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Prep plan
Updated weekly · Last refresh Aug 30

CACI International Data Scientist Interview Questions

The questions to prepare for a CACI International Data Scientist interview. Questions from real interview reports rank first. Updated weekly.

36questions
~5htotal time
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1
SQL & Data ManipulationStart here. 6 questions + 2 drills · ~71 min
2
Machine Learning6 questions · ~51 min
Bias-Variance Tradeoff in PracticeMedium

Explain the bias-variance tradeoff and how it guides model choice, regularization, and generalization performance.

Cross-ValidationBias-Variance TradeoffRegularizationCACI International
Predictive Maintenance Failure ModelingHard

Design a machine learning system to predict equipment failures before they happen using sensor, event, and maintenance data.

Cross-ValidationFeature EngineeringSupervised LearningCACI International
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3
Statistics & Probability5 questions · ~43 min
Statistical Significance in Business DecisionsEasy

Explain what statistical significance means, how p-values and confidence intervals support decisions, and why significance alone is not enough.

Hypothesis TestingStatistical SignificanceP-ValuesCACI International
Explaining Confidence IntervalsEasy

Explain what a confidence interval means and how to communicate it to a non-technical stakeholder.

Confidence IntervalsHypothesis TestingCommunicationCACI International
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4
A/B Testing & Experimentation6 questions · ~51 min
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchCACI International
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5
Product Sense3 questions · ~26 min
Measure New Dashboard Feature SuccessMedium

Define a framework to measure whether a new observability dashboard feature is delivering real value and sustained adoption.

Feature PrioritizationUser NeedsProduct VisionCACI International
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6
Behavioral & Leadership8 questions · ~68 min
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7
More topics2 questions · ~17 min
Significance of a Metric DropMedium

Evaluates your approach to hypothesis testing for product metric changes.

Statistical SignificanceCACI International
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The finish line: interview-readyComplete all 36 questions plus 2 hands-on drills to finish this plan.