DataScan Interview Questions
The questions to prepare for DataScan interviews, across all roles. Questions from real interview reports rank first. Updated daily.
Reverse a string in Python using character traversal and return the reversed result.
DataScanUse a hash map to find two array elements that sum to a target in O(n) time.
DataScanImplement binary search to find a target value in a sorted array in O(log n) time.
DataScanExplain how you would diagnose and recover a project that is falling behind schedule without losing stakeholder trust.
DataScanExplain how you would balance technical debt reduction with feature delivery when stakeholders want visible progress but engineering risk is rising.
DataScanTests incident triage, debugging workflow, and communication during outages.
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Tests your ability to improve query performance and reason about database execution.
DataScanEvaluates your approach to diagnosing and improving performance in production-scale systems.
DataScanAggregate project usage to identify frequently used data analysis tools and compare their hours and ratings.
Limeade
LaSalle Network
E15 GroupRank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.
Waymo
CruiseIdentify the highest-credit-score 5% of applicants within each state using percentiles and window ranking.
American Credit Acceptance