Top 14
Prep plan
Updated weekly · Last refresh Aug 30

OpenX Data Analyst Interview Questions

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

14questions
~2htotal time
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1
SQL & Data ManipulationStart here. 8 questions + 3 drills · ~94 min
Pivot for Trend IdentificationMedium

Tests ability to summarize data and spot trends using pivoting techniques.

pivot tablesData AnalysisOpenX
Year-over-Year Growth by PublisherHard

Tests multi-period metric calculation and correct grouping for publisher-level reporting.

sql queriesAggregationsOpenX
Null Handling for Campaign AveragesMedium

Tests correct treatment of nulls in SQL metrics to avoid biased campaign performance reporting.

sql queriesdata handlingOpenX
Cleaning Inconsistent Log Data in ExcelMedium

Tests practical data cleaning skills for messy log inputs common in ad-tech pipelines.

data cleaningData Manipulationexcel functionsOpenX
Join and Time-Interval AggregationMedium

Tests SQL join logic and time-based aggregation for large-scale ad-tech datasets.

Joinssql queriesAggregationsOpenX
Query Optimization for Millions of RowsHard

Tests performance tuning skills such as indexing, filtering, and query plan awareness.

query optimizationefficiencyOpenX
SQL Top Products QueryMedium
Practice
Practice drill

Rank completed Cloud Software Group product revenue within each category using aggregation and a window function.

sql queriesAggregationsCloud Software GroupObserve.AI
UST SQL: Second Maximum SalaryEasy
Practice
Practice drill

Find every employee earning the second-highest distinct salary using a CTE, DENSE_RANK, and a department join.

sql queriesAggregationsUST
SQL Aggregates in One RowEasy
Practice
Practice drill

Count distinct male and female patients with completed Exusia Care encounters in one result row using a CTE and filtered aggregation.

sql queriesAggregationsExusia
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2
Behavioral & Leadership5 questions · ~40 min
Explaining Technical Issues ClearlyMedium

Tests whether you can translate technical complexity into business-relevant language for non-technical stakeholders and drive action.

Stakeholder ManagementCommunicationtechnical explanationOpenX
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3
More topics1 question · ~8 min
The finish line: interview-readyComplete all 14 questions plus 3 hands-on drills to finish this plan.