American Express Intern interview questions

I applied online for the Technology Summer Internship in the UK and uploaded a CV, after a few days I received an email leading to an online assessment test which included not so difficult logical questions and a personality test. After a week they emailed me a link to the online interview (on HireVue) which had 6 questions. Most of them were behavioral questions (Why Amex? Explain something creative that you did, etc.), one was a basic OOP question and the last one was a quite difficult - yet familiar - dynamic programming coding challenge. The code question was really frustrating since I had not been informed in any of their emails that the online interview would include coding (they had even suggested taking the interview on a mobile phone, which would make writing code entirely impossible). I am currently waiting for the outcome of the online interview.

I Interviewed for a Software Engineering Internship position. I talked to American Express at my university's career fair then scheduled to interview with them on campus a few days later. On campus interview was very easy (Do you know java, how do you make a class...) with a few logical questions. I was next asked to visit their 'Super Day' at the Phoenix Office. The Super Day event was much more difficult than any of the previous interviews and was pretty disorganized. There was a coding challenge which required dynamic programming (which no one completed in 30 minutes), additionally there was a 1 on 1 interview where the interviewer seemed bored out of their mind (similar easy java questions to on campus interview). Lastly there was a 'Team Hackerrank' where you and a random team of a few other people (also interviewing for the intern SWE position) with a question full of typos (Index starting at 0 at one line, starting at 1 on another, impossible to tell which was correct...), very few teams even understood the problem and my team's moderator actually got extremely upset at us. And yet they gave me an offer... Weird process.