Tips

It’s okay to make mistakes.

Quality is more important than quantity.

Interact with the interviewer

Always clarify questions

Ask time to structure your communication

先讲框架和总结，然后再去讲细节，这样能让面试官跟上。

Red flag

You have no idea at all

一听题没思路不要紧，可以向面试官clarify question，从而得到一些hint。

You have to many ideas

Depth is better than Breadth.

If you do have many ideas, you can say:

Following Frameworks Blindly

questions are specific, and frameworks are generic.

Not able to defend your self

……

Facebook Metric Interview Question and Answer

how to improve a product?

1 Clarify the question

• Be clear about the goal.
• Narrow down to a specific product or feature.

2 Identify product improvement opportunities

Brainstorm

2-1 Idea 1: Analyze user journey map

• When you land on a website, what would you do as a user. Then think about how we can reduce or remove the friction in current user experience.

EG. Increasing the number of “what’s on your mind” postings.

Pre-generate the content to simplify the process of posting.

This outcome is what we want.

Don’t worry that some idea are too simple or not practical.

2-2 Idea 2: Segment users into groups

• Segment users into groups based on their behavior and then analyze what makes users more active than others, how can we incentivize inactive users to be more active on the platform.

• Not get enough attention such as likes and comments therefore they don’t have much motivation to post anymore.
• Some unexpected criticism on their posts which make them feel it’s a toxic platform.
  

Send some post that’s more controversial and encourage them share their opinions.

No need to provide all of them. We can only focus on one of them.

Product manager:

• Reducing friction
• Don’t mention ML

Data Scientist:

• Analyze user behavior
• Turn inactive users to active users

3 Prioritize ideas

How to select the idea to focus on?

Analyze the proportion of users that are impacted by each idea and compare the business the impact.

We could put less effort to drive more impact.

4 Design experiments/Measure success(Optional)

onsite interview

followup question: How to design experiments to test if it is a good idea or not?

5 Summary

Metric Interview Question

Example

What is the goal?

Users forget to upload the photo after signing up.

• Profile photo is an important indicator of the profile completeness, and more complete the profile, the more active user will be after finishing sign up.

Adding a profile photo can add credibility to a new account. User with a profile photo less likely to be a fraudulent user compared with the user without a profile photo.

• We have a guardrail metric to measure things that should not degrade in pursuit of this new features.

Summary

Lyft/Uber Metric Interview Question and Answer

Example

None of the above things happening, how would you investigate the issue?

–

What should we should notice