Chapter 1 Testing Principles

Question 1

Testing Principles

Name the Seven Principles

Answer 1

1. Shows presence, not absence, of defects
2. Defects cluster together
3. Absence-of-defects fallacy
4. Early testing saves resources
5. Exhaustive testing is impossible
6. Tests wear out
7. Testing is context dependent

Question 2

Testing Principles

What do tests expose?

Answer 2

The presence of defects. (Not the absence of defects)

Question 3

Testing Principles

What is the Pareto Principle?

Answer 3

Predicted and actual defect clusters observed during testing are key input for risk-based testing

Question 4

Test Principles

What is the Absence-of-defects fallacy?

Answer 4

The misconceptions that software verification can ensure:
* The success of the system
* Business expectations will be met

Validation needs to be carried out as well.

Question 5

Testing Principles

Early testing saves time and money. Why?

Answer 5

• Defects that are removed early will not cause more defects later on.
• Failures will be reduced

(Extra Credit: Both static and dynamic testing should be used to detect defects)

Question 6

Testing Principles

Why is exhaustive testing impossible?

Answer 6

Testing everything is not possible.

Instead, utilize:
* Prioritization
* Risk-based testing

Question 7

Testing Principles

Why do tests wear out?

Answer 7

If tests are repeated too much, they lose their effectivity.

However, such tests can be used as regression tests.

Question 8

Testing Principles

What is context dependence for tests?

Answer 8

There is no universality to testing approaches

Question 9

Testing Principles

What is context dependence for tests?

Answer 9

There is no universality to testing approaches

Question 10

Testing Principles

What do tests expose?

Answer 10

The presence of defects. (Not the absence of defects)

Question 11

Testing Principles

Testing shows the absence of defects

True/False

Answer 11

False