?: What is GraphQL?
( )It is an algorithm in graph theory. ( )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 ( )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 ( )Queries, mutations and subscriptions
?: What is underfetching?
( )When you fetch too much data that are not even used. ( )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 ( )No
?: What does a ! indicate in GraphQL's SDL?
( )A value will be updated ( )A value is optional ( )A value can be deleted ( )A value is required
?: Select all the Scalar types native to GraphQL:
[ ]ID [ ]Float [ ]Date [ ]Boolean [ ]String [ ]Post
?: What GraphQL feature improves the structure and reusability of your code?
( )Aliases ( )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:
[ ]Zoos have many animals [ ]Location's address field is a Scalar type [ ]A zoo belongs to a Location [ ]Animal's age field is not required
?: Given the schema above, select the fields below that are required:
[ ]Zoo name [ ]Zoo location [ ]Location ID [ ]Animal age [ ]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 ( )Aliases
?: What major problems do aliases handle?
( )Aliases reduce overfetching. ( )Aliases reduce underfetching. ( )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.
( )True ( )False
?: In GraphQL, there is no such concept of default arguments.
( )True ( )False
?: What is a resolver function?
( )A function that a GraphQL client uses to resolve a query on the frontend ( )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