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Microsoft 70-516 Exam Syllabus Topics:

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

1. You add a table to the database to track changes to part names. The table stores the following row values:
-the username of the user who made the change
-a part ID
-the new part name
-a DateTime value
You need to ensure detection of unauthorized changes to the row values.
You also need to ensure that database users can view the original row values.

A) Use System.Security.Cryptography.DES to encrypt all the row values using an encryption key held by the application.
B) Add a column named signature. Use System.Security.Cryptography.RSA to create a signature for all of the row values. Store the signature in the signature column. Publish only the public key internally.
C) Add a column named hash. Use System.Security.Cryptography.MD5 to create an MD5 hash of the row values, and store in the hash column.
D) Use System.Security.Cryptography.RSA to encrypt all the row values. Publish only the key internally.

2. The application populates a DataSet object by using a SqlDataAdapter object.
You use the DataSet object to update the Categories database table in the database. You write the
following code segment.
(Line numbers are included for reference only.)
01 SqlDataAdapter dataAdpater = new SqlDataAdapter("SELECT CategoryID,
CategoryName FROM Categories", connection);
02 SqlCommandBuilder builder = new SqlCommandBuilder(dataAdpater);
03 DataSet ds = new DataSet();
04 dataAdpater.Fill(ds);
05 foreach (DataRow categoryRow in ds.Tables[0].Rows)
06 {
07 if (string.Compare(categoryRow["CategoryName"].ToString(), searchValue,
true) == 0)
08 {
09 ...
10 }
11 }
12 dataAdpater.Update(ds);
You need to remove all the records from the Categories database table that match the value of the
searchValue variable.
Which line of code should you insert at line 09?

A) ds.Tables[0].Rows.RemoveAt(0);
B) ds.Tables[0].Rows[categoryRow.GetHashCode()].Delete();
C) categoryRow.Delete();
D) ds.Tables[0].Rows.Remove(categoryRow);

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses the EntityFramework.
The application has an entity named Person. A Person instance named person1 and an ObjectContext
instance named model exist.
You need to delete the person1 instance. Which code segment should you use?

A) model.ExecuteStoreCommand("Delete", new []{new ObjectParameter("Person", person1)}; model.SaveChanges();
B) model.DeleteObject(person1); model.SaveChanges();
C) model.Detach(person1); model.SaveChanges();
D) model.ExecuteStoreCommand("Detach", new []{new ObjectParameter("Person", person1)}; model.SaveChanges();

4. 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 has two DataTable objects that reference the Customers and Orders tables in the
database.
The application contains the following code segment. (Line numbers are included for reference only.)
01 DataSet customerOrders = new DataSet();
02 customerOrders.EnforceConstraints = true;
03 ForeignKeyConstraint ordersFK = new ForeignKeyConstraint("ordersFK",
04 customerOrders.Tables
["Customers"].Columns["CustomerID"],
05 customerOrders.Tables["Orders"].Columns
["CustomerID"]);
06 ...
07 customerOrders.Tables["Orders"].Constraints.Add(ordersFK);
You need to ensure that an exception is thrown when you attempt to delete Customer records that have
related Order records.
Which code segment should you insert at line 06?

A) ordersFK.DeleteRule = Rule.Cascade;
B) ordersFK.DeleteRule = Rule.SetNull;
C) ordersFK.DeleteRule = Rule.SetDefault;
D) ordersFK.DeleteRule = Rule.None;

5. How do you define a WCF Data Service query to grab the first 10 records. Options are something like:

A) DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$expand", "10");
B) DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$top", "10");
C) DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$select", "10");
D) DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$filter", "10");

Solutions: