Slides 21 - Data Flow based Testing

Question 1

Data flow testing

Answer 1

Data flow testing is a family of test coverage criteria to select paths through the program’s control flow in order to explore sequences of events related to the status of variables or data objects.

Data flow testing is testing technique in which test cases are designed to execute definition-use pairs of variables

Question 2

Data Flow Test Coverages

Answer 2

● all-p-uses

● all-c-uses

● all-c-some-p-uses

● all-p-some-c-uses

Question 3

Software Examinations

Answer 3

● Define implicit quality criteria

● Define conditions development artifacts should fulfill

● Show collective and individual weaknesses of the examinees

● Determine extremely good and bad examinees

Question 4

Review

Answer 4

A review is the examination of an examinee
● against requirements and guidelines
● with the objective of identifying defects but also to highlight positive aspects

Question 5

Roles during Review

Answer 5

● Moderator

● Author

● Minute taker

● Reviewer

● Review Team

● Manager

Question 6

What should be examined?

Answer 6

Artifacts, created for customer or user.
● requirements, acceptance tests, manuals

Artifacts, defining important interfaces
● system design, component interface

Risky artifacts
● done the first time (new technology, method)
● produced by a new colleague

Question 7

Investment – Rule of thumb

Answer 7

● 5 reviewers for documents

● 3 reviewers for code

Question 8

Advantages Review

Answer 8

● The procedure retains the advantages of technical reviews because the author compensates the missing (or little) preparation of the reviewers
● During the preparation, the author discovers many mistakes

Question 9

Drawback Review

Answer 9

● There is no clear separation of responsibilities (planning, release).
● The revision is not examined again.
● The preparation time is “stolen”.
● The efficiency is lower.

Question 10

Advantage reviews than tests

Answer 10

● Mistakes are found directly
● Only the effect of the defect is noticeable in a test
● The defect has to be discovered by debugging