Test your GraphQL Subscriptions knowledge with a free interactive quiz — 19 questions with answers and explanations. No signup needed to play.
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How does authentication typically work for a GraphQL Subscription's WebSocket connection, given that WebSocket connections don't naturally carry the same headers as a standard HTTP request on every message?
Questions in this quiz
How does authentication typically work for a GraphQL Subscription's WebSocket connection, given that WebSocket connections don't naturally carry the same headers as a standard HTTP request on every message?
What is a GraphQL Subscription?
What is a common reason a team might choose NOT to use GraphQL Subscriptions for every piece of "could theoretically be realtime" data in their application?
How does a client subscribe to a GraphQL subscription using Apollo Client?
What transport does a GraphQL Subscription typically use, unlike a query or mutation?
What is a reasonable way to test a subscription resolver's behavior in an automated test, given that it involves an asynchronous, ongoing stream rather than a single return value?
What does a subscription resolver typically return, as distinct from a query resolver?
Why do most GraphQL clients (like Apollo Client) require a separate WebSocket-capable "link" configured specifically for subscription operations, distinct from the regular HTTP link used for queries/mutations?
What is a common reason a GraphQL Subscription implementation limits how long an idle/inactive WebSocket connection can remain open?
What is a "live query" and how does it conceptually differ from a GraphQL Subscription, even though both aim to keep client data up to date?
What does it mean that a subscription's resolver function is often split into a `subscribe` function and an optional `resolve` function?
What does it mean for a subscription to be "long-lived" from a server resource-management perspective, and why does this matter when deciding how many subscription types to support in a schema?