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Microsoft TS: Accessing Data with Microsoft .NET Framework 4 Sample Questions:

1. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You use the ADO.NET Entity Framework to model entities. The application connects to a Microsoft SQL
Server database named AdventureWorks.
The application includes the following code segment. (Line numbers are included for reference only.)
01 using (AdventureWorksEntities context = new AdventureWorksEntities())
02 {
03 ObjectQuery <SalesOrderHeader> orders = context.SalesOrderHeader.
Where("it.CreditCardApprovalCode IS NULL").Top("100"); 04 foreach (SalesOrderHeader order in orders){ 05 order.Status = 4; 06 } 07 try{ 08 context.SaveChanges(); 09 } 10 catch (OptimisticConcurrencyException){ 11 ... 12 } 13 }
You need to resolve any concurrency conflict that can occur. You also need to ensure that local changes
are persisted to the database.
Which code segment should you insert at line 11?

A) context.Refresh(RefreshMode.StoreWins, orders); context.SaveChanges();
B) context.Refresh(RefreshMode.StoreWins, orders); context.AcceptAllChanges();
C) context.Refresh(RefreshMode.ClientWins, orders); context.SaveChanges();
D) context.Refresh(RefreshMode.ClientWins, orders); context.AcceptAllChanges();

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server database.
The application uses a DataTable named OrderDetailTable that has the following columns:
-ID
-OrderID
-ProductID
-Quantity
-LineTotal
Some records contain a null value in the LineTotal field and 0 in the Quantity field. You write the following code segment. (Line numbers are included for reference only.)
01 DataColumn column = new DataColumn("UnitPrice", typeof(double));
02 ...
03 OrderDetailTable.Columns.Add(column);
You need to add a calculated DataColumn named UnitPrice to the OrderDetailTable object.
You also need to ensure that UnitPrice is set to 0 when it cannot be calculated.
Which code segment should you insert at line 02?

A) column.Expression = "LineTotal/ISNULL(Quantity, 1)";
B) column.Expression = "if(Quantity > 0, LineTotal/Quantity, 0)";
C) column.Expression = "LineTotal/Quantity";
D) column.Expression = "iif(Quantity > 0, LineTotal/Quantity, 0)";

3. You use Microsoft Visual Studio 2010 and Microsoft. NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server database. You use Entity SQL of the ADO.NET Entity
Framework to retrieve data from the database.
You need to define a custom function in the conceptual model. You also need to ensure that the function
calculates a value based on properties of the object.
Which two XML element types should you use? (Each correct answer presents part of the solution. Choose
two.)

A) DefiningExpression
B) FunctionImport
C) Function
D) Association
E) Dependent

4. The application user interface displays part names or color names in many plases as '## Name ##'.
You need to provide a method named FormattedName() to format part names and color names throughout
the
application. What should you do?

A) Add the following code segment to the ExtensionMethods class in ExtensionMethods.cs:
public static string FormattedName (this Part entity){
return string.Format("## {0} ##", entity.Name)
}
B) Add the following code segmend to the Color class in Color.cs:
public string FormattedName(){
return string.Format("## {0} ##", this.Name);
}
C) Add the following code segmend to the Part class in Part.cs:
public string FormattedName(){
return string.Format("## {0} ##", this.Name);
}
D) Add the following code segment to the ExtensionMethods class in ExtensionMethods.cs:
public static string FormattedName (this Color entity){
return string.Format("## {0} ##", entity.Name)
}
E) Add the following code segment to the ExtensionMethods class in ExtensionMethods.cs:
public static string FormattedName (this IName entity){
return string.Format("## {0} ##", entity.Name)
}

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You use a TableAdapter object to load a DataTable object.
The DataTable object is used as the data source for a GridView control to display a table of customer
information on a Web page.
You need to ensure that the application meets the following requirements:
-Load only new customer records each time the page refreshes.
-Preserve existing customer records. What should you do?

A) Set the ClearBeforeFill property of the TableAdapter to false. Use the Fill method of the TableAdapter.
B) Set the ClearBeforeFill property of the TableAdapter to true. Use the Fill method of the TableAdapter to load additional customers.
C) Set the ClearBeforeFill property of the TableAdapter to true. Use the GetData method of the TableAdapter to create a new DataTable.
D) Set the ClearBeforeFill property of the TableAdapter to false. Use the GetData method of the TableAdapter to create a new DataTable.

Solutions: