Microsoft 70-483 Online Practice Questions and Exam Preparation

Microsoft 70-483 Online Questions & Answers

• Question 81:

  You are creating an application that manages information about your company's products. The application includes a class named Product and a method named Save.

  The Save() method must be strongly typed. It must allow only types inherited from the Product class that use a constructor that accepts no parameters.

  You need to implement the Save() method.

  Which code segment should you use?

  

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

  ---

  The condition new() ensures the empty/default constructor and must be the last condition.

  When you define a generic class, you can apply restrictions to the kinds of types that client code can use for type arguments when it instantiates your class. If client code tries to instantiate your class by using a type that is not allowed by a constraint, the result is a compile-time error. These restrictions are called constraints. Constraints are specified by using the where contextual keyword. http://msdn.microsoft.com/en-us/library/d5x73970.aspx

• Question 82:

  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
  C. Option C

• Question 83:

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

  

  The application fails at line 17 with the following error message: "An item with the same key has already been added."

  You need to resolve the error.

  Which code segment should you insert at line 16?

  

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

  ---

  Use if statement with ContainsKey method to check if dictionary already contains the specified key.

  References:

  https://msdn.microsoft.com/en-us/library/kw5aaea4(v=vs.110).aspx

  https://www.c-sharpcorner.com/UploadFile/mahesh/how-to-find-a-key-in-a-dictionary-with-C-Sharp/

• Question 84:

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

  public void ProcessReports(List values,CancellationTokenSource cts, CancellationToken ct)

  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 ProcessReports() method performs the required actions.

  Which code segment should you use in the method body?

  A. if (ct.IsCancellationRequested) return;
  B. ct.ThrowIfCancellationRequested() ;
  C. cts.Cancel();
  D. throw new AggregateException();
  B. ct.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 85:

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

  

  You need to evaluate whether an object is null. Which code segment should you insert at line 03?

  

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

  ---

  Use the == operator to compare values and in this case also use the null literal.

• Question 86:

  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. Solution: You insert the following code at line 02:

  

  Does this meet the goal?

  A. Yes
  B. No
  B. No

• Question 87:

  DRAG DROP

  You need to validate whether string strJson is a valid JSON string.

  

  How should you complete the code? To answer, drag the appropriate code elements to the correct targets in the answer area. Each code element 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 88:

  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.

  Hot Area:

  

  

• Question 89:

  You are developing an application that will manage customer records. The application includes a method named FindCustomer.

  Users must be able to locate customer records by using the customer identifier or customer name.

  You need to implement the FindCustomer() method to meet the requirement.

  Which two sets of method signatures can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

  

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

  ---

  References: https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/classes-and-structs/static-classes-and-static-class-members

• Question 90:

  An application contains code that measures reaction times. The code runs the timer on a thread separate from the user interface. The application includes the following code. (Line numbers are included for reference only.)

  

  You need to ensure that the application cancels the timer when the user presses the Enter key. Which code segment should you insert at line 14?

  A. tokenSource.Token.Register( () => tokenSource.Cancel() );
  B. tokenSource.Cancel();
  C. tokenSource.IsCancellationRequested = true;
  D. tokenSource.Dispose();
  B. tokenSource.Cancel();

  ---

  The CancellationTokenSource.Cancel method communicates a request for cancellation, and specifies whether remaining callbacks and cancelable operations should be processed.

  Incorrect:

  Not C: The IsCancellationRequested property is ReadOnly.

  Reference: CancellationTokenSource.Cancel Method (Boolean)

  https://msdn.microsoft.com/en-us/library/dd321703(v=vs.110).aspx