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Updated weekly · Last refresh Aug 30

EXL Service Philippines Data Visualisation Specialist Interview Questions

The questions to prepare for a EXL Service Philippines Data Visualisation Specialist interview. Questions from real interview reports rank first. Updated weekly.

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1
SQL & Data ManipulationStart here. 11 questions + 3 drills · ~118 min
Manage Slowly Changing DimensionsMedium

Tests dimensional modeling techniques for historical accuracy in analytics.

slowly changing dimensionsdata managementData ModelingEXL Service Philippines
Minimize Production Data Refresh TimeMedium

Tests optimization strategies for reliable, timely refreshes in production reporting.

performanceproduction environmentEXL Service Philippines
Choose Star vs SnowflakeMedium

Tests dimensional modeling knowledge and tradeoffs for analytics performance.

snowflake schemastar schemaData ModelingEXL Service Philippines
Optimize Slow Power BI DashboardsMedium

Tests performance tuning skills for Power BI datasets and report responsiveness.

performance optimizationdata handlingpower biEXL Service Philippines
Transform Data Before VisualizationMedium

Tests ETL and SQL transformation approach to support reliable, clean reporting.

sqlEXL Service Philippines
Power BI Enterprise License PlanningMedium

Tests ability to plan compliant Power BI setups for enterprise governance and scale.

enterprise deploymentpower biEXL Service Philippines
Running Average for Last 5 DaysEasy
Practice
Practice drill

Calculate a calendar-aware five-day running average of daily sales using CTEs and window functions.

Window FunctionssqlEXL Service Philippines
Second Highest Trader SalaryEasy
Practice
Practice drill

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingeClinicalWorksInformaticaSpectraforce Technologies
Optimize Complex Query for Compute EfficiencyHard
Practice
Practice drill

Optimize a complex SQL query to reduce compute credits in PostgreSQL.

Data WranglingAutodeskEXL Service Philippines
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2
More topics3 questions · ~24 min
Design for Real-Time KPI MonitoringMedium

Tests dashboard design decisions for executive monitoring and operational clarity.

dashboard designEXL Service Philippines
Handle Misleading Chart RequestsMedium

Tests stakeholder communication and ethical data storytelling under client pressure.

Stakeholder Managementclient communicationdata visualizationEXL Service Philippines
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