amazon VO 面经

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两周前的amazon VO,senior职位,应该是某种hiring event,面试之前没有选择特定组,过了之后做team match。
注:每一轮大概会有20-30分钟的时间问BQ。

1. Design a hash system, like LRU, LFU either one should be fine. Follow up: a.what if multi-threads. b. 我用了c++,对于insert到hash map里面的key value pair没有resource check。需要RAII
2. 3 2轮coding应该非常简单,忘记具体是什么题了,如果想起来会后续更新
4. Suppose you are purchasing a specific item in amazon, design a service which show users how many times you have purchased this item, and your last purchase.
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