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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 a Windows
Communication
Foundation (WCF) Data Services service. You deploy the data service to the following URL: http://
contoso.com/Northwind.svc.
You need to update the City property of the Customer record that has its ID value as 123.
You also need to preserve the current values of the remaining properties. Which HTTP request should you
use?

A) PUT /Northwind.svc/Customers(123) Host: contoso.com Accept: application/json { City: 'Seattle' }
B) MERGE /Northwind.svc/Customers(123) Host: contoso.com Accept: application/json { City: 'Seattle' }
C) PUT /Northwind.svc/Customers(123) Host: contoso.com Content-Type: application/json { City: 'Seattle' }
D) MERGE /Northwind.svc/Customers(123) Host: contoso.com
Content-Type: application/json { City: 'Seattle' }

2. You are developing a new feature that displays an auto-complete list to users as the type color names. You
have an
existing ContosoEntities context object named contex.
To support the new feature you must develop code that will accept a string object named text containing a
user's
partial input and will query the Colors database table to retrieve all color names that begin with that input.
You need to create an Entity SQL (ESQL) query to meet the requirement.
The query must not be vulnerable to a SQL injection attack. Which code segment should you use?

A) var parameter = new ObjectParameter("text", text + "%");
var result = context.CreateQuery<string>(
"SELECT VALUE (c.Name) FROM Colors AS c WHERE c.Name LIKE @text",
parameter);
B) var parameter = new ObjectParameter("text", text + "%"); var result = context.CreateQuery<string>(
"SELECT VALUE (c.Name) FROM Colors AS c WHERE c.Name LIKE '@text'", parameter);
C) var parameter = new ObjectParameter("text", HttpUtility.HtmlEncode(text) + "%"); var result = context.CreateQuery<string>(
"SELECT (c.Name) FROM Colors AS c WHERE c.Name LIKE '@text'@, parameter);
D) var parameter = new ObjectParameter("text", text + "%");
var result = context.CreateQuery<string>( "SELECT (c.Name) FROM Colors AS c WHERE c.Name LIKE @text", parameter);

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create a Microsoft ASP.NET
application.
You want to connect the application to a Microsoft SQL Server Express 2008 database named
MyDatabase.
The primary database file is named MyDatabase.mdf and it is stored in the App_Data folder.
You need to define the connection string. Which connection string should you add to the Web.config file?

A) Data Source=.\SQLEXPRESS; AttachDbFilename=|DataDirectory|\MyDatabase.mdf; Integrated Security=True; User Instance=True
B) Data Source=localhost; Initial Catalog=MyDataBase; Integrated Security=SSPI; User Instance=True
C) Data Source=.\SQLEXPRESS; Initial Catalog=MyDataBase; Integrated Security=True; User Instance=True
D) Data Source=.\SQLEXPRESS; AttachDbFilename=|DataDirectory|\App_Data\MyDatabase.mdf; Integrated Security=SSPI; User Instance=True

4. The database contains a table named Categories. The Categories table has a primary key identity column
named CategoryID.
The application inserts new records by using the following stored procedure.
CREATE PROCEDURE dbo.InsertCategory @CategoryName nvarchar(15), @Identity int OUT
AS INSERT INTO Categories (CategoryName) VALUES(@CategoryName) SET @Identity = SCOPE_IDENTITY() RETURN @@ROWCOUNT
You write the following code segment.
SqlDataAdapter adapter = new SqlDataAdapter("SELECT categoryID, CategoryName
FROM dbo.Categories",connection);
adapter.InsertCommand = new SqlCommand("dbo.InsertCategory", connection);
adapter.InsertCommand.CommandType = commandType.StoredProcedure;
adapter.InsertCommand.Parameters.Add(new SqlParameter("@CategoryName",
SqlDbType.NVarChar, 15,"CategoryName"));
You need to retrieve the identity value for the newly created record. Which code segment should you add?

A) SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@CategoryName", SqlDbType.Int); parameter.Direction = ParameterDirection.Output; parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID"); parameter.Direction = ParameterDirection.ReturnValue;
B) SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@CategoryName", SqlDbType.Int); parameter.Direction = ParameterDirection.Output; parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID"); parameter.Direction = ParameterDirection.Output;
C) SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@RowCount", SqlDbType.Int); parameter.Direction = ParameterDirection.ReturnValue; parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID"); parameter.Direction = ParameterDirection.Output;
D) SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@RowCount", SqlDbType.Int);
parameter.Direction = ParameterDirection.Output;
parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID");
parameter.Direction = ParameterDirection.ReturnValue;

5. 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. You write the following code segment. (Line numbers are included for reference only.)
01 public partial class SalesOrderDetail : EntityObject
02 {
03 partial void OnOrderQtyChanging(short value)
04 {
05 ...
06 {
07 ...
08 }
09 }
10 }
You need to find out whether the object has a valid ObjectStateEntry instance. Which code segment should you insert at line 05?

A) if (this.EntityState != EntityState.Modified)
B) if (this.EntityState != EntityState.Unchanged)
C) if (this.EntityState != EntityState.Detached)
D) if (this.EntityState != EntityState.Added)

Solutions: