FAQ

What’s the single biggest reason a Data Scientist fails the window‑function round at FAANG?
Because they treat the window as a syntax exercise instead of a latency‑aware product decision. The hiring committee at Google, Amazon, Meta, Netflix, and Stripe all cite “lack of performance story” as the decisive factor.

Should I mention compensation expectations during the interview?
Never bring salary into the technical loop. The panel at Stripe flagged a $180k ask as a red flag because it signaled a lack of business‑impact framing. Discuss compensation only after a hiring manager signals interest.

Is it better to write one monolithic query or split into stages?
Split into stages. The Netflix debrief showed a 6‑vote rejection for a single‑query approach that materialized 12 TB of data. Two‑stage pipelines consistently earn a “Strong Hire” because they align with the company’s KPI‑driven architecture.amazon.com/dp/B0GWWJQ2S3).