Questions
22 of 25
1How do you define a GraphQL mutation in NestJS and what input type conventions should you follow?
2How do you implement a DataLoader in NestJS and scope it correctly per request?
3How do you implement query complexity analysis to prevent expensive GraphQL queries in NestJS?
4How do you add authorization guards to GraphQL resolvers in NestJS?
5How do you pass arguments to a GraphQL query and validate them using @Args and input types in NestJS?
6What is a GraphQL subscription and how do you enable it in NestJS?
7How do you handle DataLoader cache invalidation and avoid serving stale data in NestJS?
8How do you test a NestJS GraphQL resolver with TestingModule?
9What is the difference between code-first and schema-first approaches in NestJS GraphQL?
10What are field resolvers in NestJS GraphQL and when do you use them instead of fetching all data in the root query?
11How do you filter subscription events so each client only receives events relevant to them in NestJS?
12How do you access the GraphQL context including the authenticated user inside a resolver in NestJS?
13How do you scale GraphQL subscriptions across multiple NestJS instances?
14How do you handle GraphQL errors and return partial results for mutations in NestJS?
15How do you define a GraphQL object type, enum, and union in code-first NestJS?
16How do you implement and use a custom GraphQL scalar type in NestJS?
17What is a resolver in NestJS GraphQL and how do you define a root query resolver?
18How do you implement cursor-based pagination in NestJS GraphQL using the Relay Connection spec?
19How do you bootstrap a NestJS GraphQL application in code-first mode?
20How do you implement schema stitching or federation for a micro-frontend GraphQL architecture in NestJS?
21What is the difference between @ObjectType() and @InputType() in NestJS GraphQL and why can't you reuse the same class for both?
22What is the N+1 problem in GraphQL and how does DataLoader solve it?
23How do you implement a subscription using PubSub in NestJS GraphQL?
24How does NestJS schema-first approach differ in setup and when would you choose it over code-first?
25How do you make a DataLoader available in the GraphQL context so every resolver can access it in NestJS?
