Capgemini Sr. Consultant interview questions

I got interviewed and cleared first round but post that HR asked me salary expectations again which she told she is trying to get approval from 2 weeks. Finally they rejected mention the experience and expectation. When they lnew this before they should not have proceeded with interview. Secondly they gave the same salary which i asked for some with less experience and there was another candidate who has same experience as this person but still the gave him less salary. Not sure how they offer 2 different salary for same years of experience people. What is this calculation can someone explain?

Scenario where data has to be loaded from lambda to S3. What policies role should have? Some python programming questions. AWS pervious experience where data was loaded in Dynamo db