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Data Society Interview Questions

The questions to prepare for Data Society interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
CodingStart here. 8 questions · ~76 min
Linked List ReversalEasy
Practice

Reverse a singly linked list in-place using iterative pointer manipulation.

RecursionLinked ListsArraysData Society
Longest Substring Without RepeatsMedium
Practice

Find the longest substring with all unique characters using a sliding window.

Hash TablesStringsTwo PointersData Society
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2
Machine Learning8 questions · ~76 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffData Society
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3
Execution8 questions · ~76 min
Prioritize Work Under Tight DeadlinesEasy

Explain how you prioritize competing work under time pressure while making trade-offs and keeping stakeholders aligned.

Trade-offsRoadmappingScope ManagementData Society
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4
Pipelines7 questions · ~67 min
Cleaning Missing Values in PipelinesEasy

Approach for handling missing values in a pipeline with data quality checks and repeatable transformations.

Data WranglingETLQualityData Society
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5
Model Evaluation8 questions · ~76 min
Explain Core Classification MetricsEasy

Explain precision, recall, F1-score, and ROC-AUC for a classification model.

F1 ScorePrecisionAUC-ROCData Society
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6
SQL & Data Manipulation4 questions + 3 drills · ~68 min
7
More topics7 questions · ~67 min
Rare Event Detection Under ImbalanceMedium

Explain how to evaluate and reason about rare event prediction when the positive class is extremely uncommon.

SamplingBiasmodelingData Society
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