Software Engineering - Discussion

> Using your own words, describe the difference between verification and validation. Do both make use of test-case design methods and testing strategies?
> What is integration testing? What is a good integration test case? Who should perform integration testing?
> Describe the steps associated with user experience testing for a mobile app.
> What is the objective of security testing? Who performs this testing activity?

Need 2-3 pages with peer-reviewed citations. No introduction or conclusion needed.