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Data and Analytics Infrastructure Questions

Designing building and operating end to end data and analytics platforms that collect transform store and serve event product and revenue data for reporting analysis and decision making. Core areas include event instrumentation and tag management to capture user journeys marketing attribution and experimental events; data ingestion strategies and connectors; extract transform load pipelines and streaming processing; orchestration and workflow management; and choices between batch and real time architectures. Candidates must be able to design storage and serving layers including data warehouses data lakes lakehouse patterns and managed analytical databases and to choose storage formats partitioning and indexing strategies driven by volume velocity variety and access patterns. Data modeling for analytics covers raw event layers curated semantic layers dimensional modeling and metric definitions that support business intelligence and product analytics. Governance and reliability topics include data quality validation freshness monitoring lineage metadata and cataloging schema evolution master data considerations and role based access control. Operational concerns include scaling storage processing and query concurrency fault tolerance and resiliency monitoring and observability alerting cost and performance trade offs and capacity planning. Finally candidates should be able to evaluate and select tools and frameworks for orchestration stream processing and business intelligence integrate analytics platforms with downstream consumers and explain how architecture and operational choices support marketing product and business decisions while balancing tooling investment and team skills.

MediumBehavioral
100 practiced
Tell me about a time you had to balance paying down technical debt versus delivering a visible analytics feature for a client. Use the STAR format: situation, task, action, result. Focus on how you evaluated risk, communicated trade-offs, and the outcome.
MediumTechnical
69 practiced
You're advising a sales team preparing a low-cost proof-of-concept (PoC) analytics platform for a customer. Describe a minimal, low-risk architecture you would propose that demonstrates core business value within 4 weeks, listing the components to include, what to trade off, and how you'd present trade-offs to the customer.
HardSystem Design
80 practiced
Architect a fault-tolerant and cost-efficient lakehouse on S3 (or equivalent object storage) for petabytes of historical data that supports ACID semantics, time-travel, and efficient compaction. Evaluate Delta Lake, Apache Iceberg, and Apache Hudi and justify which you would choose for: strong ACID guarantees, multi-engine reads (Spark, Presto), and low-latency interactive queries.
EasyTechnical
57 practiced
Define schema evolution and explain how column additions, deletions, and type changes are handled in popular file formats like Avro and Parquet. As a Solutions Architect, describe patterns you would use in pipelines to support forward/backward compatibility and safe rollouts of changes.
MediumTechnical
54 practiced
Design an orchestration and backfill strategy using Airflow for a data platform that runs both batch and streaming-derived tables. Explain DAG structuring, idempotency of tasks, backfill mechanics, SLA enforcement, and how you would handle schema changes during backfills.

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