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API interaction Interview Questions

The most frequently asked API interaction questions across all roles and companies, ranked by real interview frequency. Updated daily.

30questions
~4htotal time
25companies covered
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1
System DesignStart here. 16 questions · ~131 min
Design a Grounded API AgentHard

Design an API-calling agent that stays grounded in tool outputs and limits hallucinations during multi-step execution.

Hallucinationfactual groundingAPI interactionInfosysRed VenturesEma
Scheduler API DesignHard

Design a Scheduler API that creates timers and reliably fires callbacks at scale with low latency.

latencydistributed systemsAPI interactionAmazon Web Services
HTTP Methods BasicsEasy

Explain the standard HTTP methods, their semantics, safety, idempotency, and common API usage.

backend integrationindustry standardsAPI interactionGoogle
HTTP Status Codes OverviewEasy

Explain the five HTTP status-code classes and give representative codes and their meanings.

industry standardsapi gatewayAPI interactionGoogle
Resilient Third-Party API IntegrationHard

Design a resilient integration for a third-party ML API within an existing production stack.

api integrationapi gatewayarchitectureQXO
Describe How Agents Gain CapabilitiesMedium

Explain how agents acquire, select, authorize, and safely execute capabilities through tools, APIs, and feedback loops.

agent workflowsagent designAPI interactionAmex
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2
Coding11 questions · ~90 min
String Manipulation and API InteractionMedium

Assesses your ability to combine parsing, transformation, and external API logic correctly.

string manipulationAPI interactionRAMP Consulting Group
React Component with Mock APIHard

Evaluates your React skills for async data fetching and robust UI state handling.

error handlingreactAPI interactionSwiggy
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3
More topics3 questions · ~25 min
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