Dataford
Dataford
Top 16
Prep plan
Updated weekly · Last refresh Oct 17

Sii Group Italy Data Analyst Interview Questions

The questions to prepare for a Sii Group Italy Data Analyst interview. Questions from real interview reports rank first. Updated daily.

16questions
~2htotal time
Track your progressSign up free to work through all 16 questions and resume where you left off.
Start practicing free →
1
SQL & Data ManipulationStart here. 4 questions + 3 drills · ~62 min
Understanding Common Table Expressions (CTEs)Medium

Explain what CTEs are and their advantages in SQL queries.

CTEsSii Group Italy
Customer Orders: LEFT vs INNER JOINEasy

Explain how INNER JOIN and LEFT JOIN differ, and when to use each for matched-only versus all-left-row analysis.

JoinsData WranglingGroup BySii Group Italy
GROUP BY vs PARTITION BYMedium

Tests your understanding of SQL aggregation versus window functions.

Window FunctionsGroup ByAggregationsSii Group Italy
Optimizing Slow SQL QueriesHard

Tests your ability to diagnose and optimize complex SQL performance issues.

Performance TuningJoinsAggregationsSii Group Italy
Top Daily Rides by VehicleMedium
Practice
Practice drill

Rank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.

Window FunctionsJoinsData WranglingWaymoCruise
Advanced SQL: Joins, Windows, CTEHard
Practice
Practice drill

Analyze monthly bookstore revenue, rank books within genres, and compare genre revenue with the previous month.

Window FunctionsJoinsCTEsMeta
Top Students by DepartmentMedium
Practice
Practice drill

Identify the highest-GPA students representing the top 10% within each department.

Window FunctionsJoinsRankingUniversity of Michigan

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
2
Behavioral & Leadership12 questions · ~96 min
Executing Through Ambiguous RequirementsMedium

Tests how you handle ambiguity while maintaining accuracy, documentation discipline, and ownership of the final output.

AccuracystarDealing With AmbiguitySii Group Italy
Explaining Technical Complexity to Business PartnersEasy

Tests communication of complex technical ideas to non-technical partners, including clarity, stakeholder alignment, and influence on decisions.

Stakeholder ManagementCommunicationexplanationSii Group Italy
Prioritizing Conflicting High-Stakes WorkEasy

Tests prioritization under pressure, stakeholder management, and ownership when multiple urgent requests compete for limited time.

Stakeholder ManagementOwnershipDealing With AmbiguitySii Group Italy
Walk Through Your BackgroundMedium

Assesses communication of experience and relevance of skills for data analytics work.

skillsSii Group Italy
More Behavioral & Leadership questions with a free account
The finish line: interview-readyComplete all 16 questions plus 3 hands-on drills to finish this plan.