AstraZeneca Associate Scientist II interview questions

Phone interview was very basic. A guy in HR asking questions about stuff he could have got from the CV. Only 'difficult' question was "Tell me what integrity means to you" and also "How would you set up an in vitro antibody target screen". He was from HR so told me to be slow and basic so he could understand. Face to face interview was more rigorous. Consisted of a 2 person panel who went through skills and competency based on my CV. Then questions about teamwork, any difficulties I've had to overcome with colleagues, that kind of thing. Then a one on one with the director of oncology. A tour and a final informal chat. They took their time, didn't feel rushed, seems like a nice place to work!

How did you deal with the situation when your Integrity is challenged.