Standard interview process - starts off with a "Tell me about yourself" and leads onto a few technical questions to back up your application.

Fairly standard and having read your application form - you got to the interview stage therefore you must have the appropriate qualifications, the interview seems more about whether you are a good fit for the team/organisation. The role will be technical but also customer facing so you must satisfy both counts.

None was that difficult that a CSA should have known already.