To answer this question, we need to understand the concept of when to stop testing. Let's go through each option to understand why it is correct or incorrect:
Option A) All the planned tests have been run - This option is incorrect because stopping testing just because all the planned tests have been run does not guarantee that all potential risks and faults have been identified. There may still be undiscovered issues that need to be addressed.
Option B) Time has run out - This option is incorrect because stopping testing just because time has run out does not ensure that all necessary testing has been conducted. It is possible that important tests were not executed due to time constraints.
Option C) All faults have been fixed correctly - This option is incorrect because fixing all identified faults does not necessarily mean that all potential risks and issues have been addressed. There may still be undiscovered faults or risks that need to be evaluated.
Option D) Both 1 and 3 - This option is incorrect because as discussed above, stopping testing just because all planned tests have been run or all faults have been fixed correctly does not guarantee that all risks and issues have been considered.
Option E) It depends on the risks for the system being tested - This option is correct because the decision to stop testing should be based on the risks associated with the system being tested. Testing should continue until an acceptable level of risk has been achieved or until the stakeholders, such as the project manager or product owner, determine that the level of risk is acceptable.
The correct answer is E) It depends on the risks for the system being tested. This option is correct because stopping testing should be based on the level of risk associated with the system.