01_AppNetworks

Question 1

What are the 3 API layers of an API-led connectivity approach?

Answer 1

System - Process - Experience

Question 2

What is the backend API layer called?

Answer 2

System APIs

Question 3

What is the front end API layer called?

Answer 3

Experience APIs

Question 4

What is the middle layer API called?

Answer 4

Process APIs

Question 5

C4E stands for?

Answer 5

Center for Enablement

Question 6

What is a Center for Enablement?

Answer 6

It is a cross functional team that ensures assets are productized and pubished, consumable and fully leveraged.

Question 7

How is C4E success measured?

Answer 7

On asset consumption.

Question 8

An API could be referring to what 3 things?

Answer 8

API interface definition file (API spec). Web service (actual implementation you make calls to or the interface of that implementation). An API proxy (an application that contols acces to a web service, restrictign access and use through the use of an API gateway).

Question 9

What is an API?

Answer 9

Provides info for how to communicate with a software component (defines Operations, inputs, outputs and underlying data types). It defines functionalities independent of implementations (you can change what’s going on behind the scenes without changing how people call it).

Question 10

What is a web service?

Answer 10

A method of communication that allows two software systems to exchange data over the internet.

Question 11

What are the 2 types of web service?

Answer 11

SOAP and REST.

Question 12

How are the communication rules defined for a SOAP web service?

Answer 12

XML based WSDL (Web Services Description Language) f

Question 13

REST stands for?

Answer 13

Representational State Transfer (uses standard HTTP protocol)

Question 14

What are the HTTP methods?

Answer 14

Get/Put/Post/Delete/Patch

Question 15

What does the PUT method do?

Answer 15

replaces a resource completely

Question 16

What does a PATCH method do?

Answer 16

partially updates a resource

Question 17

What is an API portal?

Answer 17

A place for developers to discover all the tools that they need to successfully use the API. Could include documentation, tutorials, registration to use the API, provide feedback and make requests and also test the API.

Question 18

What is the difference between Unsecured APIs and Secured APIs?

Answer 18

Unsecured may be public and require no authentication, whilst Secured APIs are secured and require authentication such as credentials/tokens. Often a proxy is created to govern access to an API. Other protocols can be used to secure APIs (OAuth, SAML, JWT, … )

Question 19

What do REST web services return?

Answer 19

response and status code

Question 20

Status code 200?

Answer 20

OK - the request succeeded

Question 21

Status code 201?

Answer 21

Created - a new resource or object in a collection

Question 22

Status code 400?

Answer 22

Bad request - The request could not be performed by the server due to bad syntax or other reason in the request.

Question 23

Status code 401?

Answer 23

Unauthorized - Auth credentials are required or user does not have access to the resource/method that they are requesting.

Question 24

Status code 404?

Answer 24

Resource not found = URI is not recognized by the server.

Question 25

Status code 500?

Answer 25

Server error - generic something went wrong with the server side.

Question 26

What is an application network?

Answer 26

A network of applications, data and devices connected with APIs to make them plugable and to create reusable services

Question 27

What is a web service?

Answer 27

A method of communication that allows two software sustems to exchange data over the internet