ISTQB Updated CTAL-TTA Exam Questions and Answers by arian

Multiple condition testing requires each possible combination of conditions to be tested, whereas modified condition/decision testing (MC/DC) requires each condition to be shown to independently affect the outcome. In the case of the ATM withdrawal, TC 3 (Customer does not have sufficient funds and credit has not been granted) would not result in the machine paying out, which is a result of applying multiple condition testing. However, for MC/DC, this test case would not be included because it doesn't provide an independent assessment of either condition's effect on the decision since both conditions are negative and the outcome is as expected (no payout).

Cyclomatic complexity is a measure of the number of linearly independent paths through a program's source code. Segment 3 has two conditions: if (a > b) or (c < d) and the associated else. This structure introduces multiple decision points, thereby increasing the number of potential execution paths. Comparatively, the other segments have fewer conditions and straightforward loops, which contribute to a lower cyclomatic complexity. Segment 3, with its compound condition and branching logic, likely has the highest cyclomatic complexity.

The requirements specify a need for ease of use, high efficiency due to high transaction rates and limited processing power, and near-continuous availability. Therefore, the three ISO 25010 major quality characteristics most relevant are:

Usability: Ensures the system is easy to learn and use.

Performance Efficiency: Ensures the system manages its processing power and transaction rates efficiently.

Reliability: Ensures the system is available and functioning correctly as close to 24x7 as possible.

API testing involves testing the application programming interfaces directly and is often a critical part of integration testing. Here are the clarifications for each option:

A. API testing cannot be applied to distributed systems: This is incorrect. API testing is commonly used in distributed systems to ensure that different components interact correctly.

B. Combinatorial testing cannot be applied to API testing: This is incorrect. Combinatorial testing techniques can be very effective in API testing to cover various parameter combinations.

C. API testing may require the use of specialized tools: This is true. API testing often involves tools like Postman, SoapUI, and others to facilitate sending requests and validating responses, which may not be feasible manually.

D. APIs are loosely coupled, so timing glitches will not happen: This is incorrect. Even though APIs are designed to be loosely coupled, timing issues can still occur, especially in asynchronous operations and in systems where timing is critical.

Therefore, the correct answer is C. API testing may require the use of specialized tools.