Quality Assurance (QA) is a measure taken to implement defect-free applications. Software testing helps to finalize the application or product for the needs of business and users. It is important to have good test coverage to test the software application fully, and to ensure it performs well and in accordance with the specifications.

Software Quality Analysis (SQA) consists of methodologies and techniques for evaluating the processes and methods, tools and technologies used to ensure the quality of the software developed. SQA is typically achieved by using well-defined standards, including tools and processes, for quality control to ensure software integrity and reliability.

Black box testing is done without knowing about the internal structure of the code and is done for the higher level of testing like User acceptance testing or System testing. But In White box testing the internal structure of the code is known to the tester who will test the software, testing is done in a lower level of testing like Unit testing or integration testing.

Functional testing confirms whether an application works according to its design or not. Feature testing determines whether a specific feature works as intended when this aspect of the software is integrated with the application completed. Non-functional testing is performed to prove the non-functional requirement, i.e., Usability, Performance, etc. It mainly confirms if the system’s behavior is as per the requirement or not. Regression Testing helps a developer confirm that a recent (program or code) change has not affected existing features to an extent.

The primary purpose of unit testing is to validate that every single unit of the software works perfectly as designed. Integration testing is used to test individual software components or code units to verify interactions and detect interface defects between different software components. Integration testing has different testing strategies such as big-bang integration, top-down integration, bottom-up integration, and hybrid integration.

Testing enables developers to deliver software that prevents unexpected results, meets expectations, and improves application maintenance over the long term. Thus, software testing is structured to provide consumers with the best possible product with more efficient features.

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