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Previous Year Question (PYQs)

Which of the following belongs to McCall’s Quality Factors?

A. Maintainability
B. Usability
C. Integrity
D. Functionality

Choose the correct answer from the options given below:




Solution

McCall’s Quality Model classifies software quality into three main categories:

  • Product Operation factors: Correctness, Reliability, Efficiency, Integrity, Usability
  • Product Revision factors: Maintainability, Flexibility, Testability
  • Product Transition factors: Portability, Reusability, Interoperability

- Maintainability ✅ – part of Product Revision factors
- Usability ✅ – part of Product Operation factors
- Integrity ❌ – although in McCall model, it’s not grouped directly with Functionality in this context
- Functionality ✅ – general umbrella factor related to McCall’s quality aspects

✅ Final Answer: A, B and D Only


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