Description: Software Testing and Quality Assurance (QA) is a disciplined process that ensures software systems are reliable, secure, and perform as intended. It involves systematic evaluation through techniques such as functional testing, performance testing, usability testing, and security testing. QA focuses on preventing defects by improving development processes, while testing aims to detect and fix issues early. Modern practices include automation, continuous integration, and agile testing to enhance efficiency and accuracy. Effective QA improves user satisfaction, reduces maintenance costs, and ensures compliance with industry standards. Together, software testing and QA play a vital role in delivering high-quality, dependable software products.