database access Interview Questions
The most frequently asked database access questions across all roles and companies, ranked by real interview frequency. Updated daily.
Design a Google Sheets-like backend with concurrent editing, durable storage, snapshots, and scalable save/load paths.
SalesforceDesign BookMyShow as an object-oriented system, defining entities, interfaces, methods, and database choices.
MyntraCCornerstone OnDemand
ClearTaxDesign CI/CD, database configuration, infrastructure automation, and deployment for a production service.
AppleDesign relational tables and SQL to identify premium credit card customers from customer, account, card, and transaction data.
McKinsey &Explain MongoDB's database type and the tradeoffs behind choosing it for a data ingestion pipeline.
AppleStructure a backtracking solution similar to N-Queens and validate its results with SQL where appropriate.
RokuExplain how to choose database architectures for high-volume ML data, serving, and feedback workloads.
QXODesign an IR and ranking system that recommends high-protein foods, including preprocessing, storage, serving, and restaurant-menu adaptation.
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Use ROW_NUMBER and a user join to find the three highest completed AARP Rewards purchases per user category.
AARP
Insight Global
SonyBuild an efficient PostgreSQL report that aggregates partitioned project events and costs without join multiplication.
McKinsey &Optimize a PostgreSQL query with multiple joins and aggregations over large tables while preserving correct filtered totals.
Google