Roku Interview Questions
Master your tech interview with our curated database of real questions from top companies.
Measure Speaker's Impact Using Propensity Score Matching
Causal Impact of Optional Device Ownership on Engagement (Observational Design) Scenario A new, optional smart speaker is released. Some users purchas...
Describe Aligning Goals with Cross-Functional Teams
Behavioral: Cross-Functional Collaboration (Data Scientist Phone Screen) Context You are interviewing for a Data Scientist role where you partner with...
Analyze Profit Decline: Data Collection and Hypothesis Testing
Coffee Shop Profit Drop Diagnostics Scenario You manage a coffee shop and notice profits have declined over a recent period. Task Outline a systematic...
Explain Bias-Variance Trade-off Simply for Stakeholders
Scenario You are in a technical phone screen for a Data Scientist role. The interviewer asks you to communicate a core modeling concept in plain langu...
Write SQL for profit, growth, retention
Write ANSI-SQL (PostgreSQL preferred) for the tasks below. Assume all timestamps are UTC and that "today" = 2025-09-01. Schema: - products(product_id ...
Demonstrate cross-functional collaboration and influence
Behavioral Prompt — Cross-Functional Collaboration (STAR) Provide a specific example of cross-functional collaboration with a Product Manager (PM) and...
Explain and quantify bias-variance tradeoff
Bias–Variance Tradeoff: Intuition, Derivation, and Practical Tuning Task Explain the bias–variance tradeoff at two levels and connect it to model tuni...
Measure speaker impact without A/B testing
Your company launched an optional smart speaker on 2025-01-10. Adoption is voluntary; 6% of existing app users purchase within 60 days, and you cannot...
Diagnose coffee-shop profit decline
You run a single-location coffee shop. In August 2025, profit dropped 18% vs July while transactions fell 4% and average check rose 2%. You have these...