Petronas Data Scientist Interview Questions

The questions to prepare for a Petronas Data Scientist interview. Questions from real interview reports rank first. Updated daily.

5questions

~1htotal time

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SQL & Data ManipulationStart here. 1 question + 2 drills · ~31 min

Calculate daily production and its rolling seven-day average, including zero-output calendar dates.

Calculate daily impressions per active user and its 7-day rolling average using PostgreSQL aggregations and date-based windows.

Calculate cumulative conversion rate and a seven-day rolling average from daily experiment results.

Statistics & Probability1 question · ~11 min

Explain how to establish statistical significance in A/B tests using hypotheses, power, confidence intervals, and safeguards against false positives.

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A/B Testing & Experimentation1 question · ~11 min

Risks of Peeking in Ride-Share TestMedium

Assess why checking experiment results early can inflate false positives and distort ship decisions.

PeekingExperimentationStatistical SignificancePPetronas

Metrics1 question · ~11 min

Diagnosing a Sudden Metric DropHard

Diagnose a sudden 20% KPI decline by validating measurement, decomposing drivers, and separating real behavior changes from data issues.

analyticsKPIdiagnostic processPPetronas

Behavioral & Leadership1 question · ~11 min

Manage Conflict With StakeholdersEasy

Tests conflict resolution, accountability, communication, and the ability to reach a productive outcome.

experiencebehavioral interviewaccountabilityPPetronas

The finish line: interview-readyComplete all 5 questions plus 2 hands-on drills to finish this plan.