GraphQL

Can you have multiple queries in a single GraphQL request?

Explain middleware in the context of GraphQL.

Explain the difference between a GraphQL query and a resolver function.

Explain the main differences between REST and GraphQL?

How are errors handled in GraphQL?

How do you handle file uploads in GraphQL?

How do you implement a GraphQL client and server?

How do you implement authentication and authorization in GraphQL?

How do you implement custom error handling in GraphQL?

How does GraphQL handle over-fetching and under-fetching of data compared to REST?

What are GraphQL fragments?

What is a GraphQL resolver?

What is a GraphQL subscription?

What is introspection in GraphQL, and how is it useful?

What is the difference between GraphQL subscriptions and WebSocket communication?

What is the difference between Relay and Apollo in the context of GraphQL?

What is the query execution engine?

Discuss federated schemas and microservices architecture in GraphQL.

Explain GraphQL directives.

Explain the concept of batching and dataloading in GraphQL.

How do you address the "N+1 query" problem in GraphQL?

How do you handle long-running queries or mutations in GraphQL?

How do you handle pagination in GraphQL?

How do you handle schema stitching with Apollo Server?

How do you handle versioning and backward compatibility in GraphQL?

Name security concerns in GraphQL and ways to resolve them?

Name some common GraphQL caching strategies.