What is Software Maintenance ?

What is Software Maintenance ?
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Software maintenance is part of the software development life cycle. Its main purpose is to modify and update software applications to correct errors and improve the performance of the software. The reality of software is a model of the world. When the real world changes , the software needs to change wherever possible.
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Description : Which of the following statement(s) is/are TRUE with regard to software testing? I. Regression testing technique ensures that the software product runs correctly after the changes during maintenance. II. Equivalence partitioning is a ... (1) only I (2) only II (3) both I and II (4) neither I nor II

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