chapter 8

Question 1

why does software fail?

Answer 1

wrong reqs
missing reqs
impossible reqs
faulty design
faulty code
bad implementation

Question 2

what is the objective of testing?

Answer 2

discover faults and fixing them.

Question 3

what is fault identification?

Answer 3

determining what fault caused a failure.

Question 4

what is fault correction?

Answer 4

making changes to remove faults.

Question 5

Name the seven types of faults.

Answer 5

1. algorithmic fault.
2. precision fault (formula implementation is wrong)
3. documentation fault. (docs incorrectly describe prog)
4. capacity or boundary. (system performance)
5. timing or coordination faults. idk
6. performance faults. (not operating at prescribed speed.)
7. standard and procedure faults.

Question 6

What is an algorithmic fault?

Answer 6

algorithm does not produce desired results.

Question 7

page 8.

Answer 7

idk

Question 8

What are the different types of test (in order).

Answer 8

1. unit testing.
2. integration testing.
3. functional testing.
4. performance testing.
5. acceptance testing.
6. installation testing.

Question 9

What is egoless programming?

Answer 9

there is not individual tie or ownership to any program.

Question 10

Who performs the tests?

Answer 10

independent test team.

Question 11

What is closed or black-box testing?

Answer 11

assertion testing with a wide rage of inputs.

advantage: free of internal constraints.
disadvantage: cannot test all inputs.

Question 12

What is clear or white-box testing?

Answer 12

test cases that execute all statements or all control paths.

Question 13

What factors to consider when choosing tests?

Answer 13

Number of possible logical paths.
Nature of the input.
Amount of computation.
Complexity of algorithms.

Question 14

What is code walkthrough (code review)?

Answer 14

present code and documentation to review team for comments.

informal process.

Question 15

What is code inspection (code review)?

Answer 15

more formal process than code walkthrough.

Question 16

preparation and meeting times…

fault discovery rate.

Answer 16

page 18. take the L if its on the test.

page 19. sigh.

Question 17

What is test thoroughness?

Answer 17

1. statement testing
   - all statements in component are executed at least once.
2. branch testing
   each branch is tested at least once.
3. path testing
   each distinct path is tested at least once.
4. definition-use testing
   declared variable usage testing.
5. all-uses testing
   no dead paths. all defined paths are reachable.
6. all-predicate-uses
   test all uses of each variable.
7. all-computational-uses
   test all computational use of every variable.

Question 18

What are the 6 methods for integration testing?

Answer 18

1. bottom-up
2. top-down
3. big-bang
4. sandwich testing
5. modified top-down
6. modified sandwich

Question 19

what is component driver (integration testing)?

Answer 19

a routine that calls a particular component and passes a test case to it.

mocha “users create” test a particular portion of a unit.

Question 20

what is stub (integration testing)?

Answer 20

special-purpose program that simulates activities of missing components.

Question 21

what is bottom up testing (integration testing)?

Answer 21

when a system is decomposed.

test from the lowest level to the highest level.

Question 22

what is top down testing (integration testing)?

Answer 22

when a system is decomposed.

test from the highest level to the lowest level.

Question 23

what is modified top-down (integration testing)?

Answer 23

from the top.
each component is unit tested before merging.
after merging, test again.

Question 24

what is big-bang (integration testing)?

Answer 24

uses stubs and drivers to test individual components.

then everything is combined and tested again.

Question 25

what is sandwich testing (integration testing)?

Answer 25

bottom-up wannabe

Question 26

what is modified sandwich testing (integration testing)?

Answer 26

allows upper level components to be tested without merging with lower level ones.