Practice real data science interviews tuned by the interviewers who actually run them.

Create a free account and your first session is on us — then $3 per session, no subscription.

75

Session complete

Friend Content in Newsfeed · Meta · Product Sense

01Define ‘enough’84Strong

02Diagnose the gap88Strong

03Segment the analysis45Weak

04Design the experiment81Strong

Top growth area

Your one soft spot is segmentation. You reasoned well in aggregate but didn’t split the problem — break it out by user type and network size (new users vs. power users with large networks) before drawing conclusions.

Real case study interviews from

Diagnosing Metric Changes

Investigate drops, decompose metrics, find root causes

TikTokProduct SenseHard~30 min

Algorithm Change — Creator Impact

TikTok's recommendation team optimized for watch-through rate instead of engagement rate. Watch time is up 5%, but creator follower growth is down 8%. The creator partnerships team is concerned. Investigate.

Root cause analysisEcosystem tradeoffExperiment designCreator economics

Start session →

Measuring Feature Success

Define metrics, track impact, identify issues

TikTokProduct SenseHard~30 min

For You Feed Diversification

TikTok's recommendation team wants to show more content from emerging creators in the For You feed. Currently, the top 5% of creators generate 60% of all views. The proposal: allocate 20% of feed slots to creators with fewer than 10K followers. How would you measure success?

Ecosystem thinkingMetric definitionTradeoff reasoningExperiment design

Start session →

Navigating Tradeoffs

Multi-stakeholder reasoning, optimization under constraints

TikTokProduct SenseHard~30 min

TikTok LIVE Monetization

TikTok LIVE's gift revenue is up 20% month-over-month, but the number of unique gift senders is down 10%. The growth team celebrates the revenue; the trust & safety team is worried. You're asked to investigate.

Metric decompositionRisk assessmentStakeholder reasoningRevenue analysis

Start session →