Amazon SDE-intern interview questions

3 questions were asked in a 45 minutes interview. There was one interviewer and another guy who was the observer. 1 Array (Easy) 2 Backtracking plus memoization (Medium) 3 Sliding Window(medium)

After submiting my cv they send me a OA it was difcult and long but after trying i passed it sucssfuly...........v................................. so now im before the intreview and i hope its going to be ok! thanks for readind