New Interview Questions: February 2026
Questions added to the Dataford question bank in February 2026, ranked by how often they are asked in real interviews.
Compute a lexicographically smallest topological order of tasks; return [] if the dependency graph has a cycle.
AmazonParse and evaluate a restricted JS-like assertion string using a stack-based expression parser.
TaskRabbitProblem A cybersecurity team at a healthcare SaaS provider scans customer “export bundles” before they’re uploaded to cloud storage. Each bundle is represe...
ReplitCompute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.
ADPReconcile a Power BI revenue KPI to source-of-truth payments using joins, aggregations, and window functions.
The Johns Hopkins UniversityBuild a 14-row readiness time series per user with a 7-day moving average and an up/down/flat trend label using window functions.
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Compute per-variant sample size and runtime to detect a 0.6pp checkout conversion lift with 80% power at α=0.05.
TaskRabbit
Vanguard
DONE by NONECompute and interpret a two-proportion z-test p-value for a checkout A/B test, and explain what the p-value does not mean.
payactiv