Top 50 Time Series Interview Questions
The most frequently asked Time Series questions across all roles and companies, ranked by real interview frequency. Updated daily.
Calculate 30-day rolling test averages for TÜV SÜD facilities using joins and a time-based window function.
Compute daily paid GMV and a 7-day trailing moving average using aggregation + window functions.
Balyasny Asset Management
Amazon Development Center U.S.Build a daily series and compute a 30-day trailing moving average of task bookings using window functions.
TaskRabbit
RBCCalculate each rolling average in a price series using a fixed-size sliding window and running sum.
T. Rowe Price
GEP
BinanceCompute each patient's inclusive rolling 30-day claim-cost average after sorting claims by patient and date.
OptumMaintain Vercel hit timestamps and count requests in inclusive time ranges using sorted insertion and binary search.
VercelCreate chronological expanding-window validation splits with configurable gaps to prevent future-data leakage.
Calculate a zero-risk-free Sharpe ratio from a return series using population volatility and explicit zero-variance handling.
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