???

?: What is GraphQL?

( )It is an algorithm in graph theory. (X)GraphQL is the technology for building APIs. ( )GraphQL is a communication protocol. ( )GraphQL is a cognitive architecture.

?: What does SDL stand for in GraphQL?

( )Structured Data Language ( )Syntactic Definition Language (X)Schema Definition Language ( )Syntactic Data Language

?: What operations can we execute on the GraphQL server?

( )Queries, aliases and directives ( )Only queries and mutations ( )Directives and fragments (X)Queries, mutations and subscriptions

?: What is underfetching?

( )When you fetch too much data that are not even used. (X)When we do not have enough data in the first request, so we need to call additional requests to obtain all needed data. ( )When we use the special library called "unfetch". ( )An optimization technique for GraphQL mutations.

?: Is GraphQL only for React developers?

( )Yes (X)No

?: What does a ! indicate in GraphQL's SDL?

( )A value will be updated ( )A value is optional ( )A value can be deleted (X)A value is required

?: Select all the Scalar types native to GraphQL:

[X]ID [X]Float [ ]Date [X]Boolean [X]String [ ]Post

?: What GraphQL feature improves the structure and reusability of your code?

( )Aliases (X)Fragments ( )Refactoring ( )Queries

?: Given this schema:

type Animal {
  id: ID!
  age: Float
  alive: Boolean
  breed: String
  zoo: Zoo
}
type Location {
  id: ID!
  address: String!
  city: String!
  state: String!
  zoos: [Zoo]!
}
type Zoo {
  id: ID!
  animals: [Animal]
  location: Location!
  name: String
}

Select all that are true:

[X]Zoos have many animals [X]Location's address field is a Scalar type [X]A zoo belongs to a Location [X]Animal's age field is not required

?: Given the schema above, select the fields below that are required:

[ ]Zoo name [X]Zoo location [X]Location ID [ ]Animal age [X]Location state

?: Let's say we want to query for 2 specific Animals, like so:

{
  Animal(id: 8) {
    age
    breed
  }
  Animal(id: 14) {
    age
    breed
  }
}

This would be invalid because GraphQL cannot resolve two identically named queries. What feature could we use to solve this issue?

( )Fragments ( )Arguments (X)Aliases

?: What major problems do aliases handle?

( )Aliases reduce overfetching. ( )Aliases reduce underfetching. (X)Aliases allow us to call the same query with different variables in a single GraphQL request. ( )Aliases are special type of custom scalars which name fields differently based on received data.

?: In GraphQL type definitions, each field can take zero or more arguments.

(X)True ( )False

?: In GraphQL, there is no such concept of default arguments.

( )True (X)False

?: What is a resolver function?

( )A function that a GraphQL client uses to resolve a query on the frontend (X)A function on a GraphQL server that's responsible for fetching the data for a single field ( )A function that solves all your problems ( )It's a synonym for serverless functions

???