1. How do you implement global error handling?
Moderate
Global error handling through error link, onError callback. Implement centralized error processing, logging. Features: error transformation, retry logic. Handle application-wide errors.
2. What is error tracking and monitoring?
Advanced
Error tracking through logging services, monitoring tools. Implement error reporting, analytics collection. Features: error patterns, performance impact. Monitor application health.
3. How do you implement retry logic?
Moderate
Retry logic through retry link, attempt configuration. Implement exponential backoff, max attempts. Features: retry conditions, timeout handling. Manage operation retries.
4. What are error boundaries in React Apollo?
Moderate
Error boundaries catch rendering errors, provide fallback UI. Implement component-level error handling. Features: error isolation, recovery options. Prevent application crashes.
5. How do you implement error logging?
Moderate
Error logging through centralized service, structured formats. Implement error categorization, context capture. Features: log aggregation, analysis tools. Track application errors.
6. What are error recovery strategies?
Advanced
Recovery strategies through fallback options, state reset. Implement data recovery, cache updates. Features: graceful degradation, user feedback. Handle error recovery.
7. What are different types of errors in Apollo GraphQL?
Basic
Error types include: Network errors, GraphQL errors, Runtime errors. Network errors for connection issues, GraphQL errors for operation failures, Runtime errors for execution problems. Each requires specific handling strategies.
8. How do you handle network errors?
Moderate
Network error handling through retry logic, fallback strategies. Implement timeout handling, offline detection. Features: connection recovery, user feedback. Manage connectivity issues.
9. What is error UI implementation?
Basic
Error UI through error boundaries, component feedback. Display error messages, recovery options. Features: user communication, action guidance. Improve error experience.
10. How do you handle subscription errors?
Advanced
Subscription error handling through connection monitoring, error callbacks. Handle WebSocket errors, connection failures. Features: reconnection logic, state recovery. Manage subscription issues.
11. What are error policies in Apollo Client?
Moderate
Error policies control how errors affect result data. Options: none, all, ignore. Determine partial data handling, error inclusion. Configure per-operation behavior.
12. How do you implement mutation error handling?
Moderate
Mutation error handling through try-catch blocks, error callbacks. Handle operation failures, optimistic updates. Features: rollback logic, error recovery. Manage mutation failures.
13. What are error links in Apollo Client?
Advanced
Error links provide custom error handling middleware. Intercept and process errors, modify error behavior. Features: error transformation, retry logic. Extend error handling capabilities.
14. What are error transformations?
Advanced
Error transformations through custom error processing, formatting. Modify error structure, add context. Features: error normalization, message formatting. Standardize error handling.
15. How do you handle partial errors?
Advanced
Partial error handling through error policies, data extraction. Process partial responses, handle missing data. Features: graceful degradation, fallback content. Manage incomplete results.
