Facebook Data Engineer Technical

3 python2 sql


1. Replace the none values ​​​​​​in a list with the previous non none value.
input-[5, 2, None, None, 3] output-[5, 2, 2, 2, 3]


2. Count character occurrence in the given string


3. Find the

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campaign.From the % of sales that had a valid promotion, what % of transactions occur on either the very first day or the very last day of a promotion campaign.

not too bad

请问是这周刚面的吗？谢谢加米啦

同问，请问是刚刚面试完的吗？也加米啦，谢谢楼主分享！