Part 1: W0-1 Software Quality & Models

Question 1

Define “Quality” in Software.

Answer 1

Ability to fulfill requirements.

Question 2

Does testing improve quality?

Answer 2

No, testing indicates quality.

Question 3

What does a Quality Framework tree contain?

Answer 3

Quality Factors have many Quality Criteria have many Metrics.

Question 4

What is a Quality Factor?

Answer 4

High level attribute that is desirable client.

Question 5

What is a Quality Criteria?

Answer 5

Attribute of quality factor. How Software Developers view quality.

Question 6

Name 5 Quality Models.

Answer 6

1. ISO 9126 (now ISO 25010)
2. McCall’s Model
3. Boehm’s Model
4. FURPS+ Model
5. SEI’s Model

Question 7

What are the Quality Factors of the ISO 9126 model?

Answer 7

• Functionality
• Reliability
• Usability
• Efficiency
• Maintainability
• Portability

Question 8

Describe McCall’s Model?

Answer 8

Quality factors are based on:
- Product Revision
- Product Transition
- Product Operation
(Triangle of Success)

Question 9

What model is Boehm’s based on?

Answer 9

McCall’s model.

Question 10

How is FURPS+ split?

Answer 10

Into Functional and Non-functional requirements.

Question 11

What do Quality Factors depend on?

Answer 11

Application domain.

Question 12

Name 5 Quality Factors

Answer 12

1. Maintainability
2. Flexibility
3. Testability
4. Portability
5. Interoperability
6. Reusability
7. Reliability
8. Usability
9. Integrity
10. Efficiency

Question 13

Name 3 Quality Criteria and associated metrics for Reliability

Answer 13

1. Crash Frequency - Mean Time to Failure (MTTF)
2. Maturity - Software Maturity Index
3. Recoverability - system recovery time

Question 14

Name 2 Quality Criteria and associated metrics for Maintainability

Answer 14

1. Analyzability - size and complexity of logical statements, comment rate
2. Changeability - number of shared variables, architecture depth