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Updated weekly · Last refresh Sep 23
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Improvado Data Analyst Interview Questions

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

6questions
~1htotal time
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1
Window FunctionsStart here. 2 questions + 2 drills · ~36 min
Top 5 Campaigns Per MonthMedium

Tests window function usage for ranking and partitioned top-N selections in marketing data.

Window FunctionsData Analysissql queriesIImprovado
Window Functions vs AggregationsMedium

Tests understanding of window functions versus group aggregations for marketing reporting use cases.

Window FunctionsAggregationsIImprovado
Consecutive Activity Days QueryMedium
Practice
Practice drill

Identify each user's consecutive website activity streaks using date arithmetic and SQL window functions.

Window FunctionsDate FunctionsData ManipulationIntuit Management ConsultancyChewyAllstate
Window Functions in SQLMedium
Practice
Practice drill

Write a PostgreSQL window function query that returns each employee's latest review, including employees without reviews.

Window Functionsnull handlingJoinsGlassdoor
2
Performance Tuning1 question · ~8 min
Optimizing Slow SQL QueriesHard

Tests performance tuning skills including query structure, indexing, and execution plan reasoning.

Performance Tuningquery optimizationsqlIImprovado

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3
Data Analysis1 question + 1 drill · ~18 min
Calculating CPA Per ChannelMedium

Tests ability to compute marketing KPIs correctly from spend and conversion data.

Data Analysissql queriesIImprovado
Donor-to-Acceptor Ratio QueryMedium
Practice
Practice drill

Use aggregation and joins to identify the cities with the highest and lowest donor-to-acceptor ratios.

null handlingJoinsData AnalysisMeesho
4
data cleaning1 question · ~8 min
Handling Nulls in Marketing DataMedium

Tests data cleaning and SQL logic for robust KPI calculations under incomplete data.

data cleaningnull handlingdata integrityIImprovado
5
data relationships1 question · ~8 min
Joining Datasets With Different GranularitiesMedium

Tests SQL join strategy and correctness when aligning metrics across mismatched aggregation levels.

data relationshipsJoinscomplex queriesIImprovado
The finish line: interview-readyComplete all 6 questions plus 3 hands-on drills to finish this plan.