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Top 50 APIs Interview Questions

The most frequently asked APIs questions across all roles and companies, ranked by real interview frequency. Updated weekly.

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Handle Unstable Source Schemas
Hard

Design a pipeline that keeps loading data when source APIs change shape or break fields.

APIsDependenciesQuality
Recently asked
RabobankFifth Third BankFirst Trust Capital Management
Legacy Database to Observability Platform
Medium

Explain how to connect a legacy on premises database to a cloud observability platform, including API protocol and security choices.

data integrationAPIsobservability
Recently asked
NiCEAirbus HelicoptersPurdue University
Integrate New Model API Fast
Medium

Add a newly released ML model API into an existing pipeline quickly, while handling schema changes, retries, and data quality checks.

data pipelineAPIsintegration
Recently asked
Palantir technologies
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Design API Rate Limiter
Hard

Explain a queue-based, stateful rate limiter for concurrent workers calling third-party APIs safely and efficiently.

APIsabstractionrate limiting
Recently asked
DatabricksSharpen TechnologiesGridware
React Typewriter with Fetched Text
Easy

Implement a React typewriter component that fetches text, reveals it character by character, and supports start, pause, resume, and reset controls.

APIsjavascriptFrameworks
Recently asked
RampRAMP Consulting Group
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Aligning Cross-Team API Contracts
Easy

Tests cross-team collaboration and influence without authority when aligning APIs, protocols, and ownership for a shared service.

APIsStakeholder Managementcollaboration
AlphaSenseGroupe ALLIANCE
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