Server Side, REST & graphQL

Question 1

HTTP Header Query Methods:

Answer 1

GET

Question 2

HTTP Header Mutation Methods:

Answer 2

POST, PUT, PATCH, DELETE

Question 3

Status codes 1xx, 2xx, 3xx, 4xx, 5xx types

Answer 3

1xx: Informational
2xx: Success
3xx: Redirection
4xx: Client Error
5xx: Server Error

Question 4

REST stands for:

Answer 4

REpresentational State Transfer

Question 5

Status code meanings:

200, 201

Answer 5

200: Everything went well
201: A resource was created properly
(probably from a PUSH request)

Question 6

Status code meanings:

307

Answer 6

This resource has moved temporarily

Question 7

Status code meanings:

404, 500

Answer 7

404: You requested a nonexistent resource
500: Something went wrong server side (general error)

Question 8

RESTful heuristics tips: (verbs/plurals)?

Answer 8

Don’t use verbs in the restful url, use the correct HTTP method instead
Use plurals for collections, followed by an :id for the specific item
All lowercase
Don’t use spaces or underscores. Use hyphens
No file extensions

Question 9

REST disadvantages

Answer 9

Can be a lot of endpoints
Can ‘over-fetch’ whole objects when you only need a small part
Need to know what the end user will request, so you can design the end points

Question 10

REST advantages

Answer 10

Very familiar standard structure

Question 11

import and initialize express server

Answer 11

const express = require(“express”);

const setupServer = () => {
  const app = express();
  app.get("/api/pokemon", (req, res) => {

res.send(pokeData);   });

return app;
};

Question 12

graphQL benefits

Answer 12

prevents overfetching and underfetching

is kind of ‘self documenting’

Question 13

types of graphQl operations

Answer 13

queries (asks for data. Let GET)

mutations (alters data, like POST, PUT, PATCH, DELETE)

Question 14

Two parts of graphQL server:

Answer 14

schema

resolver

Question 15

graphQl schema and resolver example (for orders)

Answer 15

Schema:
type Query {
order (id: Int): Order
}

Resolver:
order (params) => {

return order
}

Question 16

GraphQL data types

Answer 16

Int: A signed 32‐bit integer.
Float: A signed double-precision floating-point value.
String: A UTF‐8 character sequence.
Boolean: true or false.
ID: often used to refetch an object or as the key for a cache

Question 17

graphQL non null (eg: a string)

Answer 17

String!

Question 18

graphQL array of types (eg: Int)

Answer 18

[Int]

Question 19

CRUD = ?

Answer 19

Create, Read, Update, Delete