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Updated weekly · Last refresh Aug 30

Calamos Investments Data Analyst Interview Questions

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

16questions
~2htotal time
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1
Behavioral & LeadershipStart here. 10 questions · ~80 min
Choosing Visualization Tools Under PressureMedium

Tests stakeholder-aware communication and data-driven judgment when selecting visualization tools for operational reporting.

softwareToolsdata visualizationCalamos Investments
Prioritizing Across Competing Client ProjectsEasy

Tests prioritization under pressure across multiple projects, including trade-off judgment, stakeholder communication, and ownership of outcomes.

OwnershipPrioritizationCalamos Investments
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2
More topics6 questions · ~48 min
Handling Missing DataHard

Tests data quality handling and correct treatment of missingness.

Window FunctionsData WranglingCTEsCalamos Investments
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityCalamos Investments
Diagnose a Performance DropHard

Investigate whether a performance decline is seasonal or a real product issue.

Leading IndicatorsDiagnosisTime SeriesCalamos Investments
Competitive Analysis ProcessMedium

Tests structured research, synthesis, and how you translate findings into actionable insights.

User NeedsUse CasesProduct VisionCalamos Investments
Identify Trends and OutliersMedium

Tests practical data exploration skills using statistical and visualization techniques.

DistributionsRegressionCorrelationCalamos Investments
Statistical Methods to Improve ProcessMedium

Tests ability to apply statistics to drive measurable improvements.

Hypothesis TestingCausal InferenceStatistical SignificanceCalamos Investments

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Second Highest Without AggregatesHard
Practice
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
30-Day Moving Average of BookingsMedium
Practice
Practice drill

Build a daily series and compute a 30-day trailing moving average of task bookings using window functions.

Window FunctionsData WranglingAggregationsTaskRabbitRBC
The finish line: interview-readyComplete all 16 questions plus 3 hands-on drills to finish this plan.