Warner Bros. Discovery Data Scientist Interview Questions

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

More Behavioral & Leadership questions with a free account

More Machine Learning questions with a free account

7-Day Rolling Active Users

Medium

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

Window FunctionsDate FunctionsRunning Totals

Warner Bros. Discovery

More SQL & Data Manipulation questions with a free account

A/B Testing Autoplay Feature

Hard

Tests end-to-end experimentation planning including power, metrics, and interference or network effects.

experiment designNetwork InterferenceSample Size

Warner Bros. Discovery

More A/B Testing & Experimentation questions with a free account

More Model Evaluation questions with a free account

Create a free account to unlock this list and practice real interview questions.

Evaluating Observed Lift Significance

Medium

Explain how to test whether an observed experiment lift is real using hypothesis testing, p-values, and confidence intervals.

Confidence IntervalsStatistical SignificanceP-Values

Warner Bros. Discovery

More Statistics & Probability questions with a free account

Streaming Experiment Metrics

Medium

Tests metric selection and risk management to ensure experiments improve outcomes without harming user experience.

MetricsFeature Prioritizationuser value

Warner Bros. Discovery

More Product Sense questions with a free account

Diagnosing Metric Drops

Medium

Tests structured troubleshooting using metrics, segmentation, and hypothesis-driven analysis.

RetentionKPIDiagnosis

Warner Bros. Discovery

More Metrics questions with a free account

End-to-End Streaming Recommender

Hard

Tests system design for cold-start recommendations, including data, modeling, and serving considerations.

Cold StartFeature StoreRecommendation Systems

Warner Bros. Discovery

Open any question for its full solution and discussion.