C5i Data Analyst Interview Questions

The questions to prepare for a C5i Data Analyst interview. Questions from real interview reports rank first. Updated weekly.

Adapting to a New Tool

Easy

Tests learning agility and ownership when adopting unfamiliar tools or techniques under real project pressure.

learning agilityToolsadaptability

C5i

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Explain Full Outer vs Left Join

Medium

Explain how FULL OUTER JOIN and LEFT JOIN differ when reconciling customer records across systems.

JoinsData WranglingCase When

C5i

Second Highest Without Aggregates

Medium

Tests SQL reasoning under strict constraints and ability to compute rankings without aggregates.

SubqueriesRankingSelf-Joins

C5i

Finding and Removing Duplicates

Medium

Tests SQL skills for deduplication and safe data modification practices.

sqldata integrity

C5i

Indexing and Query Performance

Medium

Tests understanding of database indexing tradeoffs and performance implications.

Performance Tuningindexessql

C5i

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Choosing KPIs for Retention

Medium

Tests KPI design and ability to translate business goals into measurable metrics.

RetentionKPI

C5i

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