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What is defect testing, and how does it contribute to ensuring software quality and reliability?

Defect testing, also known as bug testing or debugging, is a crucial aspect of the software development lifecycle aimed at identifying and rectifying defects or issues in software applications. This process involves systematically testing software components, modules, or systems to uncover any deviations from expected behavior, functionality, or requirements.

Defect testing encompasses various techniques and methodologies, including manual testing, automated testing, and exploratory testing, to detect defects across different layers of the application, such as user interface, functionality, performance, and security.

By conducting defect testing, software development teams can identify and address issues early in the development process, minimizing the risk of defects propagating to later stages and reducing the cost and effort required for rectification. Moreover, defect testing helps ensure software quality and reliability by enhancing the user experience, increasing system stability, and mitigating potential risks associated with software failures or malfunctions.

Overall, defect testing plays a critical role in delivering high-quality software products that meet customer expectations, comply with requirements, and contribute to the overall success of software development projects.