Discussion
Which maintenance type involves modifying software to improve performance or maintainability without changing functionality ?
Answer: C
This is perfective maintenance.
Perfective maintenance improves software that already works correctly: making it faster, easier to maintain or easier to use, and adding refinements, without being forced by a fault or a change in environment.
Corrective maintenance fixes faults found in use. Adaptive maintenance changes the software to suit a new environment, such as a new operating system or new regulations. Preventive maintenance restructures software to head off future problems; it is the near miss here, but the key follows the standard definition, which places improving performance and maintainability under perfective maintenance.
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