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Justification. WRONG – see the correct partitions in (d) WRONG – see the correct par..  Просмотрен 117

  1. WRONG – see the correct partitions in (d)
  2. WRONG – see the correct partitions in (d)
  3. WRONG – see the correct partitions in (d)
  4. CORRECT. The partitions follow the description in the question:

0 < employment time ≤ 2
2 < employment time < 5
5 ≤ employment time < 10
10 ≤ employment time


Question 23 K3


Which of the following statements about the benefits of deriving test cases from use cases are true and which are false?

  1. Deriving test cases from use cases is helpful for system and acceptance testing.
  2. Deriving test cases from use cases is helpful only for automated testing.
  3. Deriving test cases from use cases is helpful for component testing.
  4. Deriving test cases from use cases is helpful for integration testing.


Answer Set:

A A and D are true; B and C are false
B A is true; B, C, and D are false
C B and D are true; A and C are false
D A, C, and D are true; B is false

Justification

Sentence A is CORRECT – Use cases describe how users interact with the completed system, therefore are best fitted for defining system-level tests. Additionally, “Use cases are very useful for designing acceptance tests with customer/user participation.” (Section 4.3.5)

Sentence B is WRONG – Use cases can be executed manually, not just automatically.

Sentence C is WRONG – at the component level we derive test cases to increase code coverage. These are derived mostly by looking at the code, not by definition of a use case which will eventually exercise a certain piece of the code.

Sentence D is CORRECT – “[use cases] also help uncover integration defects caused by the interaction and interference of different components” (Section 4.3.5)

Hence

  1. CORRECT
  2. WRONG
  3. WRONG
  4. WRONG

 

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