Sii Group Italy Data Engineer Interview Questions

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

3questions

~1htotal time

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SQL & Data ManipulationStart here. 1 question + 3 drills · ~38 min

Tests your ability to perform core SQL operations and apply version control in data pipelines.

Optimize a slow PostgreSQL query that aggregates completed transactions while preserving customers with no matching activity.

Calculate a three-day moving average of active-client revenue using aggregation and SQL window functions.

Return the second-highest distinct non-null salary from a single employee table.

Behavioral & Leadership2 questions · ~16 min

Evaluates your practical familiarity with the data engineering toolchain and workflows.

Present Yourself and GoalsEasy

Assesses your communication clarity and alignment of your experience with data engineering work.

salary expectations

Sii Group Italy

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