State transition testing is the most suitable test technique for this situation. State transition testing is a technique that uses scenarios based on state diagrams to test the behavior of a system or component that can change its state in response to events or inputs. A state diagram is a graphical representation of the states that a system or component can be in, the events or inputs that can trigger a change of state (transitions), and the actions or outputs that can occur as a result of a change of state. In this case, the vending machine for light drinks can be modeled as a state diagram with states such as “idle”, “coins inserted”, “drink selected”, “drink dispensed”, “change returned”, “sold out”, etc., and transitions triggered by events such as “button pressed”, “coins inserted”, “drink dispensed”, “change returned”, etc. State transition testing can help design test cases that cover all the possible states and transitions of the vending machine and verify its functionality and usability.

References:  Certified Tester Foundation Level Syllabus , Section 4.5.1

The correct answer is B, as it describes checklist-based testing.  Checklist-based testing is an experience-based test technique that involves a list of tests based on what is importa nt to the user as well as an understanding of why and how software fails 1 .  Checklist-based testing can be used to ensure that important aspects of the software are tested and to guide the tester in creating additional tests 1 .  Option A is incorrect, as checklist-based testing provides some consistency and guidelines concerning test case development by using predefined lists of items or criteria to check against 1 .  Option C is incorrect, as checklist-based testing is not restricted to non-functional testing, but can be used for both functional and non-functional testing 1 .  Option D is incorrect, as checklist-based testing does not include formal tests from det ailed lists of test conditions, but informal tests from high-level lists of items or criteria 1 . References:  1 , Section 4.2.6

Test implementation and execution is the phase of the test process where test cases are executed and test results are logged. It includes activities such as checking if the preconditions of test execution have been met, executing test cases according to a test procedure, comparing actual results with expected results, logging test results and reporting defects, and repeating test activities as needed. Prioritizing test conditions is not an activity that belongs to test implementation and execution, but rather to test analysis and design, which is the phase where test conditions are identified and test cases are designed. References:  Certified Tester Foundation Level Syllabus , Section 4.2.3 and 4.2.4

Use case testing is a technique that uses scenarios based on use cases to test the functionality and usability of a system from the user’s perspective. A use case is a description of how a system interacts with one or more actors (users or other systems) to achieve a specific goal. A typical benefit of use case testing is finding failures in the business process flows, which highlight system use in the real world. This is because use case testing focuses on how the system is used by different actors in different situations, rather than on individual components or features of the system.

References:  Certified Tester Foundation Level Syllabus , Section 4.5.2

Acceptance tests are the test types that call for involvement of an expert from the financial department for a new system that deals with all financial transactions in a company. Acceptance tests are tests conducted to determine if the requirements of a specification or contract are met by a system or software component prior to its delivery or deployment.  Acceptance tests are usually performed by end users or customers who have domain knowledge and expertise in evaluating if the system meets their needs and expectations 1  defines acceptance tests as follows:

Acceptance Testing is a level of software testing where a system is tested for acceptability. The purpose of this test is to evaluate the system’s compliance with the business requirements and assess whether it is acceptable for delivery.

Acceptance Testing is also known as User Acceptance Testing (UAT), End-User Testing, Operational Acceptance Testing (OAT) or Field (Acceptance) Testing.

Acceptance Testing is performed by end users or customers who have domain knowledge and expertise in evaluating if the system meets their needs and expectations.

A, C, and D are incorrect answers. Component testing, maintenance testing, and system testing are not test types that call for involvement of an expert from the financial department for a new system that deals with all financial transactions in a company. Component testing is testing of individual software components in isolation from other components, usually done by developers. Maintenance testing is testing of a modified system or component after changes have been made to it, usually done by testers. System testing is testing of an integrated system as a whole to verify that it meets specified requirements, usually done by testers.

Statement testing and decision testing techniques are similar because both are structure-based testing techniques. Structure-based testing techniques, also known as white-box testing or code-based testing, are based on analyzing the internal structure and logic of the software code.  Structure-based testing techniques aim to achieve a certain level of coverage of the code elements, such as statements, branches, paths, conditions, etc 1  explains structure-based testing techniques as follows:

Structure-based testing techniques (also known as white-box testing techniques or code-based testing techniques) use the information of the internal structure of the component or system to derive test cases. They are commonly used at component testing and component integration testing levels, but can also be used at system and acceptance levels.

The main advantage of structure-based testing techniques is that they can reveal defects that are not easily found by other techniques, such as logic errors, incorrect assumptions, or incomplete paths. The main disadvantage of structure-based testing techniques is that they require access to the source code, which may not be available or feasible in some situations.

Statement testing is a structure-based testing technique that aims to cover all the executable statements in the code at least once. Decision testing is a structure-based testing technique that aims to cover all the possible outcomes of each decision in the code (true and false) at least once.

A, B, and D are incorrect answers. Specification-based testing techniques, experience-based testing techniques, and black box test design techniques are not similar to statement testing and decision testing techniques. Specification-based testing techniques are based on the requirements and functionality of the software rather than its structure and logic. Experience-based testing techniques are based on the knowledge and intuition of the testers rather than any formal analysis or criteria. Black box test design techniques are based on the external behavior and output of the software rather than its internal structure and logic.

Integration testing is the process of testing the interactions between different components or subsystems of a system. It has the following characteristics:

It can be done in an incremental manner, meaning that components or subsystems are integrated and tested one by one until the whole system is integrated and tested.

It is usually done before system testing, which is the process of testing the system as a whole against its requirements and specifications.

It includes functional tests, which are tests that verify the functionality and behavior of the system or its components.

It includes non-functional tests, which are tests that verify the quality attributes of the system or its components, such as performance, reliability, security, etc.

Therefore, statements I, III, and IV are correct.

References:  Certified Tester Foundation Level Syllabus , Section 5.1.2 and 5.2.2

The attributes that best match each level of testing are as follows 1 4 :

Component testing: Stubs and drivers are often used (I), as they simulate the behavior of missing or incomplete components.

Integration testing: Testing for functional and non-functional characteristics (VI), as integration testing verifies that components interact correctly and meet their specified requirements.

System testing: The test environment should correspond to the production environment (II), as system testing evaluates the system’s compliance with its specified requirements under realistic conditions.

Acceptance testing: Testing can be based on use cases (IV), as acceptance testing validates that the system meets the user’s needs and expectations

According to the syllabus, test execution scheduling is the process of assigning and ordering test cases or test procedures to be executed in a test cycle. Test execution scheduling should take into account the prioritisation and dependency of the test cases or test procedures, as well as the availability of test resources and environments. The answer B is correct because it best meets the prioritisation and dependency conditions given in the table. The answer B follows this logic:

Start with the highest priority tests that have no dependencies, which are 5 and 7.

Then, execute the tests that depend on 5 and 7, which are 4 and 3 respectively.

Next, execute the remaining high priority tests that have no dependencies, which are 9 and 10.

After that, execute the tests that depend on 9 and 10, which are 1 and 6 respectively.

Finally, execute the low priority tests that have no dependencies, which are 8 and 2.

The other answers are incorrect because they either violate the dependency conditions or do not follow the prioritisation order. For example, answer A executes test 2 before test 10, which is not allowed because test 2 depends on test 10. Answer C executes test 6 before test 9, which is not allowed because test 6 depends on test 9. Answer D executes test 1 before test 9, which is not allowed because test 1 depends on test 9.

References: [Certified Tester Foundation Level Syllabus], Section 5.3.1, page 60-61.

Maintenance testing is a type of testing that is performed after a software product has been delivered and deployed to ensure that it still meets its requirements and functions correctly after changes have been made to it or to its environment. Changes can include corrective changes (fixing defects), adaptive changes (adapting to new platforms or environments), perfective changes (improving performance or usability), or preventive changes (avoiding potential problems). One of the appropriate reasons for maintenance testing is to verify that the software product works as expected after upgrading the operating system, which is an example of an adaptive change. Other reasons for maintenance testing can include verifying that the software product works as expected after fixing defects, adding new features, improving performance, or preventing future issues. You can find more information about maintenance testing in  Software Testing Foundations: A Study Guide for the Certified Tester Exam , Chapter 1 2 .