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Software maintenance is a critical activity in the software development life cycle, ensuring the longevity, reliability, and relevance of a software system after its initial deployment. It involves modifying and updating software applications to correct faults, improve performance, or adapt the software to a changed environment. According to IEEE, software maintenance is broadly categorized into four types: corrective, adaptive, perfective, and preventive maintenance. 1. Corrective Maintenance Corrective maintenance refers to the process of fixing defects or errors that are discovered in the software after it ____ ________ ____ __________ __________ ________ _______ _____ ___.
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