Commonwealth Bank of Australia Data Scientist Interview Questions
The questions to prepare for a Commonwealth Bank of Australia Data Scientist interview. Questions from real interview reports rank first. Updated weekly.
Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.
Commonwealth Bank of AustraliaExplain the bias-variance tradeoff and how it guides model choice, regularization, and generalization performance.
Commonwealth Bank of AustraliaIdentify major online experiment pitfalls and explain how they can bias results in a streaming product A/B test.
Commonwealth Bank of AustraliaApproach for deciding which user problem to solve first when multiple requests compete.
Commonwealth Bank of AustraliaInvestigate whether an 8.2% DAU decline is driven by product breakage, logging issues, or normal seasonal patterns.
Commonwealth Bank of AustraliaCompute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.
Commonwealth Bank of AustraliaExplain how to test whether an observed 5% conversion rate drop is statistically significant in an experiment or before-after comparison.
Commonwealth Bank of AustraliaExplain how you evaluate models using the right metrics, validation strategy, and error analysis for the problem.
Commonwealth Bank of AustraliaSign up to see every question
Create a free account to unlock this list and practice real interview questions.
Find the top 3 customers in each region by transaction volume using joins, aggregation, and window ranking.
JPMorganChase
Silicon Valley Bank
NaviCalculate weekly active purchasers and week-over-week growth rate from daily transactions using CTEs, date truncation, and aggregation.
Publicis Groupe
IntuitCommonwealth Bank of Australia