Software Testing and Quality Assurance
$ 60
Description
Bugs caught late cost far more than bugs caught early, yet testing remains the step many development teams rush or skip entirely. This lecture note is a complete teaching resource for HND students taking SWD 423, built to the NBTE curriculum standard. It opens with the fundamentals: what testing actually is, why a single untested payment path can sink a business, and how errors, faults, defects, and failures connect. Students learn the difference between manual and automated approaches, the six principles that guide real testers, and the full range of testing types from unit and functional to acceptance and regression. The note then moves into quality assurance proper: SQA versus SQC, McCall's quality factor model, and a step-by-step walk through building a Software Quality Assurance Plan. The Software Testing Life Cycle follows across its six phases, with practical treatment of test plans, test case design, environment setup, execution, and closure reporting. Later chapters cover edge case design, requirement traceability matrices, the defect lifecycle, and the difference between severity and priority in bug reports. The automation chapters show how to choose tools, calculate break-even points, build data-driven and keyword-driven frameworks, and run continuous testing inside CI/CD pipelines. Worked examples run through grading systems, toll collection, flight booking, and a school portal, giving students the hands-on grounding to plan, execute, and automate testing in real development environments.