18 Tooling & Federation questions from the GraphQL bank, written for Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd.
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A.a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs
B.an architecture composing multiple independently owned subgraphs into one unified supergraph for clients
C.one service owning a slice of the federated schema that the gateway combines with others into the whole
D.the composition layer that plans and executes a client query across subgraphs and merges their partial results
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2. Which term means: "an architecture composing multiple independently owned subgraphs into one unified supergraph for clients"?
Junior
A.Schema registry
B.Apollo Client
C.Federation
D.Entity
Answer + AI explanation with Pro
3. Which statement is correct?
Junior
A.Federation — a popular client library providing a normalized cache, hooks and declarative data fetching for front-end apps
B.Federation — one service owning a slice of the federated schema that the gateway combines with others into the whole
C.Federation — a service storing schema versions and running composition and breaking-change checks in CI before publishing
D.Federation — an architecture composing multiple independently owned subgraphs into one unified supergraph for clients
Answer + AI explanation with Pro
4. What is Subgraph?
Mid
A.an architecture composing multiple independently owned subgraphs into one unified supergraph for clients
B.a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs
C.the composition layer that plans and executes a client query across subgraphs and merges their partial results
D.one service owning a slice of the federated schema that the gateway combines with others into the whole
Answer + AI explanation with Pro
5. Which term means: "one service owning a slice of the federated schema that the gateway combines with others into the whole"?
Mid
A.Subgraph
B.Apollo Client
C.Gateway
D.Entity
Answer + AI explanation with Pro
6. Which statement is correct?
Mid
A.Subgraph — a popular client library providing a normalized cache, hooks and declarative data fetching for front-end apps
B.Subgraph — an architecture composing multiple independently owned subgraphs into one unified supergraph for clients
C.Subgraph — one service owning a slice of the federated schema that the gateway combines with others into the whole
D.Subgraph — a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs
Answer + AI explanation with Pro
7. What is Gateway?
Mid
A.an architecture composing multiple independently owned subgraphs into one unified supergraph for clients
B.a popular client library providing a normalized cache, hooks and declarative data fetching for front-end apps
C.the composition layer that plans and executes a client query across subgraphs and merges their partial results
D.a service storing schema versions and running composition and breaking-change checks in CI before publishing
Answer + AI explanation with Pro
8. Which term means: "the composition layer that plans and executes a client query across subgraphs and merges their partial results"?
Mid
A.Apollo Client
B.Gateway
C.Entity
D.Subgraph
Answer + AI explanation with Pro
9. Which statement is correct?
Mid
A.Gateway — one service owning a slice of the federated schema that the gateway combines with others into the whole
B.Gateway — the composition layer that plans and executes a client query across subgraphs and merges their partial results
C.Gateway — a service storing schema versions and running composition and breaking-change checks in CI before publishing
D.Gateway — a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs
Answer + AI explanation with Pro
10. What is Entity?
Mid
A.one service owning a slice of the federated schema that the gateway combines with others into the whole
B.a popular client library providing a normalized cache, hooks and declarative data fetching for front-end apps
C.a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs
D.the composition layer that plans and executes a client query across subgraphs and merges their partial results
Answer + AI explanation with Pro
11. Which term means: "a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs"?
Mid
A.Entity
B.Gateway
C.Federation
D.Apollo Client
Answer + AI explanation with Pro
12. Which statement is correct?
Mid
A.Entity — a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs
B.Entity — the composition layer that plans and executes a client query across subgraphs and merges their partial results
C.Entity — an architecture composing multiple independently owned subgraphs into one unified supergraph for clients
D.Entity — a popular client library providing a normalized cache, hooks and declarative data fetching for front-end apps
Answer + AI explanation with Pro
13. What is Apollo Client?
Junior
A.a popular client library providing a normalized cache, hooks and declarative data fetching for front-end apps
B.the composition layer that plans and executes a client query across subgraphs and merges their partial results
C.a service storing schema versions and running composition and breaking-change checks in CI before publishing
D.one service owning a slice of the federated schema that the gateway combines with others into the whole
Answer + AI explanation with Pro
14. Which term means: "a popular client library providing a normalized cache, hooks and declarative data fetching for front-end apps"?
Junior
A.Subgraph
B.Schema registry
C.Apollo Client
D.Entity
Answer + AI explanation with Pro
15. Which statement is correct?
Junior
A.Apollo Client — a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs
B.Apollo Client — an architecture composing multiple independently owned subgraphs into one unified supergraph for clients
C.Apollo Client — the composition layer that plans and executes a client query across subgraphs and merges their partial results
D.Apollo Client — a popular client library providing a normalized cache, hooks and declarative data fetching for front-end apps
Answer + AI explanation with Pro
16. What is Schema registry?
Senior
A.an architecture composing multiple independently owned subgraphs into one unified supergraph for clients
B.a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs
C.a popular client library providing a normalized cache, hooks and declarative data fetching for front-end apps
D.a service storing schema versions and running composition and breaking-change checks in CI before publishing
Answer + AI explanation with Pro
17. Which term means: "a service storing schema versions and running composition and breaking-change checks in CI before publishing"?
Senior
A.Schema registry
B.Subgraph
C.Gateway
D.Apollo Client
Answer + AI explanation with Pro
18. Which statement is correct?
Senior
A.Schema registry — one service owning a slice of the federated schema that the gateway combines with others into the whole
B.Schema registry — a service storing schema versions and running composition and breaking-change checks in CI before publishing
C.Schema registry — the composition layer that plans and executes a client query across subgraphs and merges their partial results
D.Schema registry — a federated object type, identified by a @key, that can be referenced and extended across multiple subgraphs
Answer + AI explanation with Pro
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