Software testing is an investigation conducted to provide stakeholders with information about the quality of the product or service under test Software testing can also provide an objective, independent view of the software to allow the business to appreciate and understand the risks of software implementation. Test techniques include, but are not limited to, the process of executing a program or application with the intent of finding software bugs (errors or other defects).
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https://vskills.in/certification/tutorial/software-testing/introduction-overview/