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Match the software maintenance activities List-I to its meaning in List-II

List-I List-I
I. Corrective a. Concerning with performing activities to reduce the software complexity thereby improving program understandability and increasing software maintenability
II. Adaptive b. Concerning with fixing errors that are observed when the software is in use
III. Perfective c. Concerned with the change in the software that takes place to make the software adaptable to new environment (both hardware and software)
IV. Preventive d. Concerned with the change in the software that takes place to make the software adaptable to changing user requirement
  1. I-b, II-d, III-c, IV-a
  2. I-b, II-c, III-d, IV-a
  3. I-c, II-b, III-d, IV-a
  4. I-a, II-d, III-b, IV-c
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corrective maintenance means fixing bugs or errors.

adaptive maintenance means software adaptable both hardware and software.

perfective maintenance means software adaptable according user requirement.

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