[Free] New Updated (October) Microsoft 70-483 Real Exam 121-130

Ensurepass

 

QUESTION 121

HOTSPOT

You are building a data access layer in an application that contains the following code:

 

 

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

 

 

Correct Answer:

 

 

QUESTION 122

HOTSPOT

You have the following code:

 

 

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

 

 

Correct Answer:

 

 

QUESTION 123

HOTSPOT

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.

 

 

Correct Answer:

 

 

QUESTION 124

You need to create a method that can be called by using a varying number of parameters. What should you use?

 

A.	method overloading
B.	interface
C.	named parameters
D.	lambda expressions

 

Correct Answer: A

Explanation:

Member overloading means creating two or more members on the same type that differ only in the number or type of parameters but have the same name. Overloading is one of the most important techniques for improving usability, productivity, and readability of reusable libraries. Overloading on the number of parameters makes it possible to provide simpler versions of constructors and methods. Overloading on the parameter type makes it possible to use the same member name for members performing identical operations on a selected set of different types.

QUESTION 125

You are developing an application.

 

The application contains the following code segment (line numbers are included for reference only):

 

 

When you run the code, you receive the following error message: “Cannot implicitly convert type ‘object” to ‘int’. An explicit conversion exists (are you missing a cast?).”

 

You need to ensure that the code can be compiled.

 

Which code should you use to replace line 05?

 

A.	var2 = ((List<int>) array1) [0];
B.	var2 = array1[0].Equals(typeof(int));
C.	var2 = Convert.ToInt32(array1[0]);
D.	var2 = ((int[])array1)[0];

 

Correct Answer: C

Explanation:

Make a list of integers of the array with = ( (List<int>)array1) then select the first item in the list with [0].

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

QUESTION 126

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

 

Correct Answer: B

Explanation:< /p>

* 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 127

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

 

 

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?

 

 

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

 

Correct Answer: D

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 A: 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 128

You are creating a class library that will be used in a web application. You need to ensure that the class library assembly is strongly named. What should you do?

 

A.	Use the gacutil.exe command-line tool.
B.	Use the xsd.exe command-line tool.
C.	Use the aspnet_regiis.exe command-line tool.
D.	Use assembly attributes.

 

Correct Answer: D

Explanation:

The Windows Software Development Kit (SDK) provides several ways to sign an assembly with a strong name:

* Using the Assembly Linker (Al.exe) provided by the Windows SDK.

* Using assembly attributes to insert the strong name information in your code. You can use either the AssemblyKeyFileAttribute or the AssemblyKeyNameAttribute, depending on where the key file to be used is located.

* Using compiler options such /keyfile or /delaysign in C# and Visual Basic, or the /KEYFILE or /DELAYSIGN linker option in C++. (For information on delay signing, see Delay Signing an Assembly.)

Note:

* A strong name consists of the assembly’s identity–its simple text name, version number, and culture information (if provided)–plus a public key and a digital signature. It is generated from an assembly file (the file that contains the assembly manifest, which in turn contains the names and hashes of all the files that make up the assembly), using the corresponding private key. Microsoft?Visual Studio?.NET and other development tools provided in the .NET Framework SDK can assign strong names to an assembly. Assemblies with the same strong name are expected to be identical.

 

 

QUESTION 129

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

 

Correct Answer: B

 

 

 

QUESTION 130

An application is throwing unhandled NullReferenceException and FormatException errors. The stack trace shows that the exceptions occur in the GetWebResult() method.

 

The application includes the following code to parse XML data retrieved from a web service. (Line numbers are included for reference only.)

 

You need to handle the exceptions without interfering with the existing error-handling infrastructure.

 

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

Choose two.)

 

 

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

 

Correct Answer: AC

Explanation:

A: The TryParse method is like the Parse meth

od, except the TryParse method does not throw an exception if the conversion fails. It eliminates the need to use exception handling to test for a FormatException in the event that s is invalid and cannot be successfully parsed.

 

C: UnhandledException event handler

If the UnhandledException event is handled in the default application domain, it is raised there for any unhandled exception in any thread, no matter what application domain the thread started in. If the thread started in an application domain that has an event handler for UnhandledException, the event is raised in that application domain.

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