Amazon Software Development Engineer Intern interview questions

They attended a local career fair at my university - I handed them my resume and was asked to apply online with a certain code for SDE Interns. I applied and received a call scheduled for the next following day to interview. Interviewed, and got the email offer within 4 days.

Applied through their website in late November. Received an email from a recruiter in early February to set up two 45 minute back to back interviews. Was only given two time options on the same day (four days from receipt of the email). The interviews were almost entirely technical, consisting of questions about data structures and the Big O of their inserts, removes, indexing etc. Then a coding question where they give you a prompt and you solve it through CollabEdit. They watch everything you type, and you're supposed to talk through your logic as well. Then they ask the Big O of your solution, then they ask if you can think of any ways you can make your solution get a better Big O. One of my interviewers was somewhat rude when he asked me questions about things I hadn't learned in school yet. The other interviewer was VERY nice and friendly, but he seemed unprepared. I emailed my recruiter two weeks later thanking him and asking for an update. Received an email less than an hour later that seemed very positive, saying they were hoping to get back to me soon and asking if I could extend any other offer deadlines. Received the 'thanks-but-no-thanks' email two weeks after that (4 total weeks after my interview). I had already received and accepted a generous offer from another company by that time. The slow hiring process is ridiculous and irritating for students who are interviewing with multiple companies. I interviewed with two companies after my interview with Amazon and received offers from both before Amazon got back to me.