Microsoft 70-483 Online Practice Questions and Exam Preparation

Microsoft 70-483 Online Questions & Answers

• Question 191:

  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:

  Internally store a key and a value for each collection item. Provide objects to iterators in ascending order based on the key. Ensure that item are accessible by zero-based index or by key.

  You need to use a collection type that meets the requirements.

  Which collection type should you use?

  A. LinkedList
  B. Queue
  C. Array
  D. HashTable
  E. SortedList
  E. SortedList

  ---

  SortedList - Represents a collection of key/value pairs that are sorted by key based on the associated IComparer implementation. http://msdn.microsoft.com/en-us/library/ms132319.aspx

• Question 192:

  DRAG DROP You are developing an application that includes a class named Warehouse. The Warehouse class includes a static property named Inventory- The Warehouse class is defined by the following code segment. (Line numbers are included for reference only.)

  

  You have the following requirements:

  Initialize the _inventory field to an Inventory instance.

  Initialize the _inventory field only once.

  Ensure that the application code acquires a lock only when the _inventory object must be instantiated.

  You need to meet the requirements.

  Which three code segments should you insert in sequence at line 09? (To answer, move the appropriate code segments from the list of code segments to the answer area and arrange them in the correct order.)

  Select and Place:

  

  

• Question 193:

  You are creating a class by using C#. The class will manage writing log entries to a file. You have the following code. (Line numbers are included for reference only.)

  

  c19 if (disposing)

  c20 {

  c21 log.Flush();

  c22 log.Dispose();

  c23 }

  c24

  c25 }

  c26 public void Dispose()

  c27 {

  c28 Dispose(true);

  c29 GC.SupressFinalize(this);

  c30 }

  c31 }

  You test the class by using the following code.

  

  When you run the text, you receive the following error message: "System.ObjectDisposedException: ‘Cannot write to a closed TextWritter."

  You need to ensure that LogWriter closes the log file properly without raising an exception.

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

  NOTE: Each correct selection is worth one point.

  A. Add bool disposed=false; at line c06.
  B. Change line c19 to if(disposed).
  C. Add if (disposed) return; at line c18.
  D. Remove line t05.
  E. Add disposed=true; at line c24.
  F. Remove line c21.
  A. Add bool disposed=false; at line c06.
  C. Add if (disposed) return; at line c18.
  E. Add disposed=true; at line c24.

  ---

  References: https://docs.microsoft.com/en-us/dotnet/standard/design-guidelines/dispose-pattern

• Question 194:

  You are developing a method named CreateCounters that will create performance counters for an application. The method includes the following code. (Line numbers are included for reference only.)

  

  You need to ensure that Counter1 is available for use in Windows Performance Monitor (PerfMon). Which code segment should you insert at line 16?

  A. CounterType = PerformanccCounterType.RawBase
  B. CounterType = PerformanceCounterType.AverageBase
  C. CounterType = PerformanceCounterType.SampleBase
  D. CounterType = PerformanceCounterType.CounterMultiBase
  C. CounterType = PerformanceCounterType.SampleBase

  ---

  PerformanceCounterType.SampleBase - A base counter that stores the number of sampling interrupts taken and is used as a denominator in the sampling fraction. The sampling fraction is the number of samples that were 1 (or true) for a sample interrupt. Check that this value is greater than zero before using it as the denominator in a calculation of SampleFraction.

  PerformanceCounterType.SampleFraction - A percentage counter that shows the average ratio of hits to all operations during the last two sample intervals. Formula: ((N 1 - N 0) / (D 1 - D 0)) x 100, where the numerator represents the number of successful operations during the last sample interval, and the denominator represents the change in the number of all operations (of the type measured) completed during the sample interval, using counters of type SampleBase. Counters of this type include Cache\Pin Read Hits %.

  References: http://msdn.microsoft.com/en-us/library/system.diagnostics.performancecountertype.aspx

• Question 195:

  DRAG DROP

  You have a method that will evaluate a parameter of type Int32 named Status.

  You need to ensure that the method meets the following requirements:

  

  If Status is set to Active, the method must return 1.

  

  If Status is set to Inactive, the method must return 0.

  

  If Status is any other value, the method must return -1.

  What should you do? (To answer, drag the appropriate statement to the correct location 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 196:

  You are creating a console application by using C#.

  You need to access the application assembly. Which code segment should you use?

  A. Assembly.GetAssembly(this);
  B. this.GetType();
  C. Assembly.Load();
  D. Assembly.GetExecutingAssembly();
  D. Assembly.GetExecutingAssembly();

  ---

  Assembly.GetExecutingAssembly - Gets the assembly that contains the code that is currently executing.

  Reference: http://msdn.microsoft.com/enus/library/system.reflection.assembly.getexecutingassembly(v=vs.110).aspx Incorrect: Not A: Assembly.GetAssembly - Gets the currently loaded assembly in which the specified class is defined. http://msdn.microsoft.com/en-us/library/system.reflection.assembly.getassembly.aspx

• Question 197:

  You have the following code (line numbers are included for reference only): You need to ensure that if an exception occurs, the exception will be logged. Which code should you insert at line 28?

  

  

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

  ---

  *

  XmlWriterTraceListener

  Directs tracing or debugging output as XML-encoded data to a TextWriter or to a Stream, such as a FileStream.

  *

  TraceListener.TraceEvent Method (TraceEventCache, String, TraceEventType, Int32) Writes trace and event information to the listener specific output.

  Syntax:

  [ComVisibleAttribute(false)]

  public virtual void TraceEvent(

  TraceEventCache eventCache,

  string source,

  TraceEventType eventType,

  int id

  )

• Question 198:

  You are developing an application that will read data from a text file and display the file contents.

  You need to read data from the file, display it, and correctly release the file resources.

  Which code segment should you use?

  

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

  ---

  The StreamReader object must be part of the using statement.

• Question 199:

  You have the following code:

  

  You need to retrieve all of the numbers from the items variable that are greater than 80. Which code should you use?

  

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

  ---

  Enumerable.Where Method (IEnumerable, Func)

  Filters a sequence of values based on a predicate.

  Example:

  List fruits =

  new List { "apple", "passionfruit", "banana", "mango", "orange", "blueberry", "grape", "strawberry" };

  IEnumerable query = fruits.Where(fruit => fruit.Length < 6);

  foreach (string fruit in query)

  {

  Console.WriteLine(fruit);

  }

  /*

  This code produces the following output:

  apple

  mango

  grape

  */

• Question 200:

  DRAG DROP

  You are developing an application that will include a method named GetData. The GetData() method will retrieve several lines of data from a web service by using a System.IO.StreamReader object.

  You have the following requirements:

  The GetData() method must return a string value that contains the entire response from the web service.

  The application must remain responsive while the GetData() method runs.

  You need to implement the GetData() method.

  How should you complete the relevant code? (To answer, drag the appropriate objects to the correct locations in the answer area. Each object 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: