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Complete coverage requires exercising all relevant combinations of the decision conditions in the code. The decision contains two conditions: whether X is less than Y and whether Z equals 3. The four test cases represent the possible true and false combinations of those conditions: true/true, true/false, false/true, and false/false. Line coverage would require only that executable statements be run at least once, so fewer tests would be needed. Branch coverage would require the decision to evaluate both true and false, also requiring fewer tests. Basic condition coverage only requires each condition to be true and false at least once. Since all four combinations must be executed, the coverage type is complete coverage.

The analyst is responsible for working through business scenarios to determine whether the defined requirements are complete, consistent, understandable, and aligned with stakeholder needs. In requirements engineering, analysts elicit, document, analyze, and validate requirements by examining user workflows, business rules, use cases, scenarios, and expected outcomes. Walking through scenarios helps reveal missing requirements, unclear assumptions, exception paths, interface needs, and conflicting stakeholder expectations. Testers may later use scenarios to design validation tests, and quality representatives may help verify requirement quality. Product developers may review feasibility and design implications. However, the primary responsibility for confirming requirement completeness through business scenario analysis belongs to the analyst because that role owns requirements analysis and stakeholder interpretation.

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Dead code is code that cannot be executed or is never reached during program execution. White-box testing is used to identify dead code because it examines the internal structure, logic, paths, branches, and statements of the software. Techniques such as code coverage analysis, control-flow analysis, and path testing can reveal statements or branches that are not exercised. Black-box testing focuses on external behavior and requirements without examining internal code structure, so it may not detect unreachable code. Simulation may be useful in certain testing environments, but it is not the primary method for finding dead code. Regression testing checks whether changes have introduced unintended effects. Therefore, white-box testing is the correct method.

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 PDCA Cycle Overview: The Plan-Do-Check-Act (PDCA) cycle is a continuous improvement process used to align processes with quality standards.

 Act Phase: In the ' Act ' step, the organization acts on the findings from the ' Check ' step to implement changes that improve the process. This typically involves making revisions to the quality system.

 Quality Improvements: By making revisions based on the findings from audits and performance evaluations, the organization continuously improves its processes and aligns them better with international standards.