The correct answer is C. All the expected environments and combinations.

All the expected environments and combinations

Interoperability testing should target all the expected environments and combinations that the system will interact with in the real world.This will ensure that the system can function correctly and reliably with different hardware, software, network, and external factors that may affect its communication and compatibility with other systems1.

References=

• ISTQB Certified Tester Advanced Level Syllabus Test Analyst2, Section 3.2.2 Interoperability
• ISTQB Test Analyst Syllabus and Study Guide3, Section 3.2.2 Interoperability
• A Simple Guide to Interoperability Testing (with Examples)4, Section 2. How to do Interoperability testing

Experience-based test techniques rely on the tester’s knowledge, intuition, and creativity to design and execute tests. They are useful when there are no or poor specifications, limited time, or high-risk areas. Examples of experience-based test techniques are error guessing, exploratory testing, and checklist-based testing. References = ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst, page 67, section 4.5.2.2.

State transition testing is a technique that models the behavior of a system as a finite number of states and the transitions between them. It is suitable for testing systems that have different outcomes depending on the previous history of inputs and events. In this case, the ATM system has different states depending on whether the user has entered a valid or invalid PIN code, and how many times they have tried. 1-switch coverage is a criterion that requires testing all possible pairs of transitions from one state to another. This can help to find failures that occur when the system changes from one state to another, or when the system does not change state when it should. For example, 1-switch coverage would test the following scenarios:

• User enters a valid PIN code on the first try and requests a cash advance (valid transition from unauthenticated to authenticated state)
• User enters an invalid PIN code on the first try and then a valid PIN code on the second try and requests a cash advance (valid transition from unauthenticated to authenticated state after one invalid attempt)
• User enters an invalid PIN code on the first and second try and then a valid PIN code on the third try and requests a cash advance (valid transition from unauthenticated to authenticated state after two invalid attempts)
• User enters an invalid PIN code on the first, second, and third try and the system rejects the card (valid transition from unauthenticated to rejected state after three invalid attempts)
• User enters a valid PIN code on the first try and then requests a cash advance twice (invalid transition from authenticated to authenticated state without inserting the card again)
• User enters a valid PIN code on the first try and then removes the card and inserts it again and requests a cash advance (invalid transition from authenticated to unauthenticated state without entering the PIN code again)

References = ISTQB Advanced Level Test Analyst Syllabus 2019, section 3.2.3; How to Design Test Cases Using State Transition Testing Technique?; 0 and 1 - Switch Coverage in State Transition Testing?

In a keyword-driven test automation approach, the Test Analyst is responsible for defining the keywords that represent the actions and expected outcomes of the test cases. The keywords are then implemented by a developer or a tool as reusable functions or scripts that can be executed by the test automation framework. For example, the Test Analyst can define keywords such as “transfer”, “check balance”, “verify balance”, etc. for the account transfer user story. These keywords can then be used to design test cases in a data-driven or table-driven format, such as:

Table

Keyword

Parameter 1

Parameter 2

Parameter 3

transfer

Lars

Ann

150

check balance

Ann

-

150

verify balance

Ann

-

150

transfer

Tim

Ann

300

check balance

Ann

-

450

verify balance

Ann

-

450

References = Keyword Driven Testing Framework with Example (Section 1 and 2), What is Keyword Driven Testing: A Detailed Tutorial With Examples (Section 1 and 2), ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst (Section 4.2.1 and 4.2.2)

Testing pairs of combinations is a technique that reduces the number of test cases by testing only two factors at a time, instead of testing all possible combinations. Testing pairs of combinations is based on the assumption that most defects are caused by interactions of at most two factors. Testing pairs of combinations can be applied to this problem using the installation environments, which are the browsers, the operating systems, and the languages. By using testing pairs of combinations, the number of test cases will be lower than exhaustive testing, which would require testing every combination of factors. The formula for calculating the number of test cases for testing pairs of combinations is:

N = P * (P - 1) / 2

where N is the number of test cases, and P is the number of values for each factor. In this problem, P is 4, as there are four browsers, four operating systems, and four languages. Therefore, the number of test cases for testing pairs of combinations is:

N = 4 * (4 - 1) / 2 N = 4 * 3 / 2 N = 12 References =

• ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst1, page 2
• Pairwise Software Testing - GeeksforGeeks2, section “Introduction”
• Pairwise Testing: A Best Practice That Isn’t3, section “Pairwise Testing”

A usability review is a technique that evaluates the usability of a system or product based on a set of criteria or heuristics, without involving the actual users. It can be performed by experts or peers, and it can identify potential usability problems and suggest improvements. A usability review is suitable for situations where the availability of users is limited or impractical, and it can provide quick and low-costfeedback. References = ISTQB Certified Tester Advanced Level Syllabus Technical Test Analyst, page 81, section 5.3.2.2.

The correct answer isB.The information exchange between each system and its environment.

The information exchange between each system and its environment

The information exchange between each system and its environment refers to the compatibility and functionality of the systems with respect to the hardware, software, network, and other external factors that may affect their interaction.This type of testing is important to ensure that the systems can operate smoothly and reliably in different scenarios and conditions1.

References=

• ISTQB Certified Tester Advanced Level Syllabus Test Analyst2, Section 3.2.2 Interoperability
• ISTQB Test Analyst Syllabus and Study Guide3, Section 3.2.2 Interoperability
• A Simple Guide to Interoperability Testing (with Examples)4, Section 2. How to do Interoperability testing