ISTQB ISTQB Certifications CTFL-FOUNDATION Questions & Answers

• Question 221:

  Which of the following options BEST explain the pesticide paradox principle of testing?

  A. If we do not regularly review and revise our tests, we'll stop finding defects

  B. Repeatedly running a set of tests will ensure that a system is defect free

  C. Defects are, paradoxically, often contained in a small number of modules

  D. Testing, like spraying pesticide, is an effective bug / defect removal activity

  Correct Answer: C

• Question 222:

  Why is measurement of code coverage Important?

  A. Because 100% code coverage implies 100% coverage of requirements

  B. Because 100% code coverage guarantees that there are no coding errors

  C. Because code coverage can be used to ensure that all code is exercised by tests

  D. Because code coverage can ensure that all decisions are correctly implemented in the code

  Correct Answer: A

• Question 223:

  Which of the following options explain why it is often beneficial to have an independent test function in an organisation?

  A. To improve defect finding during reviews and testing

  B. To ensure that developers adhere to coding standards

  C. To limit communication between developers and testers

  D. To provide better metrics for the stakeholders

  Correct Answer: D

• Question 224:

  Which of the following options describe the causal chain in the correct sequence?

  A. Error, fault, failure

  B. Fault, bug, mistake

  C. Mistake, failure, fault

  D. Failure, bug, error

  Correct Answer: A

• Question 225:

  A garden irrigation system allows the user to specify 2 inputs:

  1.

  Frequency - The number of times the system should be automatically switched on per day; minimum once per day, maximum 5 times

  2.

  Duration - The duration of operation, in whole minutes, each time it is switched on; ranging from 1 to 60

  Applying 2-value boundary value analysis which of the following options has the correct test set of valid and invalid boundary values?

  A. Frequency 1, 5; Duration 1, 60

  B. Frequency 0, 1, 5, 6; Duration 59 seconds, 1 minute, 60 minutes, 60 minutes 1 second

  C. Frequency 0, 1, 5, 6; Duration 0, 1, 30, 60, 61

  D. Frequency 0, 1, 2, 5, 6; Duration 0, 1, 30, 60, 61

  Correct Answer: B

• Question 226:

  Which of the following would be a good test technique to use when under severe time pressure?

  A. Exploratory testing

  B. Structure based testing

  C. Specification based testing

  D. Use Case testing

  Correct Answer: B

• Question 227:

  A system requirement states that up to 100 users should be able to carry out a transaction, with responses returned within 5 seconds.

  What type of non-functional testing would you carry out to verify these requirements?

  A. Stress testing

  B. Maintenance testing

  C. Load testing

  D. Usability testing

  Correct Answer: A

• Question 228:

  A test case starts at S1 and triggers 4 events in sequence: E1, E4, E5, E7. What will be the finishing state and the output(s) from the test case? [K3]

  Refer to the exhibit

  

  A. S2 and O4

  B. S4 and O2

  C. S4 and O4

  D. S2 and O2

  Correct Answer: D

  Testlet 1

  MIX QUESTIONS 3

• Question 229:

  From the following list, which of the following apply to experience-based techniques? [K2]

  a.

  Test cases are derived from a model of the problem to be solved or the software

  b.

  Test cases are derived from the knowledge of the testers

  c.

  The knowledge of testers, developers and users is used to drive testing

  d.

  The internal structure of the code is used to derive test cases

  A.

  a and b.

  B.

  c and d.

  C.

  a and d.

  D.

  b and c.

  Correct Answer: D

• Question 230:

  Which of the following test case design techniques is white box (structure-based)? [K1]

  A. Use case testing

  B. State transition testing

  C. Decision testing

  D. Equivalence partitioning

  Correct Answer: C