kg, 5.0kg, 20.0kg, 20.1kg

Question 4

You are applying Equivalence Partitioning for a field that accepts a numeric score between 0 and 100 inclusive. Which set of values represents the best selection for partition testing?

Accepted Answer

-1, 50, 101. Selecting values from valid and invalid partitions ensures that both expected successes and error handling are verified. By picking a value from the valid range (e.g., 50) and one from each invalid range (e.g., -5 and 105), you test all logical branches of the input validation code. This strategy maximizes coverage while minimizing the number of test cases, which is essential for efficient test suite maintenance.

Answer

0, 50, 100

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0, 1, 99, 100

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-10, -5, 0, 5

Question 5

Refer to the exhibit. As a tester, what is your primary takeaway from this log during test design for future regression cycles?

Accepted Answer

The test design should include timeout and retry logic verification. The log indicates a recurring instability in the database link, which persisted despite retries. During test design, you should incorporate this finding by creating a specific test condition to handle timeout scenarios gracefully. This allows you to verify that the application handles 'Database Unavailable' states without crashing, improving the robustness of the system design and ensuring that future releases can handle intermittent connectivity issues without catastrophic failure.

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The test suite should be run in a different environment

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The payment module is ready for final release

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The retry count should be increased from 3 to 10

Question 6

Which TWO of the following are true regarding the relationship between Test Analysis/Design and Test Execution?

Accepted Answer

Design provides the traceability for execution. Test Analysis and Design activities establish the foundation for successful execution. By identifying test conditions and designing robust test procedures, the team ensures that execution is focused, efficient, and measurable. This structured approach prevents the common pitfall of 'ad-hoc' testing, where execution happens without a clear plan, leading to incomplete coverage and wasted resources. Good design is directly proportional to the effectiveness of the subsequent execution and the reliability of the overall testing results.

Answer

Test execution can begin before analysis is finished

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Execution is the only phase where test data is used

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Test scripts are always written during the execution phase

Question 7

Which approach is most appropriate when using equivalence partitioning for a field that accepts integers from 1 to 100, where 1-50 are processed by System A and 51-100 by System B?

Accepted Answer

Create partitions for 1-50 and 51-100, then test with a single value from each.. Effective test design requires identifying all distinct partitions defined by business logic. Here, the range 1-100 is split into two subsets based on processing requirements. By creating partitions for 1-50 and 51-100, along with identifying invalid boundaries outside this range, you ensure comprehensive coverage of the system's logic. This method minimizes redundant testing while maximizing the probability of uncovering defects in branch-specific code paths, which is critical for robust test analysis.

Answer

Select only the boundary values 1, 50, 51, and 100 for testing.

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Test with values 0, 1, 50, 51, 100, and 101.

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Partition the input into 1-100 and test with random values until coverage is complete.

Question 8

Refer to the exhibit. Using decision table testing to cover this policy, how many test cases are required to achieve full condition coverage?

Accepted Answer

Four test cases.. Decision table testing is an excellent technique to ensure all combinations of input conditions are evaluated. With two boolean-like conditions (age >= 18 and verified status), there are four possible logical outcomes (2^2). Providing test cases for all combinations (True/True, True/False, False/True, False/False) ensures that the system's policy logic is fully verified, reducing the risk of hidden defects in the conditional access evaluation code.

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Two test cases.

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Three test cases.

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One test case.

Question 9

Refer to the exhibit. Which boundary value analysis test case would be most logical to run next to ensure the system handles the upper boundary correctly?

Accepted Answer

100.. Boundary value analysis focuses on the transition points between valid and invalid partitions. Given that 105 results in an error and 99 is valid, the threshold is clearly somewhere near 100. Testing 100 is crucial because it is the boundary value. By verifying the behavior at exactly 100, we confirm whether the system's logic handles the inclusive or exclusive limit, which is a common source of programming errors.

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101.

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98.

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106.

Question 10

Which of the following scenarios is the most appropriate application of exploratory testing during test design?

Accepted Answer

When the project timeline is very tight and formal documentation is minimal.. Exploratory testing is a powerful, experience-based approach that complements formal test design. It is most effective when requirements are missing, the system is highly dynamic, or when testers need to quickly investigate complex, poorly documented areas. By allowing the tester to learn about the system while designing and executing tests simultaneously, it provides rapid feedback and uncovers critical issues that structured, predefined tests might overlook due to their rigid scope.

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When testing a highly regulated medical device with strict audit requirements.

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When ensuring 100% statement coverage for a stable legacy module.

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When replacing all formal black-box test design techniques.

Question 11

An e-commerce application calculates shipping costs based on order weight: up to 5 kg costs $5, over 5 kg up to 20 kg costs $15, and over 20 kg costs $30. Using Boundary Value Analysis with the 2-value boundary approach, which set of test values specifically targets the internal boundaries of this specification?

Accepted Answer

5, 6, 20, 21. The 2-value boundary approach tests the boundary values themselves. For the boundaries at 5 and 20, the exact points to test are 5, 6, 20, and 21, capturing the precise transition points of the weight categories. Applying Boundary Value Analysis correctly helps uncover off-by-one errors in conditional statements, which frequently cause miscalculations in production environments.

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0, 5, 10, 20, 25

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4, 5, 19, 20

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4, 5, 6, 19, 20, 21

Question 12

An e-commerce system processes loyalty discounts based on membership tier: Bronze (0%), Silver (5%), Gold (10%), and Platinum (15%), alongside purchase amounts. Which black-box test technique is most appropriate to derive test cases for the valid and invalid membership discount inputs?

Accepted Answer

Equivalence partitioning. Equivalence partitioning divides input data into valid and invalid partitions to reduce test cases while maintaining high defect detection coverage. Applying this ensures all distinct business rules for membership tiers are thoroughly verified without redundant testing of identical behaviors. This technique is fundamental for boundary and partitioning analysis in structured test design.

Answer

Boundary value analysis

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State transition testing

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Decision table testing

Question 13

During test design for a banking application, you identify that interest rates change based on account balance tiers. You decide to use boundary value analysis to test these tiers. Which set of values best represents the boundary testing for a tier defined as 1,000 to 5,000 inclusive?

Accepted Answer

999, 1000, 5000, 5001. Boundary value analysis focuses on the edges of equivalence partitions where defects are most likely. By testing the boundaries (999, 1000) for the lower limit and (5000, 5001) for the upper limit, you ensure that the transition points between tiers are handled correctly by the logic. This is critical because errors frequently occur at the transition points between defined business rules, making this technique essential for functional validation.

Answer

1000, 2500, 5000

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0, 1000, 5000, 10000

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999, 2500, 5001

Question 14

Refer to the exhibit. Which decision table configuration provides the most comprehensive test coverage for this policy?

Accepted Answer

Test cases for Admin, User (in-hours), and User (out-of-hours).. Decision tables are excellent for testing complex business logic. By mapping all combinations of inputs (role, time, access), we ensure that each outcome is correctly implemented. A comprehensive table includes all valid combinations and handles edge cases, such as 'User' role outside of office hours. This systematic approach ensures that no logical path is overlooked, preventing security flaws where users might access restricted areas due to missing or overlapping logical conditions.

Answer

Test cases for Admin and User only.

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Test cases for all roles at 10:00, 12:00, and 14:00.

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Test cases for Admin at all hours.

Question 15

During state transition testing for an ATM, you identify three states: 'Idle', 'Card Inserted', and 'PIN Verified'. If a user enters an incorrect PIN three times, the system transitions from 'PIN Verified' to 'Card Ejected'. What is the primary purpose of identifying the 'Card Ejected' state in your design?

Accepted Answer

To validate the transition logic triggered by a specific event sequence.. State transition testing is vital for systems that exhibit different behaviors based on previous events. Identifying the 'Card Ejected' state ensures that security protocols are followed correctly under failure conditions. Testing these transitions confirms the system returns to a safe state, preventing unauthorized access. This is crucial for systems where history-dependent behavior dictates the outcome of future user actions, as errors in state management can lead to critical security vulnerabilities.

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To verify that the system can handle concurrent users.

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To ensure that invalid states are unreachable.

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To test the performance of the ATM hardware.

Question 16

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.

Answer

2

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4

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5

Question 17

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.

Answer

Statement Coverage

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Control Flow Testing

Question 18

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 19

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.

Answer

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 20

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.