PRN 221 tín 1 EXAM QUESTIONS AND ANSWERS

PRN 221 tín 1 EXAM QUESTIONS AND ANSWERS




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 - ANSWER
A

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 - ANSWER A

Which of the following statements related to the Parallel Computing is
True?
Statement 1: Parallel computing is the use of multiple processing
elements simultaneously for solving any problem
Statement 2: In Parallel computing problems are broken down into
instructions 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 - ANSWER B

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. - ANSWER A

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){
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);
}
} - ANSWER A

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();
}
}