Prn221 k tín Questions plus Answers 2024

Prn221 k tín Questions plus Answers 2024



1. what is the following style tag used for?
<Window x:Class="fe.MainWindow" Title="MainWindow" Height="200"
Width="300">
<Window.Resources>
<Style TargetType="TextBlock">
<Setter Property="Foreground" Value="Green"/>
<Setter Property="FontSize" Value="20"/>
</Style>
</Window.Resources>
<StackPanel Margin="10">
<TextBlock>WPF</TextBlock>
<TextBox>NET</TextBox>
</StackPanel>
</Window>
A. Set foreground is Green and FontSize is 20 for textBlock controls
B. Set foreground is Green and FontSize is 20 for textBock controls
C. Set foreground is Green and FontSize is 20 for controls
D. Set background is Green and FontSize is 20 for controls: A
2. public record Order{ Public int
OrderId {get; set}
Public string OrderDate{get; set}
}
Class Program{
Static void Main(string[] args){ List<Order> orders =
new List<Order>{
New Order{OrderId=1, OrderDate="12/5/2030"};
}
Var orderJson = JsonSerializer.Serilize(order);
Console.WriteLine($"orderJson"); Console.ReadKey();
}
}
Which one of the following is the output of the above code? A. [{"OrderId":1,
"OrderDate":"12/5/2030"}]
B. {"OrderId":1, "OrderDate":"12/5/2030"}
C. ["OrderId":1, "OrderDate":"12/5/2030"]
D. An exception will be thrown: A
3. Which of the following statements related to the Parallel Computing is True? Statement 1: Parallel
computing is the use of multiple processing elements




, Prn221 k tín Questions plus Answers 2024



simultaneously for solving any problem
Statement 2: In Parallel computing problems are broken down into instruc- tions and are solved concurently as
each resource that has been applied to work is working at the same time
A. Statement 1 and 2
B. Statement 1
C. Statement 2
D. None of the others: A
4. Javascript clients of signalR application call public method on hubs via the invoke method of the
hubConnection. The invoke method accepts the name of the hub method and any argument defined in the hub
method.
Support that you already have define the following code: Var connection = new
signalR.HubConnectionBuilder()
.withUrl("/chatHub")
.create();
Connection.start();
Which of the following codes you can call "invoke" method?
A. Try {
Await connection .invoke("SendMessage", user, message);
}catch(err){
Console.error(err);
}
B. Try {
Await connection .invokeuser, message, ("SendMessage");
}catch(err){
Console.error(err);
}
C. None of the others.
D. All of the others.: A
5. A hub is a class the server as a high level pipeline that handler client server communication. Create a
SignalR for your application by adding a class name Chathub that inherits from
Microsoft.AspNetCore.SignalR.hub.
A. public class ChatHub: Hub{
Public async task SendMessage(string user, string message){ Await
Client.AllSendAsync("ReceirveMessage", user, message);
}
}
B. public class Hub: ChatHub{
Public async task SendMessage(string user, string message){


, Prn221 k tín Questions plus Answers 2024



Await Client.AllSendAsync("ReceirveMessage", user, message);
}
}
C. public class ChatHub: IHubContext{
Public async task SendMessage(string user, string message){ Await
Client.AllSendAsync("ReceirveMessage", user, message);
}
}
D. public class ChatHub: IHub{
Public async task SendMessage(string user, string message){ Await
Client.AllSendAsync("ReceirveMessage", user, message);
}
}: A
6. class Program {
Static void main (string[] args){
Uri info = new Uri("http://www.domain.com.80/Info?id=123"); Uri page = new
Uri(("http://www.domain.com/info/page.html"); Console.WriteLine($"default HTTP port:
{page post}"); Console.WriteLine($"IsBaseOf: {info.IsBaseOf(page)"); Console.ReadKey();
}
}
Which one of the following is the output of the above code?
A. Default HTTP port 80
IsBaseOf: True
B. Default HTTP port 80
IsBaseOf: False
C. Compile time error
D. A run time exception will be thrown: B
7. Which of the following statements related to Task Parallel Library (TPL) is true?
A. By using TPL, we can maximine the performance of our code while focusing on the work that our program is
designed to accomplish.
B. The Task Parallel Library (TPL) is a set of public types and APIs in the system TPL and
system.Threading.Task namespaces
C. The purpose of the TPL is to make developer more productive by simplifying the process of serial computing
of applications
D. All of the others.: D





, Prn221 k tín Questions plus Answers 2024



8. Choose the correct statement about UIElement on the WPF types
A. That is a class adds the basic functionality of layout, input, focus and event to UI element and set the basic
foundation of the layout process
B. That is a class extends the functionality provided by the UIElement and override the layout framework
level implementations
C. That is a class is the base class for shape elements like Line, Elipse, Polygon, etc
D. None of the others: A
9. ASP.NET Core SignalR support two protocols for encoding message. Each protocol has serialization
configuration options. Please choose the correct protocols.
A. JSON and MessagePack
B. BSON and MessagePack
C. JSON and BSON
D. JSON and XML: A
10. Which of the following ways can be used to implement Background Task?
A. Inheriting BackgroundService class
B. Implementing Iservice Interface
C. Inheriting background task class
D. Implementing IserviceTask interface Answer: gg k
thay: A
11. 23. which if the following is a valid XML Document?
A. <?xml version="1.0" encoding="UTF-8"?>
<Orders>
<Order Id="001">
<Customer>David &amp; Jason</Customer>
<Order>
<Orders>
B. <?xml version="1.0" encoding="UTF-8"?>
<Orders>
<Order Id="001">
<Customer>David & Jason</Customer>
<Order>
<Orders>
C. <?xml version="1.0" encoding="UTF-8">
<Orders>
<Order Id="001">
<Customer>David &amp, Jason</Customer>