RestFUL APIs

Question 1

MVC

Model
View
Controller

Answer 1

חלוקה רעיונית

Question 2

AJAX

Asynchronous
JavaScript
And
XML

Answer 2

AJAX=

היא טכניקה ליצירת יישומי רשת אינטראקטיביים המבוססים על קוד המורץ במסגרת דף HTML בודד, ולא כיישום מרובה דפים, כמקובל בסביבת ה-Web

Question 3

ASP.NET

Answer 3

ASP.NET=

היא טכנולוגית קוד פתוח ליישומי אינטרנט בצד השרת, שפותחה על ידי חברת מיקרוסופט

ASP.NET is an open-source, server-side web-application framework designed for web development to produce dynamic web pages

ASP.NET משלבת בנוסף טכנולוגיית MVC, שמאפשרת לפתח אפליקציות רשת במהירות ובקלות

ASP.NET MVC – allows for building web pages using the model–view–controller design pattern.

Question 4

MVC/ Model View Controller

Answer 4

MVC/ Model View Controller=

תבנית עיצוב בהנדסת תוכנה המשמשת להפשטת יישום כלשהו

Model מודל
המודל הוא יצוג מסוים של המידע עליו פועל היישום

View תצוגה
ממיר את נתוני המודל לייצוג המאפשר למשתמש לבצע פעולה כלשהי

Controller בקר
תפקידו לעבד ולהגיב לאירועים המתרחשים בתצוגה, כתגובה לפעולה של המשתמש

Question 5

ASP.NET Web API

API = Application Programming Interface is a

connection between computers or between computer programs.

Answer 5

ASP.NET Web API=

A framework for building Web APIs on top of the .NET Framework

Web API=
is an application programming interface for either a web server or a web browser.

A web API that obeys the REST constraints is informally described as RESTful. RESTful web APIs are typically loosely based on HTTP methods to access resources via URL-encoded parameters and the use of JSON or XML to transmit data.

Question 6

Web API Server side

API = Application Programming Interface is a

connection between computers or between computer programs.

Answer 6

Web API Server side=

server-side web API is a programmatic interface defines request–response message system, typically in JSON or XML

exposed via HTTP-based web server

Question 7

Web API Client side

API = Application Programming Interface is a

connection between computers or between computer programs.

Answer 7

Web API Client side=

client-side web API is a programmatic interface to extend functionality within a web browser or other HTTP client

Question 8

REST

Representational state transfer

Answer 8

REST/ Representational state transfer=

software architectural style
that was created to guide the design and development of the architecture for the World Wide Web

A web API that obeys the REST constraints is informally described as RESTful. RESTful web APIs are typically loosely based on HTTP methods to access resources via URL-encoded parameters and the use of JSON or XML to transmit data.

It provides operations (HTTP methods) such as GET, POST, PUT, and DELETE as request,
and response as:
 - 200 = ok
- 404 = server not found
- 500 = error

Question 9

HTTP methods

request/ response

Answer 9

HTTP methods =

Request methods:
GET, POST, PUT, DELETE

Response status codes:
1XX (informational)
2XX (successful) request was successfully received, understood, and accepted
3XX (redirection)
4XX (client error) request contains bad syntax or cannot be fulfilled
5XX (server error) server failed to fulfill an apparently valid request

• 200 = ok
• 404 = website not found
• 500 = server error

Question 10

HTTP

Hypertext Transfer Protocol

Answer 10

HTTP = Hypertext Transfer Protocol =

protocol used to transfer data over the web.

Question 11

XML

Extensible Markup Language

Answer 11

XML=Extensible Markup Language=

markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.

Question 12

JSON

JavaScript Object Notation

Answer 12

JSON - JavaScript Object Notation=

data interchange format
that uses human-readable text to store and transmit data objects,

common data format with a diverse range of functionality in data interchange including communication of web applications with servers

Question 13

body html

Answer 13

body html=

element contains all the contents of an HTML document

Question 14

HTML= hypertext markup language

Answer 14

HTML- hypertext markup language=

a formatting system for displaying material retrieved over the Internet.

is called hypertext markup language because it is a language that allows users to organize, improve the appearance of, and link text with data on the internet

Question 15

What are the 10 basic HTML tags

Answer 15

What are the 10 basic HTML tags=

 This is the root element tag. ...
 ...
 ...
 ...
<h1></h1> ...
<p></p> ...
<a></a> ...
<img>

Question 16

Basic HTML - What are the types of HTML tags?

Tag Description

Answer 16

Basic HTML

Tag Description
Defines the document type

Question 17

Basic HTML - What are the types of HTML tags?

Tag Description

Answer 17

Basic HTML

Tag Description
Defines an HTML document

Question 18

Basic HTML - What are the types of HTML tags?

Tag Description

Answer 18

Basic HTML

Tag Description
Contains metadata/information for the document

Question 19

Basic HTML - What are the types of HTML tags?

Tag Description

Answer 19

Basic HTML

Tag Description
Defines a title for the document

Question 20

Flag variable

Answer 20

Flag variable is used as a signal in programming to let the program know that a certain condition has met.

It usually acts as a boolean variable indicating a condition to be either true or false.

Question 21

An event handler, in C#

method //

callback routine//

Answer 21

An event handler, in C#

1. is a method that contains the code
   that gets executed in response
   to a specific event
   that occurs in an application.
2. is a callback routine that operates asynchronously and handles inputs received into a program (events)
3. event Handling is the mechanism that controls the event and decides what should happen if an event occurs.

Event handlers are used in graphical user interface (GUI) applications to handle events such as button clicks and menu selections, raised by controls in the user interface

Question 22

How do you raise an event in C#?

Answer 22

How do you raise an event in C#?

First you check the event against
a null value
to ensure that the caller has registered with the event, and then you fire the event by specifying the event by name as well as any required parameters as defined by the associated delegate. MyEvent(message);

Question 23

difference between an event and a delegate

Answer 23

difference between an event and a delegate

Delegate is a function pointer.

An event is dependent on a delegate and cannot be created without delegates. Event is a wrapper around delegate instance to prevent users of the delegate from resetting the delegate and its invocation list and only allows adding or removing targets from the invocation list

Question 24

Why are delegates used?

Answer 24

Why are delegates used?

Delegates allow methods to be passed as parameters.

Delegates can be used to define callback methods.

Question 25

REST API RESTful web services Web API RESTful web APIs

Answer 25

REST API= it is service on the server side that conforms to the constraints of REST architectural style and allows for interaction with RESTful web services. סדרה של חוקים, הקובעים מה השירות מקבל ומה הוא מחזיר, על איזה פרוטוקול תקשורת הוא עובד ועוד RESTful web services= is a lightweight, maintainable, and scalable service that is built on the REST architecture. Restful Web Service, expose API from your application in a secure, uniform, stateless manner to the calling client. The underlying protocol for REST is HTTP. REST stands for REpresentational State Transfer. Web API= Web API is an application programming interface on WWW RESTful web APIs= based on HTTP methods to access resources via URL-encoded parameters and the use of JSON or XML to transmit data. It provides operations (HTTP methods) such as GET, POST, PUT, and DELETE.

Question 26

RESTful web APIs REpresentational State Transfer

Answer 26

RESTful web APIs= based on HTTP methods to access resources via URL-encoded parameters and the use of JSON or XML to transmit data. It provides operations (HTTP methods) such as GET, POST, PUT, and DELETE. API is an application programming interface REpresentational State Transfer

Question 27

Web API

Answer 27

Web API= Web API is an Application Programming Interface

Question 28

ADO.NET ActiveX Data Objects

Answer 28

ADO.NET= ADO is the acronym for ActiveX Data Objects ADO.NET is a set of classes (a framework) to interact with data sources such as databases and XML files. NET applications that use ADO.NET to connect to a database, execute commands and retrieve data from the database

Question 29

LINQ | SingleOrDefault

Answer 29

SingleOrDefault The method returns a single specific element of a sequence. FirstOrDefault returns a first item of potentially multiple (or default if none exists).

Question 30

char[] arr C#

Answer 30

char[] arr array of pointers An array of pointers to strings is an array of character pointers where each pointer points to the first character of the string or the base address of the string.

Question 31

Package Manager

Answer 31

Package Manager = ``` מערכת המאפשרת להתקין ספריה בתוך פרויקט הספריה יכולה לכלול קבצים DLL-ים סקריפטים ועוד לדוט נט יש NuGet ```

Question 32

מודל שכבות ע"י | Entity Framework

Answer 32

מודל שכבות ע"י Entity Framework ``` צרו מההתחלה את כל מודל השכבות על המודל לכלול DAL = BLL = DTOs = UI = ```

Question 33

get | set

Answer 33

get / set =

Question 34

decimal? short?

Answer 34

decimal? short? טיפוס נתונים עם סימן שאלה מאפשרים להכניס ערכים של null נקראים Nullable type

Question 35

Functions: ??? public private protected

Answer 35

Functions: public private protected

Question 36

CORS Cross-Origin Resource Sharing

Answer 36

CORS Cross-Origin Resource Sharing is a mechanism that allows restricted resources on a web page to be requested from another domain outside the domain from which the first resource was served. Domainy.com receives that request and will respond back with either: Access-Control-Allow-Origin: http://domainx.com. Access-Control-Allow-Origin: * (meaning all domains are allowed) An error if the cross-origin requests are not allowed. Anabel CORS: 1. Open Internet Information Service (IIS) Manager. 2. Right click the site you want to enable CORS for and go to Properties. 3. Change to the HTTP Headers tab. 4. In the Custom HTTP headers section, click Add. 5. Enter Access-Control-Allow-Origin as the header name. 6. Enter * as the header value. 7. Click Ok twice. Cовместное использование ресурсов между разными источниками. Tехнология современных браузеров, которая позволяет предоставить веб-страницам доступ к ресурсам другого домена Суть технологии CORS: Есть три домена, позволяющие загрузить ресурсы с сервера Z. Для того, чтобы это стало возможным, веб-серверу Z, который отдает контент, достаточно указать в заголовке ответа Access-Control-Allow-Origin список доверенных доменов: A, B, C. Тогда для страниц этих доменов не будут действовать ограничения *принципа одинакового источника* на запрашиваемые страницы: Access-Control-Allow-Origin: A, B, C Правило ограничения домена: (Same Origin Policy, в переводе с англ. — «Принцип одинакового источника») — это важная концепция безопасности для некоторых языков программирования на стороне клиента, таких как JavaScript. Политика разрешает сценариям, находящимся на страницах одного сайта, доступ к методам и свойствам друг друга без ограничений, но предотвращает доступ к большинству методов и свойств для страниц на разных сайтах. Одинаковые источники — это источники, у которых совпадают три признака: 1. домен; 2. порт; 3. протокол.

Question 37

Dependency injection

Answer 37

Dependency injection= is a software design pattern. It allows us to develop loosely-coupled code. Dependency Injection reduces the hard-coded dependencies among your classes by injecting those dependencies at run time instead of design time technically.

Question 38

jQuery | library

Answer 38

jQuery = is a lightweight, "write less, do more", JavaScript library. The purpose of jQuery is to make it much easier to use JavaScript on your website.