LLM APIs & Integration interview questions
Working with model APIs: streaming, function calling, rate limits, retries and backoff, and integrating an LLM cleanly into a real application.
21 questions21 free to practice
Free to practice
- Webhooks and Events: Why Handlers Must Be Idempotent
- Calling a Customer REST API Correctly
- MCP and Tool Servers in a Customer Deployment
- Webhook Events Arrive Out of Order and Duplicated
- Customer CRM Sync Silently Drops Records
- Auth — OAuth 2.0 Authorization Code + PKCE for a Third-Party Integration
- MCP — Tools vs Resources vs Prompts, and Choosing a Transport
- Auth — API Keys, Scopes, and Securing Machine-to-Machine Access
- MCP — Design a Model Context Protocol Server for an Internal Ticketing System
- Webhooks — Signature Verification and Replay Protection
- Webhooks — Design a Reliable Receiver (Idempotency, Ordering, Retries)
- Build a Health Check So the Customer Can Trust the Deployment
- Build a Tool to Triage Incoming Customer Feedback
- Build a Connector That Respects a Vendor Rate Limit
- Integration Drops Out Every Hour (Token Refresh)
- Flaky Vendor API Is Dropping and Duplicating Orders
- Restrict What the Agent Can Expose by Role
- Webhooks — Delivering Webhooks at Scale (Backoff, Dead-letter, Fan-out)
- MCP — Securing a Server: Auth, Scopes, and the Confused-Deputy Problem
- Design a Zero-Downtime Migration off a Legacy System
- Design an Agent for Field Use with No Reliable Internet
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