HTTP

Question 1

What is HTTP

Answer 1

HyperText Transfer Protocol

- exchanges information over the web

Question 2

components inside an HTTP REQUEST

Answer 2

• version
• verb/method
• URL
• headers
• body

Question 3

components inside an HTTP REPONSE

Answer 3

• version
• status code
• headers
• body

Question 4

Which HTTP verbs are safe?

Answer 4

GET

safe: doesn’t alter the state of the server

Question 5

Which HTTP verbs are idempotent?

Answer 5

GET, PUT, DELETE

idempotent: “non-repeatable”, sending multiple identical requests acts the same as sending just one

Question 6

levels of HTTP status code

100-500

Answer 6

100: informational
200: success
300: redirect
400: client error
500: server error

Question 7

What are the most important HTTP verbs & what do they do?

Answer 7

GET - retrieval
POST - create
PUT - update
DELETE - delete

Question 8

What do the following HTTP status codes mean?

• 200
• 201
• 403
• 404
• 500
• 503

Answer 8

200: OK
201: Created
403: Forbidden
404: Not Found
500: Internal Server Error
503: Service Unavailable