70-483 | Microsoft 70-483 Exam Dumps 2021

NEW QUESTION 1
You are developing an application that uses multiple asynchronous tasks to optimize performance. You need to retrieve the result of an asynchronous task.
Which code segment should you use?

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

Answer: C

Explanation: Use the async modifier to specify that a method, lambda expression, or anonymous method is asynchronous. If you use this modifier on a method or expression, it's referred to as an async method.
Example:
public async Task<int> ExampleMethodAsync()
{
// . . . .
}
Reference: async (C# Reference) https://msdn.microsoft.com/en-us/library/hh156513.aspx

NEW QUESTION 2
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 3
You are developing an application that includes the following code segment:

You need to implement the Open() method of each interface in a derived class named UseResources and call the Open() 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

Answer: AC

Explanation: * An interface contains only the signatures of methods, properties, events or indexers. A class or struct that implements the interface must implement the members of the interface that are specified in the interface definition.
* Example:
interface ISampleInterface
{
void SampleMethod();
}
class ImplementationClass : ISampleInterface
{
// Explicit interface member implementation: void ISampleInterface.SampleMethod()
{
// Method implementation.
}
static void Main()
{
// Declare an interface instance.
ISampleInterface obj = new ImplementationClass();
// Call the member. obj.SampleMethod();
}
}

NEW QUESTION 4
You are creating an application that processes a list of numbers.
The application must define a method that queries the list and displays a subset of the numbers to the user. The method must not update the list.
You need to create an extendable query by using LINQ. What should you do?

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

Answer: C

NEW QUESTION 5
You are creating a class named Loan.
The Loan class must meet the following requirements: Include a member that represents the rate for a Loan instance. Allow external code to assign a value to the rate member.
Restrict the range of values that can be assigned to the rate member.
You need to implement the rate member to meet the requirements. In which form should you implement the rate member?

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

Answer: B

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 6
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. ReRegisterForFinalize()
• B. SuppressFinalize()
• C. Collect()
• D. WaitForFullGCApproach()

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 7
You are developing an application that includes the following code segment. (Line numbers are included for reference only.)

The GetCustomers() method must meet the following requirements: Connect to a Microsoft SQL Server database.
Populate Customer objects with data from the database.
Return an IEnumerable<Customer> collection that contains the populated Customer objects. You need to meet the requirements.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

• A. Insert the following code segment at line 17: while (sqlDataReader.GetValues())
• B. Insert the following code segment at line 14: sqlConnection.Open();
• C. Insert the following code segment at line 14: sqlConnection.BeginTransaction();
• D. Insert the following code segment at line 17: while (sqlDataReader.Read())
• E. Insert the following code segment at line 17: while (sqlDataReader.NextResult())

Answer: BD

Explanation: B: SqlConnection.Open - Opens a database connection with the property settings specified by the ConnectionString.
Reference: http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection.open.aspx D: SqlDataReader.Read - Advances the SqlDataReader to the next record.
Reference: http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.read.aspx Not E: reader.NextResult is wrong because that is used when reader has more than one result set (SP or inline SQL has more than one Select).

NEW QUESTION 8
You are developing an application that uses structured exception handling. The application includes a class named ExceptionLogger.
The ExceptionLogger class implements a method named LogException by using the following code segment:
public static void LogException(Exception ex) You have the following requirements:
Log all exceptions by using the LogException() method of the ExceptionLogger 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: A

Explanation: Once an exception is thrown, part of the information it carries is the stack trace. The stack trace is a list of the method call hierarchy that starts with the method that throws the exception and ends with the method that catches the exception. If an exception is re-thrown by specifying the exception in the throw statement, the stack trace is restarted at the current method and the list of method calls between the original method that threw the exception and the current method is lost. To keep the original stack trace information with the exception, use the throw statement without specifying the exception.
Reference: http://msdn.microsoft.com/en-us/library/ms182363(v=vs.110).aspx

NEW QUESTION 9
You are evaluating a method that calculates loan interest. The application includes the following code segment. (Line numbers are included for reference only.)

When the loanTerm value is 5 and the loanAmount value is 4500, the loanRate must be set to 6.5 percent.
You need to adjust the loanRate value to meet the requirements. What should you do?

• A. Replace line 15 with the following code segment: loanRate = 0.065m;
• B. Replace line 07 with the following code segment: loanRate = 0.065m;
• C. Replace line 17 with the following code segment: interestAmount = loanAmount * 0.065m * loanTerm;
• D. Replace line 04 with the following code segment: decimal loanRate = 0.065m;

Answer: A

Explanation: Line 15 will be executed when the loanTerm value is 5.

NEW QUESTION 10
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 11
You are developing an application.
The application contains the following code:

When you compile the code, you receive the following syntax error message: "A previous catch clause already catches all exceptions of this or a super type ('System.Exception')."
You need to ensure that the code can be compiled. What should you do?

• A. Catch the ArgumentException exception instead of the ArgumentNullException exception.
• B. Throw a new exception in the second catch block.
• C. Catch the ArgumentNullException exception first.
• D. Re-throw the exception caught by the second catch block.

Answer: A

NEW QUESTION 12
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have the following C# code. (Line numbers are included for reference only.)

You need the foreach loop to display a running total of the array elements, as shown in the following output.
13610
15
Solution: You insert the following code at line 02:

Does this meet the goal?

• A. Yes
• B. No

Answer: B

NEW QUESTION 13
You need to write a method that retrieves data from a Microsoft Access 2013 database. The method must meet the following requirements:
Be read-only.
Be able to use the data before the entire data set is retrieved.
Minimize the amount of system overhead and the amount of memory usage. Which type of object should you use in the method?

• A. DbDataAdapter
• B. unTyped DataSet
• C. OleDbDataAdapter
• D. DbDataReader

Answer: D

Explanation: The DbDataReader class reads a forward-only stream of rows from a data source.
Reference: DbDataReader Class
https://msdn.microsoft.com/en-us/library/system.data.common.dbdatareader(v=vs.110).aspx

NEW QUESTION 14
DRAG DROP
You are developing an application that will populate an extensive XML tree from a Microsoft SQL Server 2008 R2 database table named Contacts.
You are creating the XML tree. The solution must meet the following requirements: Minimize memory requirements.
Maximize data processing speed.
You open the database connection. You need to create the XML tree.
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.)

Answer:

Explanation: The second box should be XElement and not the XAttribute as contacts, as you cannot have XElement as a child of an XAttribute.

NEW QUESTION 15
You are developing an application that will process personnel records. The application must encrypt highly sensitive data.
You need to ensure that the application uses the strongest available encryption. Which class should you use?

• A. System.Security.Cryptography.DES
• B. System.Security.Cryptography.Aes
• C. System.Security.Cryptography.TripleDES
• D. System.Security.Cryptography.RC2

Answer: B

Explanation: Advanced Encryption Standard (AES) has been adopted by the U.S. government and is now used worldwide. It supersedes the Data Encryption Standard (DES). AES key sizes are 128, 192 or 256 bits.
Incorrect:
DES, 3DES, and RC2 are all less secure.
Reference: https://en.wikipedia.org/wiki/Advanced_Encryption_Standard

NEW QUESTION 16
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: Use strongly typed members.
Process Order objects in first-in-first-out order. Store values for each Order object.
Use zero-based indices.
You need to use a collection type that meets the requirements. Which collection type should you use?

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

Answer: A

Explanation: Queues are useful for storing messages in the order they were received for sequential processing. Objects stored in a Queue<T> are inserted at one end and removed from the other.
Reference: http://msdn.microsoft.com/en-us/library/7977ey2c.aspx