Context

API integration is a core part of mobile engineering because most apps depend on remote services for authentication, content, payments, and synchronization. Interviewers use this topic to evaluate whether you understand both client-side implementation details and system-level trade-offs.

Core Question

Describe your experience with integrating APIs in mobile applications. In your answer, explain:

1. how a mobile app sends requests, parses responses, and updates UI state,
2. how you handle failures such as timeouts, retries, rate limits, and offline mode,
3. how you approach authentication, security, caching, and versioning.

Scope Guidance

The interviewer is not looking for a personal story alone. They expect a structured technical explanation of the request lifecycle, common implementation patterns, and practical trade-offs. You should be able to discuss both the happy path and failure cases, and mention how you would design the integration to be reliable, maintainable, and responsive on a resource-constrained client.