New Interview Questions: May 2026
Questions added to the Dataford question bank in May 2026, ranked by how often they are asked in real interviews.
Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.
Meta
Acumen
CorningImplement an LRU cache in O(1) average time using a hash table and doubly linked list.
Allianz
ICF
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Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.
Brex
CNA
ProgynyExplain how you used a KPI and supporting metrics to diagnose a product issue and make a concrete product decision.
Brex
Dyneti TechnologiesDescribe a time you had to choose between speed, quality, and scope, and how you aligned stakeholders around the trade-off.
Metronet
Crescent Electric Supply
NationwideA framework for connecting user needs to business goals, then making product decisions with clear trade-offs and measurable outcomes.
Incomm
Nuance
BookingDesign the core pipeline infrastructure for a new project, with attention to orchestration, data quality, idempotency, and future scale.
Nationwide
TetraScienceDesign a production ranking system with robust feature drift monitoring across batch and real-time features at high QPS.
Alpaca
World Wide TechnologyMeta