Downloadable 70-483 Testing Bible 2021

NEW QUESTION 1
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 2
You are developing an application that includes a class named Order. The application will store a collection of Order objects.
The collection must meet the following requirements: Internally store a key and a value for each collection item. Provide objects to iterators in ascending order based on the key. Ensure that item are accessible by zero-based index or by key. You need to use a collection type that meets the requirements. Which collection type should you use?

• A. LinkedList
• B. Queue
• C. Array
• D. HashTable
• E. SortedList

Answer: E

Explanation:
SortedList<TKey, TValue> - Represents a collection of key/value pairs that are sorted by key based on the associated IComparer<T> implementation.
http://msdn.microsoft.com/en-us/library/ms132319.aspx

NEW QUESTION 3
You are troubleshooting an application that uses a class named FullName. The class is decorated with the DataContractAttribute attribute. The application includes the following code. (Line numbers are included for reference only.)

You need to ensure that the entire FullName object is serialized to the memory stream object. Which code segment should you insert at line 09?

• A. binary.WriteEndDocument();
• B. binary.WriteEndDocumentAsync();
• C. binary.WriteEndElementAsync();
• D. binary.Flush();

Answer: D

Explanation:
Example:
MemoryStream stream2 = new MemoryStream();
XmlDictionaryWriter binaryDictionaryWriter = XmlDictionaryWriter.CreateBinaryWriter(stream2); serializer.WriteObject(binaryDictionaryWriter, record1);
binaryDictionaryWriter.Flush(); Incorrect:
Not A: throws InvalidOperationException.
Reference: https://msdn.microsoft.com/en-us/library/ms752244(v=vs.110).aspx

NEW QUESTION 4
You are developing an assembly.
You plan to sign the assembly when the assembly is developed. You need to reserve space in the assembly for the signature.
What should you do?

• A. Run the Assembly Linker tool from the Windows Software Development Kit (Windows SDK).
• B. Run the Strong Name tool from the Windows Software Development Kit (Windows SDK).
• C. Add the AssemblySignatureKeyAttribute attribute the assembly.
• D. Add the AssemblyDelaySignAttribute attribute to the assembly.

Answer: D

Explanation:
The AssemblyDelaySignAttribute class specifies that the assembly is not fully signed when created. Reference: https://msdn.microsoft.com/enus/ library/system.refilection.assemblydelaysignattribute(v=vs.110).aspx

NEW QUESTION 5
An application receives JSON data in the following format:

The application includes the following code segment. (Line numbers are included for reference only.)

You need to ensure that the ConvertToName() method returns the JSON input string as a Name object.
Which code segment should you insert at line 10?

• A. Return ser.ConvertToType<Name>(json);
• B. Return ser.DeserializeObject(json);
• C. Return ser.Deserialize<Name>(json);
• D. Return (Name)ser.Serialize(json);

Answer: C

Explanation:
JavaScriptSerializer.Deserialize<T> - Converts the specified JSON string to an object of type T. http://msdn.microsoft.com/en-us/library/bb355316.aspx

NEW QUESTION 6
DRAG DROP
An application serializes and deserializes XML from streams. The XML streams are in the following format:

The application reads the XML streams by using a DataContractSerializer object that is declared by the following code segment:

You need to ensure that the application preserves the element ordering as provided in the XML stream.
You have the following code:

Which attributes should you include in Target 1, Target 2 and Target 3 to complete the code? (To answer, drag the appropriate attributes to the correct targets in the answer area. Each attribute 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Target 1: The DataContractAttribute.Namespace Property gets or sets the namespace for the data contract for the type. Use this property to specify a particular namespace if your type must return data that complies with a specific data contract.
Target2, target3: We put Order=10 on FirstName to ensure that LastName is ordered first. Note:
The basic rules for data ordering include:
* If a data contract type is a part of an inheritance hierarchy, data members of its base types are always first in the order.
* Next in order are the current type’s data members that do not have the Order property of the DataMemberAttribute attribute set, in alphabetical order.
* Next are any data members that have the Order property of the DataMemberAttribute attribute set. These are ordered by the value of the Order property first and then alphabetically if there is more than one member of a certain Order value. Order values may be skipped.
Reference: Data Member Order
https://msdn.microsoft.com/en-us/library/ms729813(v=vs.110).aspx Reference: DataContractAttribute.Namespace Property https://msdn.microsoft.com/enus/
library/system.runtime.serialization.datacontractattribute.namespace(v=vs.110).aspx

NEW QUESTION 7
You are developing a C# application that has a requirement to validate some string input data by using the Regex class.
The application includes a method named ContainsHyperlink. The ContainsHyperlink() method will verify the presence of a URI and surrounding markup.
The following code segment defines the ContainsHyperlink() method. (Line numbers are included for reference only.)

The expression patterns used for each validation function are constant.
You need to ensure that the expression syntax is evaluated only once when the Regex object is
initially instantiated.
Which code segment should you insert at line 04?

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

Answer: D

Explanation:
RegexOptions.Compiled - Specifies that the regular expression is compiled to an assembly.This yields faster execution but increases startup time.This value should not be assigned to the Options property when calling the CompileToAssembly method.
http://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regexoptions.aspx Additional info
http://stackoverflow.com/questions/513412/how-does-regexoptions-compiled-work

NEW QUESTION 8
DRAG DROP
You are developing a class named Temperature.
You need to ensure that collections of Temperature objects are sortable. You have the following code:

Which code segments should you include in Target 1, Target 2 and Target 3 to complete the code? (To answer, drag the appropriate code segments to the correct targets in the answer area. Each code segment 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Note: Target 1:
The role of IComparable is to provide a method of comparing two objects of a particular type. This is necessary if you want to provide any ordering capability for your object.
Incorrect: The role of IComparer is to provide additional comparison mechanisms. For example, you may want to provide ordering of your class on several fields or properties, ascending and descending order on the same field, or both.
Target 2, Target 3: Example:
// Implement IComparable CompareTo method - provide default sort order. int IComparable.CompareTo(object obj)
{
car c=(car)obj;
return String.Compare(this.make,c.make);
}
Reference: How to use the IComparable and IComparer interfaces in Visual C# https://support.microsoft.com/en-us/kb/320727

NEW QUESTION 9
DRAG DROP
You are creating a method that saves information to a database.
You have a static class named LogHelper. LogHelper has a method named Log to log the exception. You need to use the LogHelper Log method to log the exception raised by the database server. The solution must ensure that the exception can be caught by the calling method, while preserving the original stack trace.
How should you write the catch block? (Develop the solution by selecting and ordering the required code snippets. You may not need all of the code snippets.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Note:
Catch the database exception, log it, and then rethrow it.
* SQLException
An exception that provides information on a database access error or other errors. Example:
catch (SqlException ex)
{
LogHelper.Log(ex); throw;
}

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 are developing an application that uses structured exception handling. The application includes a class named Logger. The Logger class implements a method named Log by using the following code segment:
public static void Log(Exception ex) { } You have the following requirements:
Log all exceptions by using the Log() method of the Logger class. Rethrow the original exception, including the entire exception stack. You need to meet the requirements. Which code segment should you use?

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

Answer: D

NEW QUESTION 12
HOTSPOT
You define a class by using the following code:

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

To answer, complete each statement according to the information presented in the code.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 13
You are developing an application that includes methods named ConvertAmount and TransferFunds. You need to ensure that the precision and range of the value in the amount variable is not lost when the TransferFunds() method is called.
Which code segment should you use?

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

Answer: A

Explanation:
The double keyword signifies a simple type that stores 64-bit floating-point values. The float keyword signifies a simple type that stores 32-bit floating-point values. Reference: double (C# Reference)

NEW QUESTION 14
DRAG DROP
You are developing a C# console application that outputs information to the screen. The following code segments implement the two classes responsible for making calls to the Console object:

When the application is run, the console output must be the following text: Log started
Base: Log continuing Finished
You need to ensure that the application outputs the correct text.
Which four lines of code should you use in sequence? (To answer, move the appropriate classes from the list of classes to the answer area and arrange them in the correct order.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Incorrect:
Not Box 4: logger.LogCompleted();
The output would incorrectly be “Completed”

NEW QUESTION 15
You are developing an application that uses a .config file. The relevant portion of the .config file is shown as follows:

You need to ensure that diagnostic data for the application writes to the event tog by using the configuration specified in the .config file.
What should you include in the application code?

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

Answer: D

Explanation:
Incorrect:
Not B: There is only a “TraceListener” defined in the config file. In fact, there is no “eventlogDebugListener” class.

NEW QUESTION 16
HOTSPOT
You have the following code (line numbers are included for reference only):

To answer, complete each statement according to the information presented in the code.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 17
You are developing an application that accepts the input of dates from the user.
Users enter the date in their local format. The date entered by the user is stored in a string variable named inputDate. The valid date value must be placed in a DateTime variable named validatedDate. You need to validate the entered date and convert it to Coordinated Universal Time (UTC). The code must not cause an exception to be thrown.
Which code segment should you use?

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

Answer: A

Explanation:
AdjustToUniversal parses s and, if necessary, converts it to UTC.
Note: The DateTime.TryParse method converts the specified string representation of a date and time to its DateTime equivalent using the specified culture-specific format information and formatting style, and returns a value that indicates whether the conversion succeeded.

NEW QUESTION 18
You are creating a class named Game.
The Game class must meet the following requirements: Include a member that represents the score for a Game instance. Allow external code to assign a value to the score member.
Restrict the range of values that can be assigned to the score member. You need to implement the score member to meet the requirements. In which form should you implement the score member?

• A. protected field
• B. public static field
• C. public static property
• D. public property

Answer: D

Explanation:
For a public the type or member can be accessed by any other code in the same assembly or another assembly that references it.
Reference: Access Modifiers (C# Programming Guide) https://msdn.microsoft.com/en-us/library/ms173121.aspx

NEW QUESTION 19
You are developing an application that includes a class named BookTracker for tracking library books. The application includes the following code segment. (Line numbers are included for reference only.)

You need to add a book to the BookTracker instance. What should you do?

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

Answer: A

NEW QUESTION 20
You are adding a public method named UpdateGrade to a public class named ReportCard. The code region that updates the grade field must meet the following requirements:
It must be accessed by only one thread at a time. It must not be vulnerable to a deadlock situation.
You need to implement the UpdateGrade() method. What should you do?

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

Answer: A

Explanation:
Because the class is public, you need a private lock Object. Incorrect:
Not B, not C: Once the ReportCard is public, other process can lock on type or instance. So, these options are leaning to a DEADLOCK.
Not D: [MethodImpl] attribute works locking on type (for static members) or on the instance(for instance members). It could cause a DEADLOCK.
Reference: https://msdn.microsoft.com/en-us/library/c5kehkcz.aspx

NEW QUESTION 21
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 22
You need to write a console application that meets the following requirements:
If the application is compiled in Debug mode, the console output must display Entering debug mode. If the application is compiled in Release mode, the console output must display Entering release mode.
Which code should you use?

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

Answer: D

Explanation:
* Programmatically detecting Release/Debug mode (.NET) Boolean isDebugMode = false;
#if DEBUG
isDebugMode = true;
* #elif
#elif lets you create a compound conditional directive. Example:
#define VC7
//…
#if debug Console.Writeline(“Debug build”);
#elif VC7
Console.Writeline(“Visual Studio 7”);
#endif
Reference: http://stackoverflow.com/questions/654450/programmatically-detecting-release-debugmode- net

NEW QUESTION 23
DRAG DROP
You are developing an application that implements a set of custom exception types. You declare the custom exception types by using the following code segments:

The application includes a function named DoWork that throws .NET Framework exceptions and custom exceptions. The application contains only the following logging methods:

The application must meet the following requirements:
When ContosoValidationException exceptions are caught, log the information by using the static void Log (ContosoValidationException ex) method.
When ContosoDbException or other ContosoException exceptions are caught, log the information by using the static void Log(ContosoException ex) method.
You need to meet the requirements.
How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations in the answer area. Each code segment 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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Catch the most specific exception first.

NEW QUESTION 24
An application will upload data by using HTML form-based encoding. The application uses a method named SendMessage.
The SendMessage() method includes the following code. (Line numbers are included for reference only.)

The receiving URL accepts parameters as form-encoded values.
You need to send the values intA and intB as form-encoded values named a and b, respectively. Which code segment should you insert at line 04?

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

Answer: D

Explanation:
WebClient.UploadValuesTaskAsync - Uploads the specified name/value collection to the resource identified by the specified URI as an asynchronous operation using a task object. These methods do not block the calling thread.
http://msdn.microsoft.com/en-us/library/system.net.webclient.uploadvaluestaskasync.aspx

NEW QUESTION 25
You are developing an application. The application includes a method named ReadFile that reads data from a file.
The ReadFile() method must meet the following requirements: It must not make changes to the data file.
It must allow other processes to access the data file.
It must not throw an exception if the application attempts to open a data file that does not exist. You need to implement the ReadFile() method.
Which code segment should you use?

• A. var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read, FileShare.ReadWrite);
• B. var fs = File.Open(Filename, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
• C. var fs = File.Open(Filename, FileMode.OpenOrCreate, FileAccess.Read, FileShare.Write);
• D. var fs = File.ReadAllLines(Filename);
• E. var fs = File.ReadAllBytes(Filename);

Answer: A

Explanation:
FileMode.OpenOrCreate - Specifies that the operating system should open a file if it exists; otherwise, a new file should be created. If the file is opened with FileAccess.Read, FileIOPermissionAccess.Read permission is required. If the file access is FileAccess.Write,
FileIOPermissionAccess.Write permission is required. If the file is opened with FileAccess.ReadWrite, both FileIOPermissionAccess.Read and FileIOPermissionAccess.Write permissions are required. http://msdn.microsoft.com/en-us/library/system.io.filemode.aspx
FileShare.ReadWrite - Allows subsequent opening of the file for reading or writing.If this flag is not specified, any request to open the file for reading or writing (by this process or another process) will fail until the file is closed.However, even if this flag is specified, additional permissions might still be needed to access the file.
http://msdn.microsoft.com/pl-pl/library/system.io.fileshare.aspx

NEW QUESTION 26
DRAG DROP
You are developing an application that includes a class named Customer.
The application will output the Customer class as a structured XML document by using the following code segment:

You need to ensure that the Customer class will serialize to XML. You have the following code:

Which code segments should you include in Target 1, Target 2, Target 3 and Target 4 to complete the code? To answer, drag the appropriate code segments to the correct targets. Each code segment 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.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 27
You plan to debug an application remotely by using Microsoft Visual Studio 2013. You set a breakpoint in the code.
When you compile the application, you get the following error message: "The breakpoint will not currently be hit. No symbols have been loaded for this document."
You need to ensure that you can debug the application remotely. What should you do?

• A. Modify the Assemblylnfo.es file.
• B. Copy .exe files to the Symbols folder on the local computer.
• C. Copy the .cs files to the remote server.
• D. Use .NET Remote Symbol Loading.

Answer: A

Explanation:
References: https://msdn.microsoft.com/en-us/library/y7f5zaaa.aspx

NEW QUESTION 28
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