Software Testing Quality Control & Assurance 5

Question 1

Which principle states that testing can reveal the presence of defects but cannot prove their absence?

Accepted Answer

Testing shows the presence, not absence, of defects

Answer

This fundamental testing principle, articulated by Dijkstra, means that even a comprehensive test suite passing does not guarantee the software is defect-free.

Question 2

A QA team discovers that running the same set of regression tests over many cycles no longer finds new defects. This phenomenon is called:

Accepted Answer

The pesticide paradox

Answer

The pesticide paradox describes how repeatedly running the same tests eventually stops finding new bugs because the software adapts and test cases become ineffective over time.

Question 3

In an Agile QA context, what is the primary purpose of a Definition of Done (DoD)?

Accepted Answer

To establish shared quality criteria that must be met before a feature is considered complete

Answer

The Definition of Done establishes agreed-upon quality criteria (tests passed, code reviewed, documented, etc.) that must be satisfied before work is considered complete.

Question 4

Which type of non-functional testing evaluates how a system behaves under varying user loads to identify the maximum operational capacity?

Accepted Answer

Load testing

Answer

Load testing gradually increases user load to determine the system's capacity and performance at expected and peak traffic levels.

Question 5

A quality audit reveals that developers are skipping unit tests to meet sprint deadlines. The QA manager's BEST response is to:

Accepted Answer

Recommend adding unit testing to the Definition of Done and escalate to management

Answer

Embedding unit testing in the Definition of Done makes it a non-negotiable quality gate, and escalating ensures management enforces the standard consistently.

Software Testing Practice Test

Software Testing Practice Test

Software Testing Quality Control & Assurance 5