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Q76. - (Topic 1) 

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 TaskCompletionSource<T> object and call the TrySetException() method of the object. 

B. Create a task by calling the Task.ContinueWith() method. 

C. Examine the Task.Status property immediately after the call to the Task.Run() method. 

D. Create a task inside the existing Task.Run() method by using the AttachedToParent option. 

Answer: B 

Q77. - (Topic 2) 

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 

Answer: B 

Explanation: * 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 

) 

Q78. DRAG DROP - (Topic 1) 

You are implementing a method that creates an instance of a class named User. The User class contains a public event named Renamed. The following code segment defines the Renamed event: 

Public event EventHandler<RenameEventArgs> Renamed; 

You need to create an event handler for the Renamed event by using a lambda expression. 

How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations 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.) 

Answer: 

Q79. DRAG DROP - (Topic 1) 

You are developing a class named ExtensionMethods. 

You need to ensure that the ExtensionMethods class implements the IsEmail() method on string objects. 

How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations 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.) 

Answer: 

Q80. - (Topic 2) 

You are implementing a method named GetValidPhoneNumbers. The GetValidPhoneNumbers() method processes a list of string values that represent phone numbers. 

The GetValidPhoneNumbers() method must return only phone numbers that are in a valid format. 

You need to implement the GetValidPhoneNumbers() method. 

Which two code segments 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 

Answer: A,B 

Explanation: * Regex.Matches Searches an input string for all occurrences of a regular expression and returns all the matches. 

* MatchCollection 

Represents the set of successful matches found by iteratively applying a regular 

expression pattern to the input string. 

The collection is immutable (read-only) and has no public constructor. The Regex.Matches 

method returns a MatchCollection object. 

* List<T>.Add Method 

Adds an object to the end of the List<T>. 

Q81. - (Topic 1) 

You are developing an application by using C#. 

You have the following requirements: 

Support 32-bit and 64-bit system configurations. 

Include pre-processor directives that are specific to the system configuration. 

Deploy an application version that includes both system configurations to testers. 

Ensure that stack traces include accurate line numbers. 

You need to configure the project to avoid changing individual configuration settings every time you deploy the application to testers. 

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

A. Update the platform target and conditional compilation symbols for each application configuration. 

B. Create two application configurations based on the default Release configuration. 

C. Optimize the application through address rebasing in the 64-bit configuration. 

D. Create two application configurations based on the default Debug configuration. 

Answer: B,D 

Q82. HOTSPOT - (Topic 2) 

You have the following code (line numbers are included for reference only): 

To answer, complete each statement according to the information presented in the code. 

Answer: 

Q83. - (Topic 2) 

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 

Answer: A 

Q84. - (Topic 1) 

You are developing an application that uses structured exception handling. The application includes a class named ExceptionLogger. 

The ExceptionLogger class implements a method named LogException by using the following code segment: 

public static void LogException(Exception ex) 

You have the following requirements: . Log all exceptions by using the LogException() method of the ExceptionLogger class. . Rethrow the original exception, including the entire exception stack. You need to meet the requirements. 

Which code segment should you use? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer: A 

Explanation: 

Once an exception is thrown, part of the information it carries is the stack trace. The stack trace is a list of the method call hierarchy that starts with the method that throws the exception and ends with the method that catches the exception. If an exception is re-thrown by specifying the exception in the throw statement, the stack trace is restarted at the current method and the list of method calls between the original method that threw the exception and the current method is lost. To keep the original stack trace information with the exception, use the throw statement without specifying the exception. 

http://msdn.microsoft.com/en-us/library/ms182363(v=vs.110).aspx 

Q85. - (Topic 2) 

You need to store the values in a collection. 

The solution must meet the following requirements: 

. The values must be stored in the order that they were added to the collection. . The values must be accessed in a first-in, first-out order. 

Which type of collection should you use? 

A. SortedList 

B. Queue 

C. ArrayList 

D. Hashtable 

Answer: B 

Q86. - (Topic 2) 

You are troubleshooting an application that uses a class named FullName. The class is decorated with the DataContractAttribute attribute. The application includes the following code. (Line numbers are included for reference only.) 

You need to ensure that the entire FullName object is serialized to the memory stream object. 

Which code segment should you insert at line 09? 

A. binary.WriteEndElement(); 

B. binary.NriteEndDocument(); 

C. ms.Close() ; 

D. binary.Flush(); 

Answer: A 

Explanation: * DataContractSerializer.WriteEndObject Method (XmlDictionaryWriter) Writes the closing XML element using an XmlDictionaryWriter. 

* Note on line 07: DataContractSerializer.WriteObject Method Writes all the object data (starting XML element, content, and closing element) to an XML document or stream. 

XmlDictionaryWriter 

Q87. HOTSPOT - (Topic 2) 

You define a class by using the following code: 

To answer, complete each statement according to the information presented in the code. 

Answer: 

Q88. DRAG DROP - (Topic 1) 

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

You have the following requirements: 

Initialize the _catalog field to a Catalog instance. 

Initialize the _catalog field only once. 

Ensure that the application code acquires a lock only when the _catalog 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.) 

Answer: 

Q89. DRAG DROP - (Topic 1) 

You are developing a class named ExtensionMethods. 

You need to ensure that the ExtensionMethods class implements the IsEmail() extension method on string objects. 

How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations 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.) 

Answer: 

Q90. - (Topic 1) 

You are creating a class named Employee. The class exposes a string property named EmployeeType. The following code segment defines the Employee class. (Line numbers are included for reference only.) 

The EmployeeType property value must meet the following requirements: 

. The value must be accessed only by code within the Employee class or within a class derived from the Employee class. . The value must be modified only by code within the Employee class. 

You need to ensure that the implementation of the EmployeeType property meets the requirements. 

Which two actions should you perform? (Each correct answer represents part of the complete solution. Choose two.) 

A. Replace line 03 with the following code segment: public string EmployeeType 

B. Replace line 06 with the following code segment: protected set; 

C. Replace line 05 with the following code segment: private get; 

D. Replace line 05 with the following code segment: protected get; 

E. Replace line 03 with the following code segment: protected string EmployeeType 

F. Replace line 06 with the following code segment: private set; 

Answer: E,F