Business Intelligence Background Questions

A summary of business intelligence experience including the BI platforms and tools used, types of dashboards and reports built, data volumes and sources, analytical methods, stakeholder consumption patterns, and measurable business outcomes. Candidates should explain how BI efforts influenced decisions, examples of ETL or modeling work, and any leadership or ownership of BI initiatives.

MediumTechnical

23 practiced

A BI query joins a 100 billion row fact table to several dimensions and takes minutes. List concrete optimizations you would apply to bring latency down to a few seconds: consider partitioning, clustering, indexes, materialized views, pre-aggregation, query rewrite, and caching. Explain trade-offs for each.

EasyTechnical

40 practiced

Given a table events with schema:

events(
  user_id INT,
  event_type VARCHAR,
  occurred_at TIMESTAMP
)

Write an ANSI SQL query to compute weekly active users (WAU): number of distinct user_id per ISO week for the last 12 weeks. Return columns: week_start, week_iso, wau. Explain how you handle timezones and days with zero activity.

HardTechnical

24 practiced

Provide pseudocode for a stream processor (Kafka Streams or Flink) that deduplicates events and computes per-user daily aggregates with exactly-once semantics. Describe state management, checkpointing, event keying, watermarking, and how you would write results to a serving store.

EasyTechnical

21 practiced

Describe how you would implement a responsive time-series line chart in an HTML/JS dashboard that supports zooming, panning, and tooltips. Which visualization library would you choose (D3, Chart.js, Vega-Lite, or others) and why? Include performance considerations for large point counts.

MediumTechnical

21 practiced

Case study: a PM asks for a dashboard to reduce user churn. Describe which metrics and cohorts you would include, how you would instrument events and identify churn, what exploratory analyses and visualizations you would build, and which experiments you would run to validate interventions.

Unlock Full Question Bank

Get access to hundreds of Business Intelligence Background interview questions and detailed answers.

Join thousands of developers preparing for their dream job.