Doordash Analytics DS final round 面经

新鲜出炉的Doordash onsite DS Analytics 面经

第一轮 marketing promotion measure/experiments 0.75hr
ramping a new feature  to help merchants grow called 'marketing program'. This feature will allow merchants to set promotions (like free delivery, discount) at certain period of time. Like 'happy hour'
1. any questions?
Q: any limitations on participants? who is paying for the discount benefit?  - no limitation - merchants are paying cost themselves
2. how to understand if merchants are interests in this?
A: ROI per usage and period of time afterwards
3. How to define ROI for merchants
A: I: promotion base on the discount format (provided with some exmaple) + commission to platform R:short term net sales and monitor sales trends for longer period of time
4. What negative impact can you think of with the feature
A: with increase of traffice, possible change of increase risk with other potential cost (delivery stress, logisitic matching issue, overall platform reliability etc); cannibalization with competitors and possible churn or switch platform for nondiscount players; unhealthy price fight if multiple merchants using it
5. how to you quantify the customer side returns
A: number of orders, retention, lift in engagement and rating
6. How to do A/B test for this - select metrics; what to split, why, why not consider a,b,c; why t-test
7. Once we've done the experiment, how to translate that to side wide impact for ramp up decisions - asked in details why I made some assumptions and how I project it, why I can hold true

第二轮 business partner 0.5hr
1. DS应该有个influence怎么体现？- make available，education，right format partnership， improve interactions with partners and d

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or free delivery over any dollar value are not carried over to future orders
4. say we want to use 1M on testing a region for free delivery for a month, how to understand ROI
- return is short-term+long-term; short-term on estimated net revenue, long term from retained customer with expected LTV/annual sales
5. As a Doordash user, what could be reason for churn?
- wait time, unstable platform, competitor advantage, change of spending pattern, credit card linkage with other app etc.
6. for wait time, how to do define and understand best wait time estimation and display format for different parties.
... a lot of follow up here ...

整体面试感觉还行 有一轮的面试官中途手机响了 之后经常分心。然后有个面试官没来。。。。 我给scheduler打电话他说她忘了通知我。。让我等了半个小时。。。
我觉得HR不太行，面试官还行

希望对大家有帮助








补充内容 (2020-6-25 09:28):
楼主 你思路确实清晰有逻辑，请问除了工作经验，有什么学习资料可以分享吗?万分感谢
- 工作经验吧 我也没找到比较好的学习资料 基本裸上的

楼主神记忆啊 过耳不忘？？？？？

楼主太厉害了，这思路那么清晰，我每次case study的时候都特别紧张，结束了之后就脑子清楚了~ 哎~

vivaroma 发表于 2021-11-1 20:50
. check 1point3acres for more.楼主，1st month retention怎么定义的？指的是每个user加入的第一个月（每人可以有不一样的start date）， ...

活捉小🐴一只

真的太强了 感谢分享

楼主太强了。。。。。加油

楼主 你思路确实清晰有逻辑，请问除了工作经验，有什么学习资料可以分享吗?万分感谢

马了看楼主回复

楼主请问有几年的工作经验？

请问楼主面的这个职位是Sr ds吗

不好意思，想问问楼主面完试多久收到消息的呢？

谢谢！请问楼主这个岗位是不是sr level的？