GraphQL

Question 1

Define GraphQL.

Answer 1

A query language for APIs that allows clients to request specific data.

Question 2

True or false: GraphQL uses a fixed structure for responses.

Answer 2

FALSE

The structure of responses in GraphQL is flexible and depends on the query.

Question 3

What does schema define in GraphQL?

Answer 3

It defines the types, queries, and mutations available in the API.

Question 4

Fill in the blank: Resolvers are functions that resolve _______ in GraphQL.

Answer 4

data

Question 5

What is a mutation in GraphQL?

Answer 5

A type of operation that modifies server-side data.

Question 6

Define query in the context of GraphQL.

Answer 6

A request for data from the server.

Question 7

True or false: GraphQL can only fetch data, not modify it.

Answer 7

FALSE

GraphQL supports both fetching and modifying data through queries and mutations.

Question 8

What is introspection in GraphQL?

Answer 8

A feature that allows clients to query the schema for its types and fields.

Question 9

Fill in the blank: Fragments in GraphQL are used to share _______ across queries.

Answer 9

fields

Question 10

What is the purpose of variables in GraphQL queries?

Answer 10

To allow dynamic input values in queries.

Question 11

Define subscription in GraphQL.

Answer 11

A way to receive real-time updates from the server.

Question 12

True or false: GraphQL supports versioning of APIs.

Answer 12

FALSE

GraphQL encourages a single evolving version rather than multiple versions.

Question 13

What is a type in GraphQL?

Answer 13

A definition of a data structure in the schema.

Question 14

Fill in the blank: Enums in GraphQL are used to define a set of _______.

Answer 14

allowed values

Question 15

What is the role of directives in GraphQL?

Answer 15

To modify the behavior of queries and fields.

Question 16

Define Apollo Client.

Answer 16

A popular library for managing GraphQL data in client applications.

Question 17

True or false: GraphQL is primarily used with REST APIs.

Answer 17

FALSE

GraphQL is an alternative to REST APIs, not primarily used with them.

Question 18

What does N+1 problem refer to in GraphQL?

Answer 18

A performance issue where multiple database queries are made unnecessarily.

Question 19

Fill in the blank: Batching in GraphQL helps to reduce _______ calls.

Answer 19

network

Question 20

What is schema stitching in GraphQL?

Answer 20

A technique to combine multiple GraphQL schemas into one.