ISTQB CTFL-Foundation ISTQB Certified Tester Foundation Level Exam Practice Test

Functional and structural testing can be applied at all test levels. Functional testing focuses on verifying that the software behaves as expected based on the requirements, while structural testing examines the internal structure and workings of the software. These testing approaches are complementary and can be used together at various stages of testing, including component, integration, system, and acceptance testing. Applying both types of tests ensures a comprehensive evaluation of the software's functionality and internal structure​​.

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A keyword-driven testing approach is effective because it separates the test logic (actions) from the test data. This makes the scripts more reusable and easier to maintain. By organizing tests this way, any changes in the data or the actions can be made independently without affecting the other, enhancing the efficiency and manageability of automated tests​​.

Debugging is the process that involves locating the cause of a failure and fixing the defect. Therefore, activities b) "Locating the cause of failure" and c) "Fixing the defect" are debugging activities. Identifying a failure and checking that the fix has resolved the failure are parts of testing, not debugging​​.

An incident report typically includes the version(s) of the software under test, expected results and actual results, and precise steps to reproduce the problem. However, the test execution schedule is not a standard part of an incident report. It is more relevant to test planning and management documents rather than incident reporting​​.

According to the decision table:

For TC1, since Paul is not a full member but is a Loyalty Card holder and requests 18 holes with a buggy/cart, the applicable action is £18 Green Fees plus £5 for buggy/cart, totaling £23.

For TC2, since Cheryl is not a full member, does not have a Loyalty Card, and requests 9 holes with a buggy/cart, the applicable action is £16 Green Fees with no buggy allowed​​.

Static analysis tools are designed to analyze code without executing it. They are particularly good at finding defects related to code structure, such as variables that are not used or improperly declared. These tools can parse the code and identify issues that may not be easily detected through dynamic testing methods. Other issues like omission of a major requirement (A), inadequate decision coverage (B), and component memory leakage (C) are typically found through dynamic testing or higher-level verification techniques​​ .

In the provided state table, an invalid transition is represented by an empty cell. According to the table, Event E from State S4 is an invalid transition as the cell for this combination is empty. This indicates that the transition from State S4 on Event E is not defined​​.

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An independent test function in an organization helps improve defect finding during reviews and testing by providing an unbiased perspective on the software. Independent testers are not influenced by the development team’s constraints and can evaluate the software more objectively. This leads to the identification of defects that might be overlooked by developers who are too close to their own code. Independent testing enhances the quality and reliability of the software by bringing fresh insights and ensuring thorough testing​​.

For a system with complex business rules and many branches, decision testing (a white-box technique) is appropriate because it ensures that each decision point (branch) in the code is tested. Equivalence partitioning (a black-box technique) complements this by ensuring that all functional areas (based ondifferent inputs) are adequately tested. This combination provides thorough coverage of both the internal logic and the functional requirements of the system​​.

A dynamic analysis tool would have been the most effective at detecting a defect where a code component fails to release memory after use. These tools analyze the behavior of the software while it is running, allowing them to identify issues like memory leaks, which occur when memory is not properly freed. Dynamic analysis tools can monitor the allocation and deallocation of memory in real-time, helping to pinpoint the exact location and cause of the memory leak before the software is deployed​​ .

Load testing is a type of non-functional testing used to verify that the system can handle a specified load of users performing transactions within acceptable performance parameters. In this case, load testing would ensure that up to 100 users can carry out transactions simultaneously with response times within 5 seconds. This testing helps identify performance bottlenecks and ensure that the system meets the performance requirements under expected user load conditions​​.

Equivalence partitioning is a black-box test design technique that divides input data into partitions that are expected to be treated similarly by the system. In this case, 0600 falls into the peak-time tariff, 1000 is at the boundary of peak-time but still included in it, and 1200 falls into the off-peak tariff. This ensures that each input is from a different equivalence partition, testing different functional areas of the system​​.

Common metrics used for monitoring test preparation and execution typically include quantitative measures such as the number of test cases passed and failed, the percentage of planned test cases designed, and the percentage of tasks completed in test environment preparation. These metrics provide insights into the progress and effectiveness of the testing process. However, the number of test plan review comments is not a typical metric for this purpose, as it does not directly measure the progress or quality of test execution​​.

Measurement of code coverage is important because it helps ensure that all code is exercised by tests. This does not guarantee that there are no coding errors or that all requirements are covered, but it helps identify untested parts of the code, allowing for better test coverage and more robust testing processes​​.

Testing is primarily aimed at detecting defects, verifying the functionality, and providing information to stakeholders for decision-making. While investigating defects is part of the testing process, fixing defects is not typically considered an objective of testing; it falls under the development activities. The main objectives of testing include preventing defects (through early testing activities), gaining confidence in the system, and providing valuable information to stakeholders​​.

According to the decision table, Test Case 1 is valid because an employee who is not a car or motorcycle driver cannot claim expenses, as shown in Rule 1. Test Case 3 is valid because a motorcycle driver can claim expenses, as indicated in Rule 2, with expenses claim band A. However, Test Case 2 is invalid because, according to Rule 5, a car driver with a diesel engine greater than 1600cc cannot claim expenses. The expected result should be that the expense claim is not allowed, not band C​​.

During the test planning stage, it is important to assign resources for the planned activities. This ensures that the necessary personnel, equipment, and time are allocated to execute the test plan effectively. Analyzing the test basis, designing test environments, and writing a test execution schedule are activities that come after the initial planning and resource allocation​​.

A Test Procedure Specification is a document that outlines the precise steps required to execute a test. It includes detailed instructions on the setup, execution, and teardown of the test environment, as well as the specific actions to be performed and the expected results. This document ensures that tests are conducted consistently and repeatably​​.

Maintenance testing is typically triggered by changes to the operational system, such as data migration, system modification, or system retirement. These triggers require testing to ensure that the changes do not negatively impact the existing functionality. However, the introduction of a test management tool does not directly affect the operational system and is not considered a trigger for maintenance testing​​.

The amount of testing effort is highly influenced by the predicted number of defects and the subsequent amount of rework required. If a high number of defects are expected, more effort will be needed to identify, document, and retest the defects after they are fixed. This impacts the overall testing workload significantly compared to other factors such as the ratio of developers to testers, which affects team dynamics but not the core testing effort​​.

When a developer makes a mistake that introduces a fault in the code, and this fault is not detected during testing, it becomes a latent defect. The definite consequence is that if this defect is executed under specific conditions, it may cause the system to fail. The actual failure occurs only when the defect is triggered during the system's operation. This emphasizes the importance of thorough testing to catch such defects before the software is released​​.

The testability of requirements is evaluated during the Test Analysis and Design stage of the fundamental test process. In this stage, the test team reviews the requirements to ensure they are clear, complete, and testable. The focus is on understanding the test basis and defining the test conditions, test cases, and test data necessary to verify the requirements​​.

The correct logical order for the test cases ensures a smooth and realistic flow through the system functionalities. The sequence should start with logging into the system (Test Case 3), searching for available flights (Test Case 1), selecting an available flight (Test Case 4), viewing the selected item in My Flights (Test Case 2), confirming details and booking the flight in My Flights (Test Case 6), and finally printing the confirmation receipt and exiting (Test Case 5)​​ .

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Writing test summary reports is typically the responsibility of a test leader or manager, who consolidates testing activities and results to communicate with stakeholders. Testers are more involved in preparing and acquiring test data, setting up and checking the test environment, and reviewing tests developed by others. These tasks are more hands-on and technical, aligning with the role of a tester​​ .

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The correct sequence in the causal chain is "Error, fault, failure". An error (or mistake) made by a person can lead to a fault (or defect) in the software. When the fault is executed, it may cause a failure in the software system. This sequence is important to understand the cause and effect relationship in software testing and defect management​​ .

Equivalence Partitioning is a black box test design technique used to divide input data into partitions that are expected to be treated the same by the system. It focuses on ensuring that each partition represents a set of valid or invalid states for the input, and one test case from each partition is enough to cover the entire set. This technique does not rely on the internal structure of the code but rather on the functionality and behavior as seen from the user's perspective​​.

Exploratory testing is highly effective when under severe time pressure because it allows testers to simultaneously learn, design, and execute tests. It is a flexible approach that does not require extensive preparation and documentation, making it ideal for situations where time is limited​​.

"Having to say NO" in the context of software testing typically means informing stakeholders that the software is not ready for production deployment. Testers have the responsibility to ensure that the software meets the required quality standards before it is released. Saying "no" to the release of software that does not meet these standards is crucial to prevent potential issues in the production environment. This decision is based on the identification of critical defects or incomplete functionality that could adversely affect the user experience or system performance​​.

Evaluating the testability of requirements (i) and developing and prioritizing test cases (iv) are part of the test analysis and design activities. Repeating testing activities after changes (ii), designing the test environment set-up (iii), and verifying the environment is set up correctly (v) are part of the test implementation and execution activities. These distinctions are part of the fundamental test process, which ensures that each phase of testing is appropriately planned and executed. Reference: ISTQB CTFL Syllabus V4.0, Section 1.4.1​​.

A driver is a piece of code that calls a function or module to be tested and passes it the necessary test data. It is commonly used in bottom-up integration testing to simulate the higher-level modules thatinvoke the function being tested. Stubs, on the other hand, are used to simulate lower-level modules. Reference: ISTQB CTFL Syllabus V4.0, Section 4.3.1​​.

Variance from programming standards defects (option (A)) are found during the review or static testing process. Therefore a test harness is unlikely to find a defect in programming standards.

Memory leak defects (option (C)) could potentially be found by a test harness designed to run many test cases.

Regression defects (option (D)) could be found using many types of test tool.

Defects in middleware (option (B)) are generally more likely to be found by a test harness or a dynamic analysis tool than by any other type of tool.

Iterative development models include the Rapid Application Development (RAD) model and Agile development model. The ISTQB CTFL syllabus v4.0 explains that these models involve repeated cycles of development activities, allowing for incremental improvements and adjustments based on feedback​​.

The Author is the only role that is typically used in a review.

A Champion might sponsor the review process but is not a defined role within an actual review; a Project Sponsor, if technically competent, might be asked to play a defined role within the review process, but whilst using that role they will not be a Project Sponsor; finally, a Custodian might ensure the results are stored safely but would not be involved in the actual review itself.

Logic coverage includes different forms such as Statement Coverage, Condition Coverage, and Path Coverage. Pole Coverage is not a recognized form of logic coverage in software testing. The three correct forms measure different aspects of the code's logic to ensure thorough testing. Reference: ISTQB CTFL Syllabus V4.0, Section 4.3.1​​.

Incidents, or defects, are typically raised against artifacts such as requirements, documentation, and test cases when they do not meet their expected outcomes or contain errors. However, improvements suggested by users are not considered incidents, as they are enhancements or changes that users would like to see, rather than defects in the current functionality or documentation.

Complete statement and branch coverage means that you have tested every statement and every branch in the program. Statement coverage ensures that every executable statement in the code is executed at least once, while branch coverage ensures that every possible path (true and false conditions) through the program's branches (such as IF statements) is executed. Achieving both covers a significant portion of the code, providing a thorough validation of its logic. Reference: ISTQB CTFL Syllabus V4.0, Section 4.3.2​​.

Fault masking occurs when one defect prevents the detection of another defect. In other words, an error condition hides another error condition, making it more difficult to identify and correct all defects. This can happen in various scenarios, such as when a certain path of code execution is blocked by an existing error, preventing other potential errors from being executed and detected. Reference: ISTQB CTFL Syllabus V4.0, Section 1.5.5​​.

Maintenance testing refers to the testing that is conducted on a software system that has been changed, either through corrections, enhancements, or other modifications. Its main purpose is to ensure that the changes have been implemented correctly and that the system as a whole continues to function as intended. This type of testing is crucial after a system has been released and needs to be updated or fixed. Maintenance testing ensures that the new changes do not adversely affect the existing functionality of the system​​.REREE33

Faults found by users are typically due to a combination of poor software quality and inadequate testing. Poor software quality can result from defects in the code, design, or requirements, while poor testing can fail to identify these defects before the software is released. Therefore, both factors contribute to the presence of faults in the software that users encounter​​.

(i) Executing component integration tests is usually done by developers. Developers are usually responsible for unit and component integration testing. Independent testing usually follows at system and acceptance test levels.

(ii) Static analysis is usually done by developers because: it requires an understanding of the code and therefore the person doing this needs skills in the programming language; and it can be done as soon as the code is written. Therefore it is quick and effective for the developer to do it. The risk of a lack of test independence can be mitigated by performing independent system and acceptance testing.

(iii) Setting up the test environment is an activity typically performed by a tester. It may require support from developers and staff from other departments and on some occasions environmentscould be set up by developers. However, it is a task that could be done by a tester rather than a developer.

(iv) Deciding how much testing should be automated is typically a decision made by the test leader, who will consult other staff in the decision-making process. Developers may be involved and their skills may be required to automate some tests. However, the decision on how much to automate should not be made by developers.

When testing worldwide web sites, it is crucial to focus on several key features:

A. Interaction between HTML pages to ensure that navigation and link functionalities work correctly.

B. Performance on the client side to make sure that the website loads efficiently and performs well under different conditions.

C. Security aspects to protect the website and its users from potential vulnerabilities and attacks.

These combined aspects ensure that the website provides a good user experience, performs well, and remains secure​​.

The purpose of exit criteria is to determine when to stop testing. Exit criteria are specific conditions or set of conditions agreed upon to declare that a particular test level or a test activity is completed. These criteria are used to ensure that the testing process has reached a certain level of coverage and quality before it is considered complete. Typical exit criteria include achieving a certain level of code coverage, passing a specified number of tests, or fixing a certain number of defects. Reference: ISTQB CTFL Syllabus V4.0, Section 5.1.3 .

A deviation from the specified or expected behavior that is visible to end-users is called a "failure." According to the ISTQB CTFL Syllabus, version 4.0, the terms are defined as follows:

Anerroris a human action that produces an incorrect result.

Afault(or defect) is a flaw in a component or system that can cause the system to fail to perform its required function.

Afailureoccurs when a fault is executed, leading to a deviation from the expected behavior, and this deviation becomes apparent to the end-users.

Therefore, when the deviation is visible to end-users, it is classified as a failure​​.

A disadvantage of independent testing is that developers might lose a sense of responsibility for the quality of their work. When developers rely too much on independent testers to find defects, they may become less diligent in their own testing and quality assurance efforts. The ISTQB CTFL Syllabus pointsout that while independent testing can provide an unbiased perspective and identify defects that might be missed by developers, it can also lead to potential downsides such as diminished developer accountability​​.

Code Coverage is a measure used to describe the degree to which the source code of a program is tested by a particular test suite. It helps in determining the effectiveness of testing by indicating the parts of the code that have been exercised by the tests and those that have not. It is an important metric for evaluating test coverage and identifying areas that may require additional testing. Reference: ISTQB CTFL Syllabus V4.0, Section 4.3.2​​.

One of the seven key principles of software testing, as outlined in the ISTQB Certified Tester Foundation Level Syllabus v4.0, states that exhaustive testing is impossible except for trivial cases. This principle emphasizes that it is not feasible to test all possible input/output combinations due to the sheer number of permutations, and therefore, testing should be risk-based and prioritized to ensure the most critical aspects are tested effectively.

Maintenance testing is performed on an existing operational system that has undergone planned enhancements, corrections, or other modifications. The goal is to ensure that the changes have been implemented correctly and that the system continues to function as intended. This type of testing is not typically used for defect correction during development, user acceptance testing complaints, or the integration of functions in new system development​​.

The highest level of risk is calculated by considering both the likelihood of failure and the impact value. Risk can be quantified as the product of these two factors:

A: 20% * £100,000 = £20,000

B: 10% * £150,000 = £15,000

C: 1% * £500,000 = £5,000

D: 2% * £200,000 = £4,000

Therefore, Option A (20% likelihood of failure and £100,000 impact value) represents the highest risk value. Reference: ISTQB CTFL Syllabus V4.0, Section 5.2.3 .

Exploratory testing is used when it is unclear what the system is supposed to do. Therefore test execution tools are of little use because expected results cannot be predicted.

However, the record feature of a test execution tool can be used to log the actions performed so that defects can be recreated (option (A)) and rectified more easily.

The test process can start as soon as the software requirements have been approved. The ISTQB CTFL syllabus v4.0 emphasizes that early involvement of testing helps in identifying defects early in the lifecycle, which includes the validation of requirements and planning of testing activities based on those requirements​​.

The fundamental test process consists of the following broad chronological steps:

Planning and control

Analysis and design

Implementation and execution

Evaluating exit criteria and reporting

Test closure activities

Option B correctly places three of these steps in the correct order: Analysis and design, followed by Evaluating exit criteria and reporting, and finally Test closure activities. This order reflects the logical sequence of performing detailed test analysis and design before executing tests and then evaluating the results to determine if exit criteria have been met, followed by wrapping up the testing activities.

McCabe’s Cyclomatic Complexity is a metric used to measure the complexity of a program. It is calculated using the formula:

Cyclomatic Complexity=E−N+2P\text{Cyclomatic Complexity} = E - N + 2PCyclomatic Complexity=E−N+2P

where:

E = number of edges in the flow graph

N = number of nodes in the flow graph

P = number of connected components (usually 1 for a single program)

In the given program, there are 2 decision points (IF and THEN). The cyclomatic complexity is calculated as:

Cyclomatic Complexity=2−1+2=3\text{Cyclomatic Complexity} = 2 - 1 + 2 = 3Cyclomatic Complexity=2−1+2=3

Hence, the answer is B. Reference: ISTQB CTFL Syllabus V4.0, Section 4.3.2​​.

To cover all possible sequences of statements (paths) in the given program fragment, considering two independent conditions, we have the following scenarios:

Condition 1 true, Condition 2 true

Condition 1 true, Condition 2 false

Condition 1 false, Condition 2 true

Condition 1 false, Condition 2 false

These scenarios require 4 test cases to ensure all paths are tested. Reference: ISTQB CTFL Syllabus V4.0, Section 4.3.3​​.

Structure-based testing, also known as white-box testing, uses information about the software’s internal structure to derive test cases. This method often involves measuring coverage, such as statement coverage or decision coverage, to ensure that different parts of the code are exercised by the tests. These techniques require a deep understanding of the software's construction and are used to validate the implementation rather than the functionality. Reference: ISTQB CTFL Syllabus V4.0, Section 4.3.1​​.

Typically, exit criteria may consist of various metrics that indicate whether testing has been sufficiently thorough. Estimates of defect density or reliability measures are common exit criteria used to decide if the software is ready for the next stage or release. These criteria help in assessing the quality and stability of the software based on the number and severity of defects found during testing​​.

Independent testing is crucial because independent testers can provide an unbiased perspective and verify the assumptions made during the specification and implementation phases. This helps in identifying defects that might be overlooked by developers who are closely involved in the creation of the system.

The four test levels defined for a common V-model testing approach are Component, Integration, System, and Acceptance testing. These levels align with the development stages in the V-model,where each level of testing corresponds to a specific phase in the software development lifecycle, ensuring comprehensive verification and validation of the software​​.

White box testing techniques, also known as structure-based techniques, focus on the internal structure of the software. Decision testing (C) is a white box technique that involves creating test cases to execute specific decision points in the code, such as conditional statements. This ensures that all possible paths through the code are tested, helping to identify defects related to the control flow of the application. Other techniques listed, such as use case testing and state transition testing, are black box techniques that focus on the software's functionality from the user's perspective​​.

The value of static code analysis lies in its ability to detect defects early in the development process. By analyzing the code without executing it, static analysis can identify potential issues, such as coding errors or violations of coding standards, which can be addressed before they lead to more significant problems.

Based on the given flow graph and the test cases provided:

Test Case 1 covers the path P → Q → R → U.

Test Case 2 covers the path P → Q → S → V.

Test Case 3 covers the path P → Q → S → W → X.

Test Case 4 covers the path P → Q → S → W → Y.

All decision points (P, Q, R, S, W) are covered at least once, ensuring 100% decision coverage. However, not all statements (T) are covered, as there is no test case that covers the path leading to statement T.

For a review process to be successful, several factors must be in place. According to the ISTQB syllabus, successful reviews generally have clearly defined objectives (a), involve the right people who understand the objectives of the review (c), and place an emphasis on learning and process improvement (d). These elements ensure that the review is focused, effective, and contributes to the overall improvement of the software development process​​.

Maintenance testing is essential when there is a need to ensure that the software continues to function correctly after it has been modified. Migration to a new platform is a significant change that can impact the software's functionality, requiring thorough maintenance testing to verify that the software performs as expected in the new environment. This ensures that any platform-specific issues are identified and resolved​​.

Independence in software testing refers to the separation of testing activities from the development and production processes. This separation helps ensure objectivity and reduces the risk of bias in the testing results. Independent testers are more likely to identify defects that developers might overlook due to familiarity with the code. The ISTQB syllabus highlights the importance of independence in testing as a key factor in promoting effective and unbiased testing practices​​.

An effective incident report should provide a clear and detailed description of the issue, including the title, reproducibility, a detailed description of the failure, and any relevant references to specifications. This helps in accurately identifying, reproducing, and resolving the defect. In this case, including the specific reference to the PID and a screenshot helps provide all necessary information for resolving the issue.

The configuration management process ensures that all items of testware are identified, version controlled, and tracked for changes. This process helps maintain traceability throughout the testprocess, ensuring that all test artifacts are managed systematically and changes are monitored effectively.

Testing support tools are typically used to automate activities that are resource-intensive when done manually, repetitive tasks, and repetitive inspections. However, they are not usually designed to automate activities that cannot be executed manually at all, as such activities may require complex and sophisticated human intervention or decision-making.

The highest level of independence in testing is achieved by having independent test specialists who focus on specific test types such as usability, performance, or certification testing. This independence helps in unbiased defect detection and evaluation, minimizing cognitive biases that might affect testers who are closer to the development process.

Boundary Value Analysis (BVA) involves testing at the boundaries between partitions. For the given tax calculation system, the boundaries include $4,000 (tax-free), $5,500 (next bracket start), and $33,500 (higher bracket start). Testing with $5,000 is valid because it is a boundary value between the tax-free and the 10% tax bracket.

Functional and structural tests are types of testing techniques that can be applied at various levels of testing. According to the ISTQB CTFL syllabus, functional and structural tests are not restricted to any specific test level but are applicable across all levels of testing. This includes component, integration, system, and acceptance testing. The use of both types of tests helps ensure comprehensive testing coverage, addressing both the functional requirements and the internal structure of the software product​​.

Experience-based techniques rely on the testers' knowledge, skills, and experience, as well as insights from developers and users, to design test cases. These techniques do not depend on formal models or the internal structure of the software but rather on practical experience and understanding of how the software is likely to be used and where defects are likely to be found​​.

Maintenance testing is conducted on the software after it has been delivered to address any issues or changes required due to defects, environment changes, or new requirements. The ISTQB syllabus explains that maintenance testing typically involves impact analysis to determine the extent of regression testing required, thus optimizing the testing effort and focusing on affected areas​​.

Test execution tools include tools that directly assist in the execution of tests and comparison of actual outcomes with predicted outcomes. A test harness (b) is used to execute tests by providing the necessary context and data inputs for running a test. Test comparators (d) are used to compare the actual results produced by the system under test with the expected results, which is a key part of test execution.

One limitation of static analysis tools is that they tend to generate a large number of warning messages when applied to new code. This can occur even if the code meets established coding standards, as the tools are designed to identify a wide range of potential issues, leading to a high volume of output that needs to be reviewed and addressed.

Debugging is the process where developers identify, locate, and correct defects. Testers are then responsible for confirming that the correction has resolved the original defect. This separation of responsibilities ensures that defects are properly fixed and verified.

The failure rate in testing already completed is a useful metric to monitor progress along with test preparation and execution. It provides insight into the effectiveness of the tests and the quality of the product, helping to identify areas that may require additional attention or resources.

Effective ways to improve communication and relationships between testers and other team members include communicating factual information in a constructive way (a) and trying to understand how the other person feels and why they react the way they do (b). These approaches foster a collaborative and empathetic environment, reducing friction and enhancing teamwork.

Statement coverage is a white-box testing technique that involves executing all the statements in the code at least once. It is not considered a black-box technique because it requires knowledge of the internal structure of the code being tested. Black-box techniques, such as equivalence partitioning, state transition testing, and boundary value analysis, focus on testing the functionality of the software without considering its internal code structure.

Equivalence partitioning divides input data into partitions where each partition is expected to be treated the same way by the system. The values $2,000 (no duty), $2,001 (taxed at 10%), and $10,000 (partially taxed at 12%) fall into three different equivalence classes based on the provided tax brackets, ensuring different behaviors for each class.

To ensure that the statement 'Print 'Hold'' is exercised:

X=2, Y=4, Z=3 This test case will follow the path where X ≤ Y (False), Y > Z (True), leading to the 'Print 'Hold'' statement.

Statement testing is a structure-based (white box) testing technique. It involves executing all the executable statements in the code at least once. This technique requires knowledge of the internal structure of the code, making it a white box testing method.