Book 4 - ServerSide

Question 1

What is a controller?

Answer 1

a controller is a class. A controller class contains methods that are the handlers for the endpoints of the API. Controllers inherit many of their properties and methods from the ControllerBase class. A controller contains all of the endpoints for a specific resource.

Question 2

what does decorated mean?

Answer 2

decorated is when a specific annotation or attribute is applied to a class, method, property or field to provide additional information or behavior.

Question 3

[Route(“api/[controller]”)]

Answer 3

Route attribute, tells the framework what route segment should be associated with all of the endpoints in the controller.

Question 4

[ApiController]

Answer 4

attribute for controllers

Question 5

What is ControllerBase

Answer 5

parent class for the controllers

Question 6

What is Authentication?

Answer 6

proving you are you who say you are

Question 7

What is Authorization?

Answer 7

proving you are allowed to do what you are trying to do

Question 8

What is a cookie?

Answer 8

A small piece of data that a web server sends to a web browser, which the browser then stores locally. They are used to track user activity, maintain user sessions, store user preferences, and perform other tasks related to user interaction with a website or web application.

Question 9

What is in a cookie?

Answer 9

it is possible to configure lots of data in a cookie… each piece is called a claim

Question 10

IdentityDbContext

Answer 10

class inherited from EF Core

Question 11

IdentityUser

Answer 11

part of IdentityDbContext - this will hold login credentials for users

Question 12

IdentityRole

Answer 12

part of IdentityDbContext - this will hold the various roles that a user can have

Question 13

IdentityUserRole

Answer 13

part of IdentityDbContext - a many-to-many table between roles and users. These define which users have which roles.

Question 14

what is a Guid

Answer 14

Global Unique Identifier. These can be created with Guid.NewGuid()..a Guid is a data type … used for uniquely identified resources

Question 15

what does hashing a password mean ?

Answer 15

hashing the password has to do with obscuring the password for security reasons.

Question 16

what is hashing?

Answer 16

hashing is converting data of arbitrary size to a fixed size value… through a mathematical algorithm called a hash function.

Question 17

[Authorize]

Answer 17

attribute that tells the framework to require a cookie to access the resource

Question 18

[Authorize(Roles = “Admin”)]

Answer 18

attribute that ensures that the resource will only be accessible to authenticated users that have the admin role associated with their user id

Question 19

what does decoupling mean?

Answer 19

reducing or eliminating dependencies between components … or promotes independence and modularity between components, elements, modules etc. … in short reduces dependencies

Question 20

what is dependency injection ?

Answer 20

a design pattern in software development where the dependencies of a class are provided from the outside as opposed to being defined within the class itself. This minimizes the dependencies between components…. aka loose coupling

Question 21

what does inject mean?

Answer 21

typically to supply a dependency to a component or object from an external source

Question 22

what does RBAC mean?

Answer 22

roll based access control … managing how users interact with the site based on their authorization

Question 23

[Authorize(Roles = “Admin”)]

Answer 23

annotation applied to an endpoint that specifies its access according to the role of the user

Question 24

ASP.NET

Answer 24

framework.. provides a rich set of tools and libraries for developing web applications,

Question 25

what is an interface?

Answer 25

an interface is a construct that you define for classes to implement. A mechanism to introduce polymorphism into your system. They provide additional types to your classes.They define what your class should do, but not how it should do it. They allow you to define common properties and behaviors among different classes in your system so you can group them together into collections.

Question 26

what is polymorphism?

Answer 26

concept in OOP that allows objects of different classes to be treated as objects of a common superclass. It enables a single interface to represent different underlying data types.