Most Recent ISTQB CTAL-TTA Exam Questions & Answers

In a high-risk environment such as controlling aircraft hydraulics, Modified Condition/Decision Coverage (MC/DC) is crucial. This technique ensures that all conditions within a decision have been tested independently, which is vital for understanding the impact of each condition on the decision's outcome. MC/DC is often required in safety-critical systems like aerospace software to achieve a high level of confidence in the software's reliability and safety .

Modified condition/decision testing (MC/DC) provides a higher level of coverage compared to other white-box testing techniques because it requires each condition in a decision to be shown to independently affect that decision's outcome. It is more rigorous than both decision testing (which only requires each decision's possible outcomes to be tested) and statement testing (which requires only each executable statement to be executed). Therefore, for a highly critical component, MC/DC is more appropriate as it ensures a more thorough assessment of the logic in the software component.

A unit test being 'deterministic' means that whenever it is run under the same conditions, it should produce the same results. This characteristic is crucial for reliable, repeatable testing outcomes that are not influenced by external factors or previous test states .

In the provided pseudo-code for the Bingo program, the variable MIN is used in the statement MIN = MIN + A without being initialized with a value beforehand. This represents a classic 'use before define' anomaly, as the variable MIN must have an initial value before any operation like addition can be performed on it.

Stress testing is the most appropriate method for identifying weak areas in code that may cause performance issues, especially under conditions of extreme load or stress. This type of testing deliberately pushes the system beyond its normal operational capacity to see how it behaves under stress, which can help reveal vulnerabilities in error recovery and transactional integrity that are not apparent under normal conditions. Stress testing can provide early insights into potential failure points and help prioritize areas for improvement before full-scale deployment.