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Calamos Investments Quantitative Analyst Interview Questions

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

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1
Machine LearningStart here. 4 questions · ~32 min
Handling Overfitting in Predictive ModelsMedium

Explain how to diagnose and reduce overfitting using regularization, validation strategy, and model complexity controls.

Cross-ValidationBias-Variance TradeoffRegularizationCalamos Investments
Neural Networks vs RegressionMedium

Assesses model selection judgment and understanding of tradeoffs in financial modeling.

Neural NetworksCalamos Investments
Tree-Based Models in PracticeMedium

Evaluates practical ML modeling skills and ability to explain modeling choices.

Machine LearningCalamos Investments
Walk me through a recent machine learning project Medium

Walk me through a recent machine learning project you deployed. What were the biggest technical hurdles?

Cross-ValidationFeature EngineeringSupervised LearningCalamos Investments
2
Behavioral & Leadership6 questions · ~48 min
Most Relevant Analytical ExperienceEasy

Tests whether you can connect your resume to the role through specific analytical work, ownership, and stakeholder impact.

backgroundqualificationsself introductionCalamos Investments
Why Calamos Investments FitEasy

Assesses motivation and alignment with Calamos Investments as an investment manager.

career goalscompany fitmotivationCalamos Investments
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3
More topics2 questions · ~16 min
Process for Cleaning Messy DataMedium

Tests end-to-end data cleaning workflow and validation before analysis.

data cleaningexperienceprocessCalamos Investments
Statistics and Probability FoundationsMedium

Tests command of statistics and probability concepts used in quant research.

statisticsresumeCalamos 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
SQL Missing Marks RuleEasy
Practice
Practice drill

Use GROUP BY and HAVING to exclude students missing marks in two or more subjects.

data cleaningsqlPayPal
Clean Incomplete Salesforce Lead RecordsMedium
Practice
Practice drill

Clean Salesforce lead data with CTEs, LEFT JOINs, CASE, and COALESCE to standardize missing values for analysis.

missing valuesdata preparationdata cleaningSalesforce
The finish line: interview-readyComplete all 12 questions plus 3 hands-on drills to finish this plan.