Client Setup & Configuration Interview Questions
Comprehensive client setup & configuration interview questions and answers for Apollo GraphQL. Prepare for your next job interview with expert guidance.
Questions Overview
1. How do you initialize Apollo Client?
Basic2. What are the essential Apollo Client options?
Basic3. How do you configure cache settings?
Moderate4. What is Apollo Link and its configuration?
Moderate5. How do you set up authentication?
Moderate6. What is local state configuration?
Advanced7. How do you configure error handling?
Moderate8. What are fetch policies and their configuration?
Moderate9. How do you set up subscriptions?
Advanced10. What is persisted queries configuration?
Advanced11. How do you configure development tools?
Basic12. What are type policies configuration?
Advanced13. How do you set up testing environment?
Moderate14. What is fragment matching configuration?
Advanced15. How do you configure batch operations?
Moderate1. How do you initialize Apollo Client?
BasicInitialize through ApolloClient constructor, configuration options. Set up cache, link configuration. Features: network interface, cache setup. Essential for client creation.
2. What are the essential Apollo Client options?
BasicEssential options include: uri for GraphQL endpoint, cache implementation, default options. Configure link chain, error handling. Features: request policies, connection settings.
3. How do you configure cache settings?
ModerateCache configuration through InMemoryCache options, type policies. Set up field policies, cache behavior. Features: normalization settings, custom identifiers.
4. What is Apollo Link and its configuration?
ModerateApollo Link configures request pipeline, middleware chain. Set up network handling, error processing. Features: request modification, response handling.
5. How do you set up authentication?
ModerateAuthentication setup through context, headers configuration. Implement token management, auth middleware. Features: request authorization, session handling.
6. What is local state configuration?
AdvancedLocal state through cache configuration, local resolvers. Set up client-side fields, local mutations. Features: local data management, cache integration.
7. How do you configure error handling?
ModerateError handling through onError link, global handlers. Set up error policies, retry logic. Features: error transformation, recovery strategies.
8. What are fetch policies and their configuration?
ModerateFetch policies control cache/network behavior. Configure default policies, per-query settings. Features: cache usage, network requests.
9. How do you set up subscriptions?
AdvancedSubscription setup through WebSocket link, protocol configuration. Configure connection parameters, client options. Features: real-time updates, connection management.
10. What is persisted queries configuration?
AdvancedPersisted queries through automatic persisting, cache configuration. Set up query registry, automatic extraction. Features: query optimization, network efficiency.
11. How do you configure development tools?
BasicDevelopment tools through Apollo DevTools integration, debugging options. Set up logging, inspection tools. Features: cache inspection, query debugging.
12. What are type policies configuration?
AdvancedType policies through cache configuration, field definitions. Set up custom field behavior, merge functions. Features: cache normalization, field computing.
13. How do you set up testing environment?
ModerateTesting setup through MockedProvider, test utilities. Configure mock responses, network behavior. Features: query testing, mutation verification.
14. What is fragment matching configuration?
AdvancedFragment matching through IntrospectionFragmentMatcher, type configuration. Set up union types, interface handling. Features: type resolution, fragment support.
15. How do you configure batch operations?
ModerateBatch operations through Apollo Link Batch, queue configuration. Set up request batching, timing options. Features: request optimization, network efficiency.