meta dsa 店面面经

被recruiter reach out，白女面试官体验一般，没有什么互动。求大米继续找工作。。。

.1point3acresDescription
Question description
We send out a lot of notifications to users for a variety of different purposes. For example, if your friend starts broadcasting a live video, we might send you a notification so that you can watch and engage with them. This is a “time-critical“ kind of notification. We also send feedback notifications. For example, telling you that 10 friends liked your recent post. Then we can also send things like security notifications where we ask you to change your password or something similar.
Question Statement
Question statement
Context reminder:
You can think of this question the same way as if an airline or train company wants to strike a good balance in how many and which updates it should send to their customers about flights and flight updates.
Question 1:
We only want to send ‘high quality’ notifications to our users.
What data would you look at and what metric would you propose to decide whether we are doing a good job or not?
Question 2:
The events team has created a new notification that will be sent to users whenever a friend of them is attending an event in the city they live. E.g. "Your friend is attending this event in your city. Would you like to join them?"
How would you evaluate whether this is a good change to make?
[SQL] Question 3:
Another way we evaluate the quality of our notifications is by running user surveys.
Let’s say we surveyed 100k users and asked them to rate the quality of their notifications on a scale of 1-5. The surveys table has 1 row for every time we showed a user a survey, and 1 row for every response to the survey. If a user just saw the survey but didn’t respond, they’d have one row for survey_event = ‘impression’ but the response would be NULL.

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1234    |  '2015-05-01'    |   'IN'
5678    |  '2019-03-02'    |   'US'
7891    |  '2019-08-01'    |   'IN'
A) What is the response rate to the survey?
B) Do newer users have a better opinion of notifications (rate higher) than more tenured users?
Question 4:
One of the standard notification metrics we measure is click-through rate.
Let’s say that overall CTR has dropped from 40% on June 15th to 30% on July 15th;
how would you investigate that drop?

请问lz是哪个location呀感谢分享！

lynettepan 发表于 2024-7-31 13:54
请问lz是哪个location呀感谢分享！

hr说只有bay area的，你呢