Microsoft 70-483 Online Practice Questions and Exam Preparation

Microsoft 70-483 Online Questions & Answers

• Question 61:

  You are developing code for a class named Account. The Account class includes the following method:

  

  You need to ensure that overflow exceptions are thrown when there is an error. Which type of block should you use?

  A. checked
  B. try
  C. using
  D. unchecked
  A. checked

  ---

  C# statements can execute in either checked or unchecked context. In a checked context, arithmetic overflow raises an exception. In an unchecked context, arithmetic overflow is ignored and the result is truncated.

  checked Specify checked context.

  unchecked Specify unchecked context.

  Reference: Checked and Unchecked (C# Reference) https://msdn.microsoft.com/en-us/library/khy08726.aspx

• Question 62:

  You use the Task.Run() method to launch a long-running data processing operation. The data processing operation often fails in times of heavy network congestion.

  If the data processing operation fails, a second operation must clean up any results of the first operation.

  You need to ensure that the second operation is invoked only if the data processing operation throws an unhandled exception.

  What should you do?

  A. Create a task within the operation, and set the Task.StartOnError property to true.
  B. Create a TaskFactory object and call the ContinueWhenAll() method of the object.
  C. Create a task by calling the Task.ContinueWith() method.
  D. Use the TaskScheduler class to create a task and call the TryExecuteTask() method on the class.
  C. Create a task by calling the Task.ContinueWith() method.

  ---

  Task.ContinueWith - Creates a continuation that executes asynchronously when the target Task completes.The returned Task will not be scheduled for execution until the current task has completed, whether it completes due to running to completion successfully, faulting due to an unhandled exception, or exiting out early due to being canceled. http://msdn.microsoft.com/en-us/library/dd270696.aspx

• Question 63:

  You are creating a class library that will be used in a web application. You need to ensure that the class library assembly is strongly named. What should you do?

  A. Use assembly attributes.
  B. Use the csc.exe /target:Library option when building the application.
  C. Use the xsd.exe command-line tool.
  D. Use the EdmGen.exe command-line tool.
  A. Use assembly attributes.

  ---

  The Windows Software Development Kit (SDK) provides several ways to sign an assembly with a strong name:

  *

  (A) Using assembly attributes to insert the strong name information in your code. You can use either the AssemblyKeyFileAttribute or the AssemblyKeyNameAttribute, depending on where the key file to be used is located.

  *

  Using the Assembly Linker (Al.exe) provided by the Windows SDK.

  *

  Using compiler options such /keyfile or /delaysign in C# and Visual Basic, or the /KEYFILE or /DELAYSIGN linker option in C++. (For information on delay signing, see Delay Signing an Assembly.)

• Question 64:

  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 user to the BookTracker instance. What should you do?

  

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

• Question 65:

  HOTSPOT

  You have the following C# code. (Line numbers are included for reference only.)

  

  For each of the following statements, select Yes if the statement is true. Otherwise, select False. NOTE: Each correct selection is worth one point.

  Hot Area:

  

  

• Question 66:

  DRAG DROP

  You have the following code.

  

  You need to complete the method to return the content as a 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 67:

  HOTSPOT

  You have the following code:

  

  For each of the following statements, select Yes if the statement is true. Otherwise, select No.

  Hot Area:

  

  

• Question 68:

  DRAG DROP

  You have a method named GetCustomerIDs that returns a list of integers. Each entry in the list represents a customer ID that is retrieved from a list named Customers. The Customers list contains 1,000 rows.

  Another developer creates a method named ValidateCustomer that accepts an integer parameter and returns a Boolean value. ValidateCustomer returns true if the integer provided references a valid customer. ValidateCustomer can take up

  to one second to run.

  You need to create a method that returns a list of valid customer IDs. The code must execute in the shortest amount of time.

  What should you do? (Develop the solution by selecting and ordering the required code snippets. You may not need all of the code snippets.)

  Select and Place:

  

  

• Question 69:

  You develop an application by using C#. The application counts the number of times a specific word appears within a set of text files. The application includes the following code. (Line numbers are included for reference only.)

  

  You have the following requirements:

  Populate the _wordCounts object with a list of words and the number of occurrences of each word. Ensure that updates to the ConcurrentDictionary object can happen in parallel.

  You need to complete the relevant code.

  Which code segment should you insert at line 23?

  

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

  ---

  The ConcurrentDictionary.AddOrUpdate method adds a key/value pair to the ConcurrentDictionary if the key does not already exist, or updates a key/value pair in the ConcurrentDictionary if the

  key already exists.

  Example:

  // Construct a ConcurrentDictionary

  ConcurrentDictionary cd = new ConcurrentDictionary();

  // Bombard the ConcurrentDictionary with 10000 competing AddOrUpdates Parallel.For(0, 10000, i =>

  {

  // Initial call will set cd[1] = 1.

  // Ensuing calls will set cd[1] = cd[1] + 1

  cd.AddOrUpdate(1, 1, (key, oldValue) => oldValue + 1); });

  Console.WriteLine("After 10000 AddOrUpdates, cd[1] = {0}, should be 10000", cd[1]); Reference: ConcurrentDictionary.AddOrUpdate Method

  https://msdn.microsoft.com/en-us/library/ee378665(v=vs.110).aspx

• Question 70:

  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
  D. Option D

  ---

  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