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Updated weekly · Last refresh Oct 17

Meta IT Data Scientist Interview Questions

The questions to prepare for a Meta IT Data Scientist interview. Questions from real interview reports rank first. Updated daily.

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1
A/B Testing & ExperimentationStart here. 5 questions · ~43 min
When to Prefer Quasi-ExperimentsHard

Decide when randomization is infeasible or invalid and when a quasi-experiment is the better causal design.

ExperimentationCausal InferenceA/B TestingMeta IT
Planning Sample Size for a Conversion TestHard

Estimate sample size and power for a conversion experiment with a pre-registered analysis plan and guardrail-based ship rule.

MDEPower AnalysisSample SizeMeta IT
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2
Statistics & Probability5 questions · ~43 min
Compute Mean and VarianceMedium

Evaluates understanding of online statistics and numerical considerations.

VarianceMeta IT
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3
Product Sense4 questions · ~34 min
Engagement Metric for Video FeatureMedium

Assesses metric design rigor and your ability to anticipate gaming and measurement pitfalls.

user engagementedge casesMeta IT
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4
Behavioral & Leadership4 questions · ~34 min
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5
More topics6 questions · ~51 min
7-Day Rolling Active UsersMedium
Practice

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsMeta IT
Diagnose Cross Campaign CTR DropMedium

Investigate a 15% CTR drop across multiple campaigns by decomposing performance and separating measurement issues from real demand changes.

Funnel AnalysisKPIDiagnosisMeta IT
Large-Scale Recommendation SystemHard

Evaluates your end-to-end design skills and your ability to choose metrics for recommender quality.

evaluation metricsarchitectureRecommendation SystemsMeta IT
Optimize CPU AllocationMedium

Evaluates systems thinking for performance, resource utilization, and throughput.

optimizationResource AllocationMeta IT
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
The finish line: interview-readyComplete all 24 questions plus 2 hands-on drills to finish this plan.