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Q:

You are the administrator of a Microsoft Windows NT Server 4.0 computer. The server is the PDC in your domain and also runs SQL Server 2000. The server has four processors and 1 GB of RAM.Your network consists of 500 client computers that are running Microsoft Windows Millennium Edition. Users report that when they log on in the morning their computers respond slowly and occasionally return error messages.You use System Monitor to monitor processor performance and RAM utilization. You discover that the % Total Time and % User Time counters average 90 percent and the % Privileged Time counter averages 20 percent. The Available Mbytes counter averages 800 MB. You need to improve server performance for user logons. What should you do?

A) Increase the physical RAM on the computer to 2 GB. B) Increase the virtual RAM on the computer to 4 GB.
C) Configure SQL Server to use only processors 0, 1, and 2. D) Configure SQL Server to use only processors 1, 2, and 3.
 
Answer & Explanation Answer: D) Configure SQL Server to use only processors 1, 2, and 3.

Explanation:

The system monitor clearly indicates that the processors are overloaded. We need to decide which processors we should use for SQL Server. Processor 0 is the default CPU for the I/O subsystem. Network Interface Cards (NIC) are assigned to the remaining CPUs, starting from the highest-numbered CPU. The NIC would get processor 3.
SQL Server would be using all four processors by default.

The Windows NT/2000/XP operating system use processor 0. In order to avoid the logon
problems we should not let SQL Server to use this processor. Instead SQL Server should be configured to use processor 1, 2, and 3.

Note 1: The Affinity mask is used to exclude a processor on a multiprocessor computer from processing SQL Server 2000 threads. Default is equal distribution of SQL Server 2000 processes across all processors.

Note 2: Monitoring the Processor and System object counters provides information about the CPU utilization and helps in determining whether or not a bottleneck exists. The %Total Processor Time is used on multiple CPU Severs to gauge the average activity of the processors and shows the percentage of elapsed time that a processor is busy executing a nonidle thread. Values around 100 percent on a Server computer that processes many client requests indicate that processes are queuing up, waiting for processor time, and causing a bottleneck. Such a sustained high level of processor usage is unacceptable for a server.

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Q:

You are the administrator of a SQL Server 2000 computer. The server contains a database named FinanceData that is used by a client/server application. Each employee has a SQL Server login that the application uses to access the server.Your company hires a new employee named Andrew. You create a SQL Server login named Andrew. You also create a database user named Andrew in the database and grant the database user full permissions in the database.Whenever Andrew runs the client/server application, he receives the following error message: "Invalid object name." Andrew also reports that he cannot access the database by using the application.You need to ensure that Andrew can use the application. Which Transact-SQL statement should you execute?

A) EXEC sp_defaultdb 'Andrew','FinanceData' B) GRANT ALL ON FinanceData TO Andrew
C) EXEC sp_addlogin 'Andrew' D) EXEC sp_grantdbaccess 'FinanceData','Andrew'GOsp_addrolemember 'db_datareader','Andrew'
 
Answer & Explanation Answer: A) EXEC sp_defaultdb 'Andrew','FinanceData'

Explanation:

Error 208 produces the message 'Invalid object name' and occurs when an object that does not exist in the current database is referenced. If the object exists in another database, we must use the USE statement to explicitly switch the context to the correct database or we must qualify the object name with the database name. A third option is to use the sp_defaultdb stored procedure. This stored procedure is used to change the default database for a login. When a client connects with SQL Server, the default database defined for its login becomes the current database without an explicit USE statement. The default database can be defined when the login is added with
sp_addlogin. When executing sp_addlogin the master database is the default database if a database is not specified. In this scenario a SQL Server 2000 login and a user account has been created for Andrew and he has been given database access and the required permissions.

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Q:

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an
application. You use the ADO.NET Entity Framework to model entities. You write the following code segment. (Line numbers are included for reference only.)


01AdventureWorksEntities context = New AdventureWorksEntities
02
03var q = from c in context.Customers
04where c.City == "London"
05orderby c.CompanyName
06select c;


You need to ensure that the application meets the following requirements: "Compares the current values of unmodified properties with values returned from the data source". Marks the property as modified when the properties are not the same. Which code segment should you insert at line 02?

A) context.MergeOption = MergeOption.AppendOnly; B) context.MergeOption = MergeOption.PreserveChanges;
C) context.MergeOption = MergeOption.OverwriteChanges; D) context.MergeOption = MergeOption.NoTracking;
 
Answer & Explanation Answer: B) context.MergeOption = MergeOption.PreserveChanges;

Explanation:
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Q:

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application uses the ADO.NET Entity Framework to model entities. The application allows users to make changes to entities while disconnected from the central data store.

 

You need to ensure that when the user connects to the central data store and retrieves new data, the application meets the following requirements:

  • Changes made to the local data store in disconnected mode are preserved.
  • Entities that have already been loaded into the local data store, but have not been modified by the user, are updated with the latest data.

What should you do?

A) Call the query's Execute method by using the MergeOptions.AppendOnly option. B) Call the query's Execute method by using the MergeOptions.OverwriteChanges option.
C) Call the Refresh method of ObjectContext by using the RefreshMode.StoreWins option. D) Call the Refresh method of ObjectContext by using the RefreshMode.ClientWins method.
 
Answer & Explanation Answer: D) Call the Refresh method of ObjectContext by using the RefreshMode.ClientWins method.

Explanation:
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Q:

You are creating an ASP.NET page for selling movie tickets. Users select a region, and then they select from a list of cities in that region. The site displays the names and locations of movie theaters in the city selected by the user.


Your company, XYZ Brothers, maintains a list of theaters in a database table that includes the city, name, and street address of each theater. You want to minimize the time required to retrieve and display the list of theater names after a user selects the region and city.

 

 What should you do?

A) Modify the connection string to add the packet size property and set its values to 8192. B) Add the following directive to the page: OutputCache VaryByParam=?
C) Add the following directive to the page: OutputCache VaryByControl=?region;city? D) Modify the connection string to keep your database's connection pool as small as possible.
 
Answer & Explanation Answer: B) Add the following directive to the page: OutputCache VaryByParam=?

Explanation:

You can vary user control output to the cache by specifying the user control name and the parameter. We use the VaryByParam attribute of the  OutputCache  

 

Incorrect Answers: 

 

A: The Packet Size property of the Connection string is the size in bytes of the network packets sed to communicate with an instance of data provider. It is not an optimal property to change to optimize data retrieval.

 

C: The company database does not seem to include a region column.

 

D: If we keep the connection pool small we would allow less simulation connections. However, this would not minimize the required to retrieve and display the data.

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Q:

You are a member of a team of developers creating several ASP.NET applications for XYZ. You want to create a reusable toolbar that will be used in each of the applications. The toolbar will be displayed at the top of each page viewed by the user.


The contents of the toolbar will vary depending on options each user selects when creating a profile.


You want to be able to add the toolbar to the ASP.NET toolbox for each of the developers on your team.What should you do?

A) Create a new Web Control Library project. Create the toolbar within a Web custom control. B) Add a new Web user control to your ASP.NET project. Create the toolbar within the Web user control.
C) Add a new Web Form to your ASP.NET project. Design the toolbar within the Web Form and save the Web Form with an .ascx extension. D) Add a new component class to your ASP.NET project. Design the toolbar within the designer of the component class.
 
Answer & Explanation Answer: A) Create a new Web Control Library project. Create the toolbar within a Web custom control.

Explanation:

Web custom controls are compiled code, which makes them easier to use but more difficult to create. You can add a Web custom control to the Toolbox and display it in a visual designer with full Properties window support and all the other design-time features of ASP.NET server controls. 

 

Incorrect Answers:

B: Web user controls are easy to make, but they can be less convenient to use in advanced scenarios such as this. Because Web user controls are compiled dynamically at run time they cannot be added to the Toolbox


C: A Web form would be inadequate.

 

D: The Component class Provides the base implementation for the IComponent interface and enables object-sharing between applications. It does not fit in this scenario.

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Q:

You create an ASP.NET application to provide corporate news and information to XYZ’s employees. The application is used by employees in New Zealand.


Default.aspx has a Web Form label control named currentDateLabel. The Page.Load event handler for Default.aspx included the following line of code:
currentDateLabel.Text = DateTime.Now.ToString(“D”)


You need to ensure that the data is displayed correctly for employees in New Zealand. What should you do?

A) In the Web.config file for the application, set the culture attribute of the globalization element to en-NZ. B) In the Web.config file for the application, set the uiCulture attribute of the globalization element to en-NZ.
C) In Visual Studio .NET, set the responseEncoding attribute in the page directive for Default.aspx to UTF-8. D) In Visual Studio .NET, save the Default.aspx page for both versions of the application by selecting Advanced Save Options from the File menu and selecting UTF-8.
 
Answer & Explanation Answer: A) In the Web.config file for the application, set the culture attribute of the globalization element to en-NZ.

Explanation:

The culture attribute of the globalization element specifies the default culture for processing incoming Web requests.

 

Incorrect Answers:

 

B: The uiculture attribute of the globalization specifies the default culture for processing locale dependent resource searches. It does not apply in this scenario.

 

C, D: The UTF8Encoding Class class encodes Unicode characters using UCS Transformation Format, 8-bit form (UTF-8). This encoding supports all Unicode character values and surrogates. However, it does not help in displaying data in New Zealand format.

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Q:

You ASP.NET application manages order entry data by using a DataSet object named EXorderEntry. The EXorderEntry object includes two DataTable objects named orderNames and OrderDetails. A ForeignKeyConstraint object named orderDetailsKey is defined between the two DataTable objects.


You attempt to delete a row in orderNames while there are related rows in OrderDetails, and an exception is generated.What is the most likely cause of the problem?

A) The current value of OrderDetails.KeyDeleteRule is Rule.Cascade. B) The current value of OrderDetails.KeyDeleteRule is Rule.SetNull.
C) The current value of OrderDetails.KeyDeleteRule is Rule.SetDefault. D) The current value of OrderDetails.KeyDeleteRule is Rule.None.
 
Answer & Explanation Answer: D) The current value of OrderDetails.KeyDeleteRule is Rule.None.

Explanation:

The rule enumeration indicates the action that occurs when a ForeignKeyConstraint is enforced.None specifies that no action will occur, but exceptions are generated. This is what has occurred in this scenario.

 

Incorrect Answers:

 

A: Cascade specifies that all rows containing that value are also deleted.

B: SetNull specifies that values in all child columns are set to null values.

C: SetDefault specifies that all child columns be set to the default value for the column.

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