Amazon SDE-intern interview questions

It was a one hour interview . First question was based on double heap which was hard and next was design a data structure - medium . The interviewer was helpuful

Apply online without referral, after 3 month got into the first round of OA, which was 4 easy to medium leetcode problems. One month later got into the second round: VO, which was around 45 minutes to 1 hour. A few days later got the result of waitlisted.