Dataford
Top 50
Prep plan
Updated weekly · Last refresh Aug 30

Persistent Systems Data Scientist Interview Questions

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

50questions
~7htotal time
Track your progressSign up free to work through all 50 questions and resume where you left off.
Start practicing free →
1
Model EvaluationStart here. 7 questions · ~59 min
Interpret AUC-ROC for Marketing ModelEasy

Interpret what a 0.84 AUC-ROC means for a marketing response model and explain why threshold and calibration still matter.

CalibrationAUC-ROCThreshold TuningPersistent Systems
More Model Evaluation questions with a free account
2
Machine Learning7 questions · ~59 min
Handling Imbalanced Fraud LabelsMedium

Explain how to train and evaluate models on highly imbalanced fraud data without relying on misleading accuracy.

Cross-ValidationFeature EngineeringSupervised LearningPersistent Systems
More Machine Learning questions with a free account

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
3
Metrics6 questions · ~51 min
Evaluate A/B Test Results for New FeatureMedium

Assess the impact of a new feature on conversion rates through A/B testing analysis and statistical significance evaluation.

ExperimentationA/B TestingPersistent Systems
More Metrics questions with a free account
4
Statistics & Probability7 questions · ~59 min
A/B Test vs Observational LiftEasy

Compare a randomized A/B test with observational analysis and test whether the checkout conversion lift is statistically significant.

ExperimentationCausal InferenceA/B TestingPersistent Systems
More Statistics & Probability questions with a free account
5
Pipelines7 questions · ~59 min
Automate Databricks Pipeline DeploymentsMedium

Design an automated Databricks CI/CD and operations model for 120 pipelines with safe promotion, SLA monitoring, rollback, and data quality gates.

ToolsOrchestrationQualityPersistent Systems
More Pipelines questions with a free account
6
NLP7 questions · ~59 min
Classify Documents by TypeEasy

Build an NLP pipeline to classify incoming documents into document types using modern transformer fine-tuning.

Text ClassificationNamed Entity RecognitionTokenizationPersistent Systems
More NLP questions with a free account
7
More topics9 questions · ~76 min
Resolve Conflicting Metric Test ResultsHard

Design an experiment where a workflow change lifts containment but may hurt CSAT, and define a ship rule that respects guardrails.

ExperimentationGuardrail MetricsA/B TestingPersistent Systems
Prioritize Features for AI ProductsMedium

A framework for prioritizing AI product features based on user value, feasibility, evaluation quality, and trade-offs.

Feature PrioritizationValue PropositionPersistent Systems
More questions with a free account
The finish line: interview-readyComplete all 50 questions to finish this plan.