Gemini Data Scientist Interview Questions
Master your tech interview with our curated database of real questions from top companies.
Detect k events in a sliding window
Implement an algorithm that, for each user, determines whether there exists a set of at least k ACH credit events from distinct device_ids within any ...
Design offline backtest and online experiment
You are given an ACH transaction-level dataset to identify and control fraud and will present a plan. Today is 2025-09-01. Deliverables - Offline anal...
Compute power and cost-aware thresholds
You are evaluating a new ACH velocity+shared-device block rule. Assumptions - Volume: 1,000,000 ACH credits/month. - Baseline fraud prevalence: 0.15% ...
Lead a cross-team fraud incident response
Describe a specific time you led a high-severity ACH fraud incident from detection to resolution. Include: (1) the first on-call signal you saw, (2) t...
Write SQL/Python for ACH fraud analytics
As of today (2025-09-01), use the following schema and tiny samples to answer. Provide SQL for the SQL parts and Python for the Python part. Schema - ...