10 November 2020

#GraphQL

#GraphQL

Key Concepts


Topic SubTopic Basic ✅ Intermediate ✅ Advanced ✅ Expert ✅
Introduction What is GraphQL, Features, Benefits, Use cases ✅ ✅ ✅ ✅
GraphQL vs REST Differences, Advantages, Limitations, When to use ✅ ✅ ✅ ✅
Queries Basics, Nested queries, Arguments, Aliases ✅ ✅ ✅ ✅
Mutations Create, Update, Delete operations, Input types ✅ ✅ ✅ ✅
Subscriptions Real-time updates, WebSockets, Implementation ✅ ✅ ✅
Schema Types, Fields, Query type, Mutation type, Subscription type ✅ ✅ ✅ ✅
Types Scalar types, Object types, Enum, Interface, Union ✅ ✅ ✅ ✅
Resolvers Resolver functions, Arguments, Context, Parent object ✅ ✅ ✅ ✅
Variables Input variables, Default values, Variable types ✅ ✅ ✅ ✅
Directives @include, @skip, @deprecated, Custom directives ✅ ✅ ✅ ✅
Error Handling GraphQL errors, Error codes, Custom errors ✅ ✅ ✅
Authentication & Authorization JWT, OAuth, Role-based access, Field-level security ✅ ✅ ✅
Performance Optimization Query batching, Caching, DataLoader, Complexity analysis ✅ ✅
Tooling & Ecosystem Apollo, Relay, GraphiQL, GraphQL Playground ✅ ✅ ✅ ✅
Best Practices Schema design, Versioning, Pagination, Security ✅ ✅ ✅ ✅

Interview question

Basic

  1. What is GraphQL?
  2. Who developed GraphQL?
  3. What are the main benefits of GraphQL over REST?
  4. What is a GraphQL schema?
  5. What are queries in GraphQL?
  6. What are mutations in GraphQL?
  7. What are subscriptions in GraphQL?
  8. What is a resolver in GraphQL?
  9. What is the difference between query and mutation?
  10. What are GraphQL types?
  11. What are scalar types in GraphQL?
  12. What are enums in GraphQL?
  13. What are lists in GraphQL?
  14. What are non-null types in GraphQL?
  15. What is introspection in GraphQL?
  16. What is a fragment in GraphQL?
  17. What are directives in GraphQL?
  18. What is the default HTTP method for GraphQL requests?
  19. How is GraphQL strongly typed?
  20. What is the difference between GraphQL and SQL?
  21. Can GraphQL work without a database?
  22. What is the role of __typename in GraphQL?
  23. What is batching in GraphQL?
  24. What is the purpose of GraphQL variables?
  25. What are the limitations of GraphQL?

Intermediate

  1. What is the role of GraphQL schema definition language (SDL)?
  2. How do you define custom scalar types in GraphQL?
  3. Explain input types in GraphQL.
  4. What are unions in GraphQL?
  5. What are interfaces in GraphQL?
  6. How do you validate GraphQL queries?
  7. How does GraphQL handle versioning?
  8. What are the best practices for naming in GraphQL schema?
  9. What is query complexity analysis?
  10. How does GraphQL handle over-fetching and under-fetching?
  11. What are nested resolvers?
  12. What is the N+1 problem in GraphQL?
  13. How can you solve the N+1 problem in GraphQL?
  14. What is DataLoader in GraphQL?
  15. How does GraphQL handle error reporting?
  16. What are partial responses in GraphQL?
  17. How does GraphQL differ from gRPC?
  18. How do you use variables with fragments in GraphQL?
  19. How does caching work in GraphQL?
  20. What is persisted queries in GraphQL?
  21. What is GraphQL Playground?
  22. What is Apollo Server?
  23. What is Relay in GraphQL?
  24. How do GraphQL subscriptions work with WebSockets?
  25. What are the security concerns in GraphQL?

Advanced

  1. What are GraphQL Federation and schema stitching?
  2. What is Apollo Federation?
  3. What is the difference between schema stitching and federation?
  4. What is GraphQL Gateway?
  5. How do you implement authentication in GraphQL?
  6. How do you implement authorization in GraphQL?
  7. What are GraphQL directives and how do you create custom ones?
  8. How do you handle file uploads in GraphQL?
  9. What is GraphQL mesh?
  10. What are GraphQL unions vs interfaces?
  11. How do you implement batching in GraphQL resolvers?
  12. What are best practices for designing GraphQL mutations?
  13. How do you handle pagination in GraphQL?
  14. What are Relay-style pagination and connections?
  15. How do you handle rate limiting in GraphQL APIs?
  16. What is query depth limiting in GraphQL?
  17. How does GraphQL handle subscriptions at scale?
  18. How does GraphQL integrate with microservices?
  19. How do you monitor GraphQL performance?
  20. How do you trace GraphQL queries in production?
  21. What is schema federation in Apollo?
  22. What are schema delegation techniques in GraphQL?
  23. How do you modularize large GraphQL schemas?
  24. What is GraphQL schema stitching middleware?
  25. What are GraphQL schema directives for logging and tracing?

Expert

  1. How do you secure GraphQL APIs against DoS attacks?
  2. What is query cost analysis in GraphQL?
  3. How do you handle caching in GraphQL at scale?
  4. How do you integrate GraphQL with REST APIs?
  5. How do you integrate GraphQL with gRPC?
  6. How do you optimize GraphQL queries in production?
  7. What are advanced DataLoader patterns?
  8. How do you implement GraphQL schema federation in microservices architecture?
  9. How do you version GraphQL schemas in large organizations?
  10. How does GraphQL fit into Event-Driven Architectures (EDA)?
  11. How do you monitor and log GraphQL errors?
  12. How do you integrate GraphQL with Kafka?
  13. How do you handle real-time updates in GraphQL at scale?
  14. What is Apollo Gateway architecture?
  15. How do you build resilient GraphQL APIs?
  16. What are GraphQL SDL limitations and solutions?
  17. How do you implement GraphQL authorization at field level?
  18. How do you manage breaking changes in GraphQL APIs?
  19. What are GraphQL best practices for microfrontends?
  20. How do you design GraphQL APIs for large-scale enterprise systems?
  21. What is GraphQL-over-HTTP vs GraphQL-over-WebSockets?
  22. How do you handle federation across multiple teams in GraphQL?
  23. What are common GraphQL anti-patterns?
  24. What is the future of GraphQL in API design?
  25. Compare GraphQL, REST, gRPC, and OData for enterprise use cases.

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