Pluralsight: GraphQL: The Big Picture 2019

Question 1

02 What is GraphQL / 03 What is GraphQL?

What is GraphQL?

Answer 1

GraphQL is a query language for your API.

Question 2

02 What is GraphQL / 05 Rest vs. GraphQL

Compare GraphQL and REST.

Answer 2

1. Multiple round trips (REST) vs one single request (GraphQL).
2. Over fetching and under fetching (REST) vs tailor made queries (GraphQL).
3. No need to expose new API when UI refactor is needed.

Question 3

03 GraphQL Core Concepts / 01 Types

What are two main types in GraphQL?

Answer 3

1. Query
2. Mutation

Question 4

03 GraphQL Core Concepts / 04 Queries - Alias

What is an alias?

Answer 4

You can’t query for the same field with different arguments. Aliases let you rename the result of a field with anything you want.

Question 5

03 GraphQL Core Concepts / 05 Queries - Fragments

What are fragments?

Answer 5

Fragments are GraphQL’s reusable units. They let you build sets of fields and then include them in multiple queries.

Question 6

03 GraphQL Core Concepts / 07 Mutations

How query and mutation fields are executed?

Answer 6

Query fields are executed in parallel, mutation fields run in series, one after the other.

Question 7

05 GraphQL Ecosystem and Tooling / 02 GraphQL Client

What GraphQL Client can do? (6 items)

Answer 7

1. Communicate with server (sent requests and receive responses)
2. Integrate with view components and updates the UI
3. Cache query results
4. Handle errors and validate schema
5. Provide local state management
6. Provide pagination

Question 8

05 GraphQL Ecosystem and Tooling / 03 GraphQL Server

What are resolvers?

Answer 8

Resolver function is a function that resolves a value for a type/field in the GraphQL Schema.

Question 9

05 GraphQL Ecosystem and Tooling / 03 GraphQL Server

4 responsibilities of GraphQL Server

Answer 9

1. Schema and Resolver Functions
2. Network Layer
3. GraphQL Execution Engine
4. Batched Resolving