### Group Video-Calling Feature Analysis #### Scenario Designing and analyzing a new group video-calling feature using historical one-to-one video call data. #### Key Questions ##### 1. Business Goal What is the business goal of this feature? ##### 2. User Identification & Data Requirements How would you identify which users are most interested in group video calls and what additional data would improve the analysis? ##### 3. Participant Limit Analysis Should we impose a participant limit on group calls? Explain how you would determine the optimal cap. ##### 4. Success Metrics & Measurement Which success metrics would you track after launch and how would you measure cannibalization versus incremental engagement? ##### 5. Experiment Design [Bonus] How would you design the experiment? #### Important Considerations ##### Hints - **Network Effect**: You need to consider the network effect when designing the experiment

This question evaluates a candidate's competency in product analytics, experimental design, causal inference, user segmentation, modeling for launch decisions, and accounting for network effects and metric definition.

How do I approach Analytics & Experimentation interview questions?

Analytics & Experimentation questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master analytics & experimentation interviews.

What difficulty level is this interview question?

This is a hard difficulty Analytics & Experimentation question, commonly asked during Technical Screen rounds at Meta.

What role is this question designed for?

This question is commonly asked for Data Scientist candidates at Meta during technical interviews.

Identify User Interest in Group Video Calls Using Data

Group Video-Calling Feature Analysis

Context

You are asked to design, launch, and analyze a new group video-calling feature for a large social/messaging app. You currently only have historical one-to-one (1:1) video call data. Address the business context, data and modeling needs, participant limits, post-launch metrics, and an experiment design that accounts for network effects.

Questions

Business Goal
- What is the primary business goal of launching group video calls?
User Identification and Data Requirements
- How would you identify which users are most interested in group video calls using 1:1 call history?
- What additional data would improve the analysis?
Participant Limit Analysis
- Should the product impose a participant limit (cap)?
- How would you determine the optimal cap?
Success Metrics and Measurement
- Which success metrics would you track after launch?
- How would you measure cannibalization versus incremental engagement?
Experiment Design (Bonus)
- How would you design an experiment that accounts for network effects?

Important Consideration

Hint: Explicitly consider network effects when designing the experiment.

Context

Questions

Business Goal

What is the primary business goal of launching group video calls?

User Identification and Data Requirements

How would you identify which users are most interested in group video calls using 1:1 call history?
What additional data would improve the analysis?

Participant Limit Analysis

Should the product impose a participant limit (cap)?
How would you determine the optimal cap?

Success Metrics and Measurement

Which success metrics would you track after launch?
How would you measure cannibalization versus incremental engagement?

Experiment Design (Bonus)

How would you design an experiment that accounts for network effects?

Identify User Interest in Group Video Calls Using Data

Quick Overview

Group Video-Calling Feature Analysis

Context

Questions

Important Consideration

Solution

Comments (0)

Identify User Interest in Group Video Calls Using Data

Quick Overview

Group Video-Calling Feature Analysis

Context

Questions

Important Consideration

Solution

Comments (0)