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Updated weekly · Last refresh Aug 30

Barclays Machine Learning Engineer Interview Questions

The questions to prepare for a Barclays Machine Learning Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
Machine LearningStart here. 14 questions · ~114 min
Tune Hyperparameters for Model SelectionMedium

Choose hyperparameters with cross-validation and validation metrics, while balancing bias, variance, and overfitting.

Hyperparameter TuningCross-ValidationRegularizationBarclays
Bias-Variance Tradeoff in PracticeMedium

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

Cross-ValidationBias-Variance TradeoffRegularizationBarclays
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2
Model Evaluation7 questions · ~57 min
Evaluate Imbalanced Classification ModelsMedium

How to evaluate a finance classification model on an imbalanced dataset using the right metrics and threshold.

PrecisionAUC-ROCRecallBarclays
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3
Pipelines14 questions · ~114 min
Batch vs Streaming Data ProcessingEasy

Compare batch and streaming data processing, including when each fits best in a pipeline.

Stream ProcessingETLBatch ProcessingBarclays
Backfilling Missing Pipeline DataMedium

Approach for safely backfilling missing data while preserving correctness, idempotency, and data quality.

ETLQualityBarclays
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4
Statistics & Probability14 questions · ~114 min
Interpreting P Values in TestingEasy

Explain what a p-value means in hypothesis testing and how it relates to statistical significance.

Hypothesis TestingStatistical SignificanceP-ValuesBarclays
Explaining P Values ClearlyEasy

Explain what a p-value means, how it relates to statistical significance, and how to describe it clearly to non-technical stakeholders.

CommunicationStatistical SignificanceP-ValuesBarclays
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5
More topics1 question · ~8 min
Matrix Multiplication in MLEasy

Tests your understanding of core linear algebra operations used in ML.

MathArraysMatrixBarclays
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