Microsoft 70-483 Online Practice Questions and Exam Preparation

Microsoft 70-483 Online Questions & Answers

• Question 211:

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

  

  You need to ensure that the DoWork(Widget widget) method runs. With which code segment should you replace line 24?

  A. DoWork((Widget)o);
  B. DoWork(new Widget(o));
  C. DoWork(o is Widget);
  D. DoWork((ItemBase)o);
  A. DoWork((Widget)o);

• Question 212:

  You develop a class named MyClass. MyClass has a method that uses a COM object.

  You need to ensure that when MyClass is instantiated by using the using keyword, the COM object is released at the end of the using scope.

  Which interface should you implement?

  A. ISerializable
  B. IDisposable
  C. ICloneable
  D. IFormattable
  B. IDisposable

  ---

  Reference: https://msdn.microsoft.com/en-us/library/system.idisposable(v=vs.110).aspx

• Question 213:

  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.)

  Select and Place:

  

  

• Question 214:

  DRAG DROP

  You are adding a method to an existing application. The method uses an integer named statusCode as an input parameter and returns the status code as a string.

  The method must meet the following requirements:

  

  Return "Error" if the statusCode is 0.

  

  Return "Success" if the statusCode is 1.

  

  Return "Unauthorized" if the statusCode is any value other than 0 or l.

  You need to implement the method 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.)

  Select and Place:

  

  

• Question 215:

  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
  A. Option A

  ---

  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

• Question 216:

  You are implementing a method named ProcessData that performs a long-running task. The ProcessData() method has the following method signature:

  public void ProcessData(List values, CancellationTokenSource source, CancellationToken token)

  If the calling code requests cancellation, the method must perform the following actions:

  Cancel the long-running task.

  Set the task status to TaskStatus.Canceled.

  You need to ensure that the ProcessData() method performs the required actions. Which code segment should you use in the method body?

  A. if (token.IsCancellationRequested) return;
  B. throw new AggregateException();
  C. token.ThrowIfCancellationRequested();
  D. source.Cancel();
  C. token.ThrowIfCancellationRequested();

  ---

  The CancellationToken.ThrowIfCancellationRequested method throws a OperationCanceledException if this token has had cancellation requested.

  This method provides functionality equivalent to:

  C#

  if (token.IsCancellationRequested)

  throw new OperationCanceledException(token);

  Reference: CancellationToken.ThrowIfCancellationRequested Method ()

  https://msdn.microsoft.com/enus/library/system.threading.cancellationtoken.throwifcancellationrequested(v=vs.110).aspx

• Question 217:

  DRAG DROP

  You are developing a C# application. The application includes a class named Rate. The following code segment implements the Rate class:

  

  You define a collection of rates named rateCollection by using the following code segment:

  Collection rateCollection = new Collection() ;

  The application receives an XML file that contains rate information in the following format:

  

  You need to parse the XML file and populate the rateCollection collection with Rate objects. 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 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.)

  Select and Place:

  

  

• Question 218:

  You have the following code (line numbers are included for reference only): You need to ensure that new instances of Connection can be created only by other classes by calling the Create method. The solution must allow classes to inherit from Connection. What should you do?

  

  

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

  ---

  The following list provides the main features of a static class:

  *

  Contains only static members.

  *

  Cannot be instantiated.

  *

  Is sealed.

  *

  Cannot contain Instance Constructors.

  Creating a static class is therefore basically the same as creating a class that contains only static members and a private constructor. A private constructor prevents the class from being instantiated.

  Incorrect:

  Not A: An abstract method is a method that is declared without an implementation. Not C: Private methods can be called from derived classes.

  Reference: Static Classes and Static Class Members (C# Programming Guide)

  https://msdn.microsoft.com/en-us/library/79b3xss3.aspx

• Question 219:

  You are developing an application by using C#. The application includes the following code segment. (Line numbers are included for reference only.)

  

  The DoWork() method must not throw any exceptions when converting the obj object to the IDataContainer interface or when accessing the Data property.

  You need to meet the requirements. Which code segment should you insert at line 07?

  A. var dataContainer = (IDataContainer)obj;
  B. dynamic dataContainer = obj;
  C. var dataContainer = obj is IDataContainer;
  D. var dataContainer = obj as IDataContainer;
  D. var dataContainer = obj as IDataContainer;

  ---

  As - The as operator is like a cast operation. However, if the conversion isn't possible, as returns null instead of raising an exception. http://msdn.microsoft.com/en-us/library/cscsdfbt(v=vs.110).aspx

• Question 220:

  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 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())
  B. Insert the following code segment at line 14: sqlConnection.Open();
  D. Insert the following code segment at line 17: while (sqlDataReader.Read())

  ---

  B: SqlConnection.Open - Opens a database connection with the property settings specified by the ConnectionString. Reference: http://msdn.microsoft.com/enus/library/system.data.sqlclient.sqlconnection.open.aspx

  D: SqlDataReader.Read - Advances the SqlDataReader to the next record.

  Reference: http://msdn.microsoft.com/enus/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).