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Updated weekly · Last refresh Aug 30

Discord Data Scientist Interview Questions

The questions to prepare for a Discord Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

30questions
~4htotal time
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1
SQL & Data ManipulationStart here. 7 questions + 1 drill · ~72 min
SQL: Unique Words Between MessagesHard
Practice

Use PostgreSQL string splitting, CTEs, joins, and window functions to find words unique to two Discord messages.

Data Analysissql queriesstring manipulationDiscord
SQL: Character CountEasy
Practice

Count a target character case-insensitively in a Discord message using PostgreSQL string functions.

Data Analysissql queriesstring manipulationDiscord
Monthly Campaign Performance SummaryEasy
Practice
Practice drill

Aggregate January 2024 campaign data by channel using GROUP BY, filtering, and ordering by total clicks.

JoinsData WranglingAggregationsDNVEversanaDiscord
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2
A/B Testing & Experimentation6 questions · ~53 min
Testing Multiplayer Features With InterferenceHard

Design an experiment for a multiplayer feature where user-level randomization may fail because treatment spills over through player interactions.

Network InterferenceExperimentationGuardrail MetricsDiscord
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchDiscord
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3
Statistics & Probability3 questions · ~26 min
Non-Parametric vs T-TestMedium

Tests judgment about assumptions and selecting appropriate hypothesis tests.

Hypothesis TestingDiscord
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4
Behavioral & Leadership9 questions · ~79 min
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5
More topics5 questions · ~44 min
Design Push Notifications SystemHard

Assesses system design thinking for reliable push notification delivery tied to subscriptions.

system designDiscord
Measure Success of Discord Voice ChannelsMedium

Tests product sense for defining success metrics and evaluation criteria for a Discord feature.

product analysisfeature evaluationsuccess metricsDiscord
Design Discord Advertising KPIsMedium

Evaluates ability to define business-aligned KPIs for a new ads product on Discord.

product analysisKPI developmentDiscord
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The finish line: interview-readyComplete all 30 questions plus 1 hands-on drill to finish this plan.