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PRN221 FE Questions and Correct Answers the Latest Update
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Choose the correct statement about key components of the System.Net.* Namespaces a. HttpServer for consuming HTTP web APIs and RESTful services b. WebRequest and WebResponse classes for high-level control over client-side TCP or UDP operations c. All of the others *d. A WebClient facade...

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  • November 7, 2024
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  • 2024/2025
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PRN221 FE Questions and Correct
Answers the Latest Update
Choose the correct statement about key components of the System.Net.*

Namespaces

a. HttpServer for consuming HTTP web APIs and RESTful services

b. WebRequest and WebResponse classes for high-level control over client-side

TCP or UDP operations

c. All of the others

*d. A WebClient facade class for simple download/upload operations via HTTP

or FTP*


✓ d



To configure a custom number of reconnect attempts before disconnecting or

change the reconnect timing, the withAutomaticReconnect accepts an array of

numbers representing the delay in milliseconds to wait before starting each

reconnect attempt. Choose the correct option for making automatically

reconnect.

a. const connection = new signalR.HubConnectionBuilder() .withUrl("/chathub")

.withAutomaticReconnect(0, 0, 10000) .create();




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b. const connection = new signalR.HubConnectionBuilder() .withUrl("/chathub")

.withAutomaticReconnect([0, 0, 10000]) .build();




c. const connection = new signalR.HubConnectionBuilder() .withUrl("/chathub")

.withAutomaticReconnect([0], [0], [10000]) .build();




d. None of the others


✓ b



Choose the correct statement related to Networking Definitions

a. Port: unsigned 4-byte integer helps operating system differentiating a

network communicating process

b. IP address includes IPv4 (4-byte) and IPv6 (6-byte)

*c. IP address (Internet Protocol): unsigned integer helps to identify a network

element(computer, router, etc)*

d. None of the others


✓ c



Which of the following methods of the HttpClient Class can be used to send a

POST request to the specified Uri as an asynchronous operation?

a. CreatePostAsync(String, HttpContent)



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b. PostRequestAsync(String, HttpContent)

c. PutAsync(String, HttpContent)

*d. PostAsync(String, HttpContent)*


✓ d



Which of the following classes of the System.Threading.Tasks Namespace

provides support for creating and scheduling Task objects?

*a. TaskFactor*

b. Task

c. TaskInit

d. None of the others

e. TaskScheduler


✓ a



In the case working ASP.NET SignalR with JavaScript client library, which the

following code to create and start a connection?

a. var connection = new signalR.ConnectionBuilder() .withUrl("/chatHub")

.build();

connection.start();




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b. var connection = new signalR.HubConnectionBuilder(.withUrl("/chatHub")

.create();

connection.start();




c. var connection = new signalR.HubConnectionBuilder().withUrl("/chatHub")

.build();

connection.start();




d. var connection = new

signalR.HubBuilder() .withUrl("/chatHub") .build();

connection.start();


✓ c



A hub is a class that serves as a high-level pipeline that handles client-server

communication. Create a SignalR for your application by adding a class named

ChatHub that inherits from Microsoft.AspNetCore.SignalR.Hub




a. public class ChatHub : IHub {

public async Task SendMessage(string user, string message) {

await Clients.All.SendAsync("ReceiveMessage", user, message);

}}
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