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Analytics Architecture and Reporting Questions

Designing and operating end to end analytics and reporting platforms that translate business requirements into reliable and actionable insights. This includes defining metrics and key performance indicators for different audiences, instrumentation and event design for accurate measurement, data ingestion and transformation pipelines, and data warehouse and storage architecture choices. Candidates should be able to discuss data modeling for analytics including semantic layers and data marts, approaches to ensure metric consistency across tools such as a single source of truth or metric registry, and trade offs between query performance and freshness including batch versus streaming approaches. The topic also covers dashboard architecture and visualization best practices, precomputation and aggregation strategies for performance, self service analytics enablement and adoption, support for ad hoc analysis and real time reporting, plus access controls, data governance, monitoring, data quality controls, and operational practices for scaling, maintainability, and incident detection and resolution. Interviewers will probe end to end implementations, how monitoring and quality controls were applied, and how stakeholder needs were balanced with platform constraints.

MediumTechnical
63 practiced
Design an automated data quality testing framework for raw_events that come from multiple SDKs. Include types of tests (schema, uniqueness, volume, distribution), tooling choices (dbt tests, Great Expectations, custom jobs), CI integration, production monitoring, and an alert/triage workflow for failures.
MediumTechnical
58 practiced
Compare push-based (webhooks) and pull-based (scheduled pulls) ingestion strategies for third-party marketing APIs. Discuss retry semantics, idempotency key design, how to handle rate limits and schema changes, and how to minimize duplication and ensure reliability.
EasyTechnical
62 practiced
Write a PostgreSQL query that computes weekly active users (WAU) for the last 12 weeks from table events(user_id bigint, event_name text, occurred_at timestamptz). Return week_start (date) and wau (int). Ensure each user is counted at most once per week, account for timezones, and include weeks with zero users.
EasyTechnical
74 practiced
Explain the difference between a KPI, a metric, and a dimension. Provide two concrete examples of each for an e-commerce product team (include names and why they matter). Describe who should own each KPI/metric and how clear definitions improve reporting consistency and downstream decision-making.
HardTechnical
63 practiced
Your analytics cloud bill has tripled year-over-year. Describe a process to identify cost drivers and propose six concrete cost-reduction measures across storage, compute, query optimization, data retention, caching, and data modeling. For each measure, state the expected trade-offs and how you would validate savings.

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