New Interview Questions: March 2026
Questions added to the Dataford question bank in March 2026, ranked by how often they are asked in real interviews.
Calculate the monthly spending trends for customers using window functions and joins.
The Home Depot
Hewlett Packard Enterprise
ConvoyMerge overlapping intervals in a list of intervals.
Dow Jones
360Learning
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Assess the 15% drop in user engagement after a new app feature release and propose metric decomposition strategies.
Sage
Beacon Talent
DeelDesign an ETL pipeline to process 10TB of data daily from multiple sources into a data warehouse with strict data quality checks.
New York Power Authority
Circana
LenovoDifferentiate between Type I and Type II errors in hypothesis testing with a practical example.
Grab
Webmd
National Oilwell VarcoCompare two rent prediction models and decide whether MAE or RMSE is the better selection metric given costly large errors.
Toyota Motor
Vodafone
Colgate-PalmoliveRedesign user onboarding process using new technology to improve user engagement and retention rates.
ButterflyMX
Oura
GloboforceDiscuss the architecture of Transformers, focusing on self-attention and its impact on NLP tasks.
Amazon
Google