Microsoft 70-483 Online Practice Questions and Exam Preparation

Microsoft 70-483 Online Questions & Answers

• Question 111:

  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
  D. Option D

  ---

  Incorrect:

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

• Question 112:

  You are developing an application that will transmit large amounts of data between a client computer and a server. You need to ensure the validity of the data by using a cryptographic hashing algorithm. Which algorithm should you use?

  A. DES
  B. HMACSHA512
  C. RNGCryptoServiceProvider
  D. ECDsa
  B. HMACSHA512

  ---

  The HMACSHA512 class computes a Hash-based Message Authentication Code (HMAC) using the SHA512 hash function. Reference: https://msdn.microsoft.com/enus/library/system.security.cryptography.hmacsha512(v=vs.110).aspx

• Question 113:

  DRAG DROP

  You write the following code.

  

  You need to get the list of all the types defined in the assembly that is being executed currently.

  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 114:

  You are developing an application that will transmit large amounts of data between a client computer and a server. You need to ensure the validity of the data by using a cryptographic hashing algorithm. Which algorithm should you use?

  A. RSA
  B. HMACSHA256
  C. Aes
  D. RNGCryptoServiceProvider
  B. HMACSHA256

  ---

  The HMACSHA256 class computes a Hash-based Message Authentication Code (HMAC) by using the SHA256 hash function.

  Reference: https://msdn.microsoft.com/enus/library/system.security.cryptography.hmacsha256(v=vs.110).aspx

• Question 115:

  You are developing a Windows Forms (WinForms) application. The application displays a TreeView that has 1,000 nodes.

  You need to ensure that if a user expands a node, and then collapses the TreeView, the node object is kept in memory unless the Garbage Collector requires additional memory.

  Which object should you use to store the node?

  A. GC
  B. Handle
  C. Cache
  D. Wea kReference
  D. Wea kReference

  ---

  References: https://msdn.microsoft.com/en-us/library/ms404247.aspx

• Question 116:

  You are developing an application that will transmit large amounts of data between a client computer and a server. You need to ensure the validity of the data by using a cryptographic hashing algorithm. Which algorithm should you use?

  A. RSA
  B. Aes
  C. HMACSHA256
  D. DES
  C. HMACSHA256

• Question 117:

  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
  A. Option A
  C. Option C

  ---

  *

  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();

  }

  }

• Question 118:

  You are implementing a new method named ProcessData. The ProcessData() method calls a third-party component that performs a long-running operation to retrieve stock information from a web service.

  The third-party component uses the IAsyncResult pattern to signal completion of the long- running operation so that the UI can be updated with the new values.

  You need to ensure that the calling code handles the long-running operation as a System.Threading.Tasks.Task object to avoid blocking the UI thread.

  Which two actions should you perform? (Each correct answer presents part of the solution.

  Choose two.)

  A. Create a TaskCompletionSource object.
  B. Call the component by using the TaskFactory.FromAsync() method.
  C. Apply the following attribute to the ProcessData() method signature: [Methodlmpl(MethodlmplOptions.Synchronized)]
  D. Apply the async modifier to the ProcessData() method signature.
  A. Create a TaskCompletionSource object.
  B. Call the component by using the TaskFactory.FromAsync() method.

  ---

  A: In many scenarios, it is useful to enable a Task to represent an external asynchronous operation. TaskCompletionSource 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.

  B: 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) Creates a Task that executes an end method action when a specified IAsyncResult completes.

  Note:

  * System.Threading.Tasks.Task

  Represents an asynchronous operation.

• Question 119:

  You have a class named Customer and a variable named customers.

  You need to test whether the customers' variable is a generic list of Customer objects.

  Which line of code should you use?

  

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

• Question 120:

  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. WaitForFullGCComplete()
  B. SuppressFinalize()
  C. WaitForFullGCApproach()
  D. WaitForPendingFinalizers()
  B. SuppressFinalize()

  ---

  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