QUANTCO Interview Questions
The questions to prepare for QUANTCO interviews, across all roles. Questions from real interview reports rank first. Updated weekly.
Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.
QUANTCOUse a CTE, joins, and distinct aggregates to calculate Meta Logistics bookstore payment metrics.
Meta LogisticsCount 0 and 1 sensor readings by Bosch building using a CTE, LEFT JOIN, and conditional aggregation.
Bosch Building TechnologiesExplain how to test whether an observed experiment lift is real using hypothesis testing, p-values, and confidence intervals.
QUANTCOExplain how bias and variance affect generalization, and how model complexity changes the balance.
QUANTCOExplain shallow vs deep copy in Python, how nested objects behave, and when each approach is appropriate.
QUANTCOTests performance tuning for large-scale data processing in Python.
QUANTCOIdentify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
QUANTCODiagnose a post-release KPI drop by separating instrumentation issues from real behavior changes and tracing the problem through the metric hierarchy.
QUANTCOTests applied modeling choices and validation for revenue-impacting pricing decisions.
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