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Q41. - (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:

Explanation: * XmlWriterTraceListener 

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

such as a FileStream. 


Q42. DRAG DROP - (Topic 1) 

You are testing an application. The application includes methods named CalculateInterest and LogLine. The CalculateInterest() method calculates loan interest. The LogLine() method sends diagnostic messages to a console window. 

You have the following requirements: 

. The CalculateInterest() method must run for all build configurations. 

. The LogLine() method must be called only for debug builds. 

You need to ensure that the methods run correctly. 

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: 


Q43. - (Topic 1) 

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

The DoWork() method must throw an InvalidCastException exception if the obj object is not of type IDataContainer when accessing the Data property. 

You need to meet the requirements. Which code segment should you insert at line 07? 

A. var dataContainer = (IDataContainer) obj; 

B. var dataContainer = obj as IDataContainer; 

C. var dataContainer = obj is IDataContainer; 

D. dynamic dataContainer = obj; 

Answer:

Explanation: 

http://msdn.microsoft.com/en-us/library/ms173105.aspx 


Q44. 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: 


Q45. - (Topic 2) 

You are developing a method named GenerateHash that will create the hash value for a file. The method includes the following code. (Line numbers are included for reference only.) 

You need to return the cryptographic hash of the bytes contained in the fileBuffer variable. Which code segment should you insert at line 05? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:


Q46. - (Topic 1) 

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 

Answer:

Explanation: 

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 


Q47. - (Topic 2) 

You are creating a console application named Appl. 

App1 retrieves data from the Internet by using JavaScript Object Notation (JSON). 

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

You need to ensure that the code validates the JSON string. Which code should you insert at line 03? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Explanation: The JavaScriptSerializer Class Provides serialization and deserialization functionality for AJAX-enabled applications. 

The JavaScriptSerializer class is used internally by the asynchronous communication layer to serialize and deserialize the data that is passed between the browser and the Web server. You cannot access that instance of the serializer. However, this class exposes a public API. Therefore, you can use the class when you want to work with JavaScript Object Notation (JSON) in managed code. 


Q48. - (Topic 1) 

You are developing an application. The application includes classes named Mammal and Animal and an interface named IAnimal. 

The Mammal class must meet the following requirements: . It must either inherit from the Animal class or implement the IAnimal interface. . It must be inheritable by other classes in the application. You need to ensure that the Mammal class meets the requirements. 

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,C 

Explanation: 

When applied to a class, the sealed modifier prevents other classes from inheriting from it. http://msdn.microsoft.com/en-us/library/88c54tsw(v=vs.110).aspx 


Q49. - (Topic 1) 

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

You need to ensure that the application accepts only integer input and prompts the user each time non-integer input is entered. 

Which code segment should you add at line 19? 

A. If (!int.TryParse(sLine, out number)) 

B. If ((number = Int32.Parse(sLine)) == Single.NaN) 

C. If ((number = int.Parse(sLine)) > Int32.MaxValue) 

D. If (Int32.TryParse(sLine, out number)) 

Answer:

Explanation: 

B and C will throw exception when user enters non-integer value. D is exactly the opposite what we want to achieve. 

Int32.TryParse - Converts the string representation of a number to its 32-bit signed integer equivalent. A return value indicates whether the conversion succeeded. http://msdn.microsoft.com/en-us/library/f02979c7.aspx 


Q50. - (Topic 2) 

You are creating a console application named Appl. 

App1 retrieves data from the Internet by using JavaScript Object Notation (JSON). 

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

You need to ensure that the code validates the JSON string. Which code should you insert at line 03? 

A. Option A 

B. Option B 

C. Option C 

D. Option D 

Answer:

Explanation: JavaScriptSerializer().Deserialize 

Converts the specified JSON string to an object of type T. 

Example: 

string json = File.ReadAllText(Environment.CurrentDirectory + @"\\JSON.txt"); 

Company company = new 

System.Web.Script.Serialization.JavaScriptSerializer().Deserialize<Company>( 

Reference: C# - serialize object to JSON format using JavaScriptSerializer 

http://matijabozicevic.com/blog/csharp-net-development/csharp-serialize-object-to-json-format-using-javascriptserialization