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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. The application retreives data from Microsoft SQL Server 2008 database named AdventureWorks. The AdventureWorks.dbo.ProductDetails table contains a column names ProductImages that uses a varbinary(max) data type.
You write the following code segment. (Line numbers are included for reference only.)
01 SqlDataReader reader = command.ExecureReader(--empty phrase here --);
02 while(reader.Read())
03 {
04 pubID = reader.GetString(0);
05 stream = new FileStream(...);
06 writer = new BinaryWriter(stream);
07 startIndex = 0;
08 retval = reader.GetBytes(1, startIndex, outByte, 0, bufferSize);
09 while(retval == bufferSize)
10 {
11 ...
12 }
13 writer.Write(outbyte, 0, (int)retval-1);
14 writer.Flush();
15 writer.Close();
16 stream.Close();
17 }
You need to ensure that the code supports streaming data from the ProductImages column. Which code segment should you insert at the empty phrase in line 01?

A) CommandBehavior.KeyInfo
B) CommandBehavior.SingleResult
C) CommandBehavior.Default
D) CommandBehavior.SequentialAccess

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. The application contains the following XML fragment:
<ApplicationMenu> <MenuItem name="File">
<MenuItem name="New">
<MenuItem name="Project" />
<MenuItem name="Web Site" />
</MenuItem>
<MenuItem name="Open">
<MenuItem name="Project" />
<MenuItem name="Web Site" />
</MenuItem>
<MenuItem name="Save" />
</MenuItem>
<MenuItem name="Edit">
<MenuItem name="Cut" />
<MenuItem name="Copy" />
<MenuItem name="Paste" />
</MenuItem>
<MenuItem name="Help">
<MenuItem name="Help" />
<MenuItem name="About" />
</MenuItem> </ApplicationMenu>
The application queries the XML fragment by using the XmlDocument class. You need to select all the descendant elements of the MenuItem element that has its name attribute as File. Which XPath expression should you use?

A) /ApplicationMenu/MenuItem/descendant::MenuItem['File']
B) /ApplicationMenu/MenuItem[@name='File']/descendant::MenuItem
C) //*[@name='File'][name()='MenuItem']
D) /ApplicationMenu/MenuItem['File']//MenuItem

3. You use Microsoft Visual Studio 2010 and .NET Framework 4.0 to develop an application that uses the Entity Data Model for the fallowing database tables.

You need to ensure that the entity that is mapped to the ContectTypeDerived table derives from the entity that is mapped to the ContentTypeBase table. What should you do?

A) Create a complect type for each entity.
B) Use a Table-Per-Hierarchy mapping method.
C) Create a function import for each entity.
D) Use a Table-Per-Type mapping method.

4. 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 service to the following URL: http://contoso.com/
Northwind.svc.
You want to query the WCF Data Services service to retrieve a list of customer objects.
You need to ensure that the query meets the following requirements:
-Only customers that match the following filter criteria are retrieved: City="Seattle" AND Level > 200.
-Data is sorted in ascending order by the ContactName and Address properties. Which URL should you use for the query?

A) http://contoso.com/Northwind.svc/Customers?City=Seattle & Level gt 200 & $orderby=ContactName,Address
B) http://contoso.com/Northwind.svc/Customers?City=Seattle & Level gt 200 & $orderby=ContactName and Address
C) http://contoso.com/Northwind.svc/Customers?$filter=City eq 'Seattle' and Level gt 200 & $orderby=ContactName and Address
D) http://contoso.com/Northwind.svc/Customers?$filter=City eq 'Seattle' and Level gt 200 & $orderby=ContactName,Address

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You create a Database Access Layer (DAL) that is database-independent. The DAL includes the following
code segment.
(Line numbers are included for reference only.)
01 static void ExecuteDbCommand(DbConnection connection)
02 {
03 if (connection != null){
04 using (connection){
05 try{
06 connection.Open();
07 DbCommand command = connection.CreateCommand();
08 command.CommandText = "INSERT INTO Categories (CategoryName)
VALUES ('Low Carb')";
09 command.ExecuteNonQuery();
10 }
11 ...
12 catch (Exception ex){
13 Trace.WriteLine("Exception.Message: " + ex.Message);
14 }
15 }
16 }
17 }
You need to log information about any error that occurs during data access.
You also need to log the data provider that accesses the database. Which code segment should you insert
at line 11?

A) catch (OleDbException ex){ Trace.WriteLine("ExceptionType: " + ex.InnerException.Source);
Trace.WriteLine("Message: " + ex.InnerException.Message);
}
B) catch (DbException ex){ Trace.WriteLine("ExceptionType: " + ex.InnerException.Source);
Trace.WriteLine("Message: " + ex.InnerException.Message);
}
C) catch (OleDbException ex){ Trace.WriteLine("ExceptionType: " + ex.Source);
Trace.WriteLine("Message: " + ex.Message);
}
D) catch (DbException ex){ Trace.WriteLine("ExceptionType: " + ex.Source);
Trace.WriteLine("Message: " + ex.Message);
}

Solutions: