United Nations Software Engineer Interview Questions
The questions to prepare for a United Nations Software Engineer interview. Questions from real interview reports rank first. Updated weekly.
Implement an LRU cache in O(1) average time using a hash table and doubly linked list.
United NationsMerge overlapping intervals in a list of intervals.
United NationsExplain practical SQL methods for analyzing large datasets, including filtering, aggregation, sampling, and performance-aware query design.
United NationsAssesses your practical DBMS knowledge and query optimization techniques.
United NationsRank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.
WaymoUse ROW_NUMBER() to keep the earliest created_at 'Repl created' per entity and return out-of-order duplicates to delete.
Replit
QuantcastCompute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.
Gain Digital
TCS
Zest AIApproach for designing an end-to-end data pipeline from ingestion through transformation, storage, and downstream consumption.
United NationsDesign an end-to-end product recommendation system for a large e-commerce marketplace with strict latency and freshness needs.
United NationsDescribe how you executed an important project under tight resource constraints, balancing scope, risks, and stakeholder expectations.
United NationsEvaluates your system design skills for scalability, reliability, and performance.
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