UGC NET CSE | October 2020 | Part 2 | Question: 20

Question

Modifying the software by restructuring is called

• A. Adaptive maintenance
• B. Corrective maintenance
• C. Perfective maintenance
• D. Preventive maintenance

Comments

official ans was perfective maintenance which is also given in many books 

in some literature  preventive is also correct restructuring or documentation updates (often referred to as "preventive" maintenance)

https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nbsspecialpublication500-129.pdf

Answer 1

Perfective maintenance

Answer 2

Corrective, adaptive, perfective, and preventive maintenance are the four forms of maintenance.
• Corrective maintenance focuses on resolving issues that arise when the programme is in
operation.
• Adaptive maintenance is concerned with the changes made to the software in order to
make it adaptable to new environments, such as running it on a new operating system.
• The term "perfective maintenance" refers to the changes in the software that occur as a
result of adding new features.
• Preventive maintenance entails making adjustments to avoid mistakes from occurring.
The following graph shows the distribution of maintenance types by type and percentage of
time spent.
∴ Hence the correct answer is Perfective maintenance