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[Free] Get all latest Microsoft 70-483 Actual Tests 161-170

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QUESTION 161

You are developing an application that uses multiple asynchronous tasks to optimize performance. You need to retrieve the result of an asynchronous task. Which code segment should you use?

 

clip_image001

 

A.

Option A

B.

Option B

C.

Option C

D.

Option D

 

Correct Answer: C

 

 

QUESTION 162

You are developing an application.

 

The application contains the following code:

 

clip_image002

 

When you compile the code, you receive the following syntax error message: “A previous catch clause already catches all exceptions of this or a super type (‘System.Exception’).”

 

You need to ensure that the code can be compiled. What should you do?

 

A.

Catch the ArgumentException exception instead of the ArgumentNullException exception.

B.

Throw a new exception in the second catch block.

C.

Catch the ArgumentNullException exception first.

D.

Re-throw the exception caught by the second catch block.

 

Correct Answer: A

 

 

 

 

 

QUESTION 163

You are developing an application that includes a method named SendMessage.

 

You need to ensure that the SendMessage() method is called with the required parameters.

 

Which two code segments can you use to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

 

clip_image004

 

A.

Option A

B.

Option B

C.

Option C

D.

Option D

 

Correct Answer: CD

Explanation:

D: ExpandoObject

Represents an object whose members can be dynamically added and removed at run time. / The ExpandoObject class enables you to add and delete members of its instances at run time and also to set and get values of these members. This class supports dynamic binding, which enables you to use standard syntax like sampleObject.sampleMember instead of more complex syntax like sampleObject.GetAttribute(“sampleMember”). / You can pass instances of the ExpandoObject class as parameters. Note that these instances are treated as dynamic objects in C# and late-bound objects in Visual Basic. This means that you do not have IntelliSense for object members and you do not receive compiler errors when you call non-existent members. If you call a member that does not exist, an exception occurs.

 

Note:

* Visual C# 2010 introduces a new type, dynamic. The type is a static type, but an object of type dynamic bypasses static type checking. In most cases, it functions like it has type object. At compile time, an element that is typed as dynamic is assumed to support any operation. Therefore, you do not have to be concerned about whether the object gets its value from a COM API, from a dynamic language such as IronPython, from the HTML Document Object Model (DOM), from reflection, or from somewhere else in the program. However, if the code is not valid, errors are caught at run time.

 

 

QUESTION 164

You have an application that accesses a Web server named Server1. You need to download an image named Imagel.jpg from Server1 and store the image locally as Filel.jpg. Which code should you use?

 

clip_image006

 

A.

Option A

B.

Option B

C.

Option C

D.

Option D

 

Correct Answer: C

QUESTION 165

You are developing a C# application. The application references and calls a RESTful web service named EmployeeService. The EmployeeService web service includes a method named GetEmployee, which accepts an employee ID as a parameter. The web service returns the following JSON data from the method.

 

{“Id”:1,”Name”:”David Jones”>

 

The following code segment invokes the service and stores the result:

 

clip_image008

 

You need to convert the returned JSON data to an Employee object for use in the application.

 

Which code segment should you use?

 

clip_image010

 

A.

Option A

B.

Option B

C.

Option C

D.

Option D

 

Correct Answer: C

 

 

QUESTION 166

You are developing an assembly. You plan to sign the assembly when the assembly is developed. You need to reserve space in the assembly for the signature. What should you do?

 

A.

Run the Assembly Linker tool from the Windows Software Development Kit (Windows SDK).

B.

Run the Strong Name tool from the Windows Software Development Kit (Windows SDK).

C.

Add the AssemblySignatureKeyAttribute attribute the assembly.

D.

Add the AssemblyDelaySignAttribute attribute to the assembly.

 

Correct Answer: D

 

 

QUESTION 167

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

 

clip_image011

 

You need to ensure that if an exception occurs, the exception will be logged.

 

Which code should you insert at line 28?

 

clip_image012

 

A.

Option A

B.

Option B

C.

Option C

D.

Option D

 

Correct Answer: A

Explanation:

* XmlWriterTraceListener

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

 

 

QUESTION 168

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.)

 

clip_image013

 

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();

 

Correct 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

 

 

QUESTION 169

You write the following method (line numbers are included for reference only):

 

clip_image014

 

You need to ensure that the method extracts a list of URLs that match the following pattern:

@http://(www.)?([^.]+).com;

 

Which code should you insert at line 07?

 

clip_image015

 

A.

Option A

B.

Option B

C.

Option C

D.

Option D

 

Correct Answer: A

Explanation:

* 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>.

Incorrect:

Not D: ICollection.SyncRoot Property

For collections whose underlying store is not publicly available, the expected implementation is to return the current instance. Note that the pointer to the current instance might not be sufficient for collections that wrap other collections; those should return the underlying collection’s SyncRoot property.

 

 

QUESTION 170

You have the following code:

 

clip_image016

 

You need to retrieve all of the numbers from the items variable that are greater than 80.

 

Which code should you use?

 

clip_image017

 

A.

Option A

B.

Option B

C.

Option C

D.

Option D

 

Correct Answer: B

Explanation:

Enumerable.Where<TSource> Method (IEnumerable<TSource>, Func<TSource, Boolean>)

Filters a sequence of values based on a predicate.

 

Example:

List<string> fruits =

new List<string> { “apple”, “passionfruit”, “banana”, “mango”, “orange”, “blueberry”, “grape”, “strawberry” };

 

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

 

foreach (string fruit in query)

{

Console.WriteLine(fruit);

}

/*

 

This code produces the following output:

 

apple

mango

grape

*/

 

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