Microsoft 70-483 Braindumps 2021

NEW QUESTION 1
DRAG DROP
You are adding a function to a membership tracking application. The function uses an integer named memberCode as an input parameter and returns the membership type as a string.
The function must meet the following requirements: Return "Non-Member" if the memberCode is 0. Return "Member" if the memberCode is 1.
Return "Invalid" if the memberCode is any value other than 0 or 1. You need to implement the function to meet the requirements.
How should you complete the relevant code? (To answer, drag the appropriate statements to the correct locations in the answer area. Each statement may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

Answer:

Explanation: Example:
int caseSwitch = 1; switch (caseSwitch)
{
case 1:
Console.WriteLine("Case 1"); break;
case 2:
Console.WriteLine("Case 2"); break;
default: Console.WriteLine("Default case"); break;
}
Reference: switch (C# Reference) https://msdn.microsoft.com/en-us/library/06tc147t.aspx

NEW QUESTION 2
You have a List object that is generated by executing the following code:

You have a method that contains the following code (line numbers are included for reference only):

You need to alter the method to use a lambda statement. How should you rewrite lines 03 through 06 of the method?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: C

Explanation: This returns a bool and will work fine. Incorrect:
Not A: This returns a string.
Not B, not D: These return IEnumerable.

NEW QUESTION 3
You are implementing a new method named ProcessData. The ProcessData() method calls a thirdparty component that performs a long-running operation.
The third-party component uses the IAsyncResult pattern to signal completion of the long-running operation.
You need to ensure that the calling code handles the long-running operation as a System.Threading.Tasks.Task object.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

• A. Call the component by using the TaskFactory.FromAsync() method.
• B. Create a TaskCompletionSource<T> object.
• C. Apply the async modifier to the method signature.
• D. Apply the following attribute to the method signature: [MethodImpl(MethodImplOptions.Synchronized)]

Answer: AB

Explanation: A: TaskFactory.FromAsync Method
Creates a Task that represents a pair of begin and end methods that conform to the Asynchronous Programming Model pattern. Overloaded.
Example:
TaskFactory.FromAsync Method (IAsyncResult, Action<IAsyncResult>)
Creates a Task that executes an end method action when a specified IAsyncResult completes.
B: In many scenarios, it is useful to enable a Task<TResult> to represent an external asynchronous operation. TaskCompletionSource<TResult> is provided for this purpose. It enables the creation of a task that can be handed out to consumers, and those consumers can use the members of the task as they would any other. However, unlike most tasks, the state of a task created by a TaskCompletionSource is controlled explicitly by the methods on TaskCompletionSource. This enables the completion of the external asynchronous operation to be propagated to the underlying Task. The separation also ensures that consumers are not able to transition the state without access to the corresponding TaskCompletionSource.
Note:
* System.Threading.Tasks.Task Represents an asynchronous operation.

NEW QUESTION 4
You are developing an application by using C#.
The application includes an object that performs a long running process.
You need to ensure that the garbage collector does not release the object's resources until the process completes.
Which garbage collector method should you use?

• A. WaitForFullGCComplete()
• B. SuppressFinalize()
• C. collect()
• D. RemoveMemoryPressure()

Answer: B

Explanation: You can use the SuppressFinalize method in a resource class to prevent a redundant garbage collection from being called.
Reference: GC.SuppressFinalize Method (Object)
https://msdn.microsoft.com/en-us/library/system.gc.suppressfinalize(v=vs.110).aspx

NEW QUESTION 5
DRAG DROP
You have the following class:

You need to implement IEquatable. The Equals method must return true if both ID and Name are set to the identical values. Otherwise, the method must return false. Equals must not throw an exception.
What should you do? (Develop the solution by selecting and ordering the required code snippets. You may not need all of the code snippets.)

Answer:

Explanation: In Box 3 we must use Name.Equals, not Object.Equals, to properly compare two strings. Incorrect:
Not Box 3: Object.Equals (obj, obj) compares the REFERENCE (true if they point to same object). Two strings, even having the same value will never have the same reference. So it is not applicable here.

NEW QUESTION 6
You need to create a method that can be called by using a varying number of parameters. What should you use?

• A. Method overloading
• B. Interface
• C. Named parameters
• D. Lambda expressions

Answer: A

Explanation: Member overloading means creating two or more members on the same type that differ only in the number or type of parameters but have the same name.
Overloading is one of the most important techniques for improving usability, productivity, and readability of reusable libraries. Overloading on the number of parameters makes it possible to provide simpler versions of constructors and methods. Overloading on the parameter type makes it possible to use the same member name for members performing identical operations on a selected set of different types.

NEW QUESTION 7
DRAG DROP
You are developing an application that includes a class named Kiosk. The Kiosk class includes a static property named Catalog. The Kiosk class is defined by the following code segment. (Line numbers are included for reference only.)

You have the following requirements:
Initialize the _catalog field to a Catalog instance. Initialize the _catalog field only once.
Ensure that the application code acquires a lock only when the _catalog object must be instantiated. You need to meet the requirements.
Which three code segments should you insert in sequence at line 09? (To answer, move the appropriate code segments from the list of code segments to the answer area and arrange them in the correct order.)

Answer:

Explanation: After taking a lock you must check once again the _catalog field to be sure that other threads didn't instantiated it in the meantime.

NEW QUESTION 8
An application is throwing unhandled NullReferenceException and FormatException errors. The stack trace shows that the exceptions occur in the GetWebResult() method.
The application includes the following code to parse XML data retrieved from a web service. (Line numbers are included for reference only.)

You need to handle the exceptions without interfering with the existing error-handling infrastructure. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: AC

Explanation: A: The TryParse method is like the Parse method, except the TryParse method does not throw an exception if the conversion fails. It eliminates the need to use exception handling to test for a FormatException in the event that s is invalid and cannot be successfully parsed.
C: UnhandledException event handler
If the UnhandledException event is handled in the default application domain, it is raised there for any unhandled exception in any thread, no matter what application domain the thread started in. If the thread started in an application domain that has an event handler for UnhandledException, the event is raised in that application domain.

NEW QUESTION 9
You are debugging a 64-bit C# application.
Users report System.OutOfMemoryException exceptions. The system is attempting to use arrays larger than 2 GB in size.
You need to ensure that the application can use arrays larger than 2 GB. What should you do?

• A. Add the /3GB switch to the boot.ini file for the operating system.
• B. Set the IMAGE_FILE_LARGE_ADDRESS_AWARE flag in the image header for the application executable file.
• C. Set the value of the gcAllowVeryLargeObjects property to true in the application configuration file.
• D. Set the value of the user-mode virtual address space setting for the operating system to MAX.

Answer: C

Explanation: On 64-bit platforms the gcAllowVeryLargeObjects enables arrays that are greater than 2 gigabytes (GB) in total size.
Reference: <gcAllowVeryLargeObjects> Element https://msdn.microsoft.com/en-us/library/hh285054(v=vs.110).aspx

NEW QUESTION 10
A public class named Message has a method named SendMessage. The SendMessage() method is leaking memory.

• A. Add a finally statement and implement the gc.collect() method.
• B. Modify the Message class to use the IDisposable interface.
• C. Remove the try…catch block and allow the errors to propagate.
• D. Replace the try…catch block with a using statement.

Answer: A

Explanation: Reference: https://docs.microsoft.com/enus/ dotnet/api/system.gc.collect?redirectedfrom=MSDN&view=netframework- 4.7.2#System_GC_Collect

NEW QUESTION 11
You have the following code:

You need to retrieve all of the numbers from the items variable that are greater than 80. Which code should you use?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: A

NEW QUESTION 12
You are developing an application by using C#. You provide a public key to the development team during development.
You need to specify that the assembly is not fully signed when it is built.
Which two assembly attributes should you include in the source code? (Each correct answer presents part of the solution. Choose two.)

• A. AssemblyKeyNameAttribute
• B. ObfuscateAssemblyAttribute
• C. AssemblyDelaySignAttribute
• D. AssemblyKeyFileAttribute

Answer: CD

Explanation: * AssemblyDelaySignAttribute
Specifies that the assembly is not fully signed when created.
* The following code example shows the use of the AssemblyDelaySignAttribute attribute with the AssemblyKeyFileAttribute.
using System;
using System.Refilection; [assembly:AssemblyKeyFileAttribute(“TestPublicKey.snk”)] [assembly:AssemblyDelaySignAttribute(true)]
namespace DelaySign
{
public class Test { }
}
Reference: http://msdn.microsoft.com/en-us/library/t07a3dye(v=vs.110).aspx

NEW QUESTION 13
You are implementing a method named ProcessFile that retrieves data files from web servers and FTP servers. The ProcessFile () method has the following method signature:
Public void ProcessFile(Guid dataFileld, string dataFileUri)
Each time the ProcessFile() method is called, it must retrieve a unique data file and then save the data file to disk.
You need to complete the implementation of the ProcessFile() method. Which code segment should you use?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: D

Explanation: * WebRequest.Create Method (Uri)
Initializes a new WebRequest instance for the specified URI scheme.
* Example:
1. To request data from a host server
Create a WebRequest instance by calling Create with the URI of the resource. C#
WebRequest request = WebRequest.Create("http://www.contoso.com/");
2. Set any property values that you need in the WebRequest. For example, to enable authentication, set the Credentials property to an instance of the NetworkCredential class.
C#
request.Credentials = CredentialCache.DefaultCredentials;
3. To send the request to the server, call GetResponse. The actual type of the returned WebResponse object is determined by the scheme of the requested URI.
C#
WebResponse response = request.GetResponse();
4. To get the stream containing response data sent by the server, use the GetResponseStream method of the WebResponse.
C#
Stream dataStream = response.GetResponseStream ();
5. The StreamReader.ReadToEnd method reads all characters from the current position to the end of the stream.

NEW QUESTION 14
You are developing a C# application. The application references and calls a RESTful web service named EmployeeService. The EmployeeService web service includes a method named GetEmployee, which accepts an employee ID as a parameter. The web service returns the following JSON data from the method.
{"Id":1,"Name":"David Jones">
The following code segment invokes the service and stores the result:

You need to convert the returned JSON data to an Employee object for use in the application. Which code segment should you use?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: C

NEW QUESTION 15
You are developing an application that includes the following code segment:

You need to implement both Start() methods in a derived class named UseStart that uses the Start() method of each interface.
Which two code segments should you use? (Each correct answer presents part of the solution. Choose two.)

• A. Option A
• B. Option B
• C. Option C
• D. Option D
• E. Option E
• F. Option F

Answer: CD

Explanation: C: Because it explicitly implements the two Start functions of both interfaces.
D: Because we need to type cast the starter object to the interface that we want to use the implementation for.
Reference: Inheritance from multiple interfaces with the same method name http://stackoverflow.com/questions/2371178/inheritance-from-multiple-interfaces-with-the-samemethod- name/2371203#2371203

NEW QUESTION 16
You are creating a console application named Appl.
App1 retrieves data from the Internet by using JavaScript Object Notation (JSON).
You are developing the following code segment (line numbers are included for reference only):

You need to ensure that the code validates the JSON string. Which code should you insert at line 03?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: B

Explanation: JavaScriptSerializer().Deserialize
Converts the specified JSON string to an object of type T. Example:
string json = File.ReadAllText(Environment.CurrentDirectory + @"JSON.txt"); Company company = new System.Web.Script.Serialization.JavaScriptSerializer().Deserialize<Company>(
Reference: C# - serialize object to JSON format using JavaScriptSerializer http://matijabozicevic.com/blog/csharp-net-development/csharp-serialize-object-to-json-formatusing- javascriptserialization

NEW QUESTION 17
HOTSPOT
You are implementing a library method that accepts a character parameter and returns a string. If the lookup succeeds, the method must return the corresponding string value. If the lookup fails, the method must return the value "invalid choice."
You need to implement the lookup algorithm.
How should you complete the relevant code? (To answer, select the correct keyword in each dropdown list in the answer area.)

Answer:

Explanation:
switch(letter){ case ‘a’:
case ‘m’: default:
}
Reference: switch (C# Reference)
http://msdn.microsoft.com/en-us/library/06tc147t(v=vs.110).aspx

NEW QUESTION 18
You are developing an application by using C#. The application will write events to an event log. You plan to deploy the application to a server.
You create an event source named MySource and a custom log named MyLog on the server. You need to write events to the custom log.
Which code segment should you use?

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: D