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Exam : Microsoft 70-320
Title : DEV XML WEB SERV&SER COMP W/MS C#.NET&MS.NET FRAMEWORK


1. You have a strongly typed DataSet object named myDataSet. This object contains three DataTable objects named Customers, Orders, and OrderDetails.
Customers and Orders have a data column named CustomerID. Orders and OrderDetails have a data column named OrderID.
Orders has a foreign key constraint between Customers and Orders on CustomerID. OrderDetails has a foreign key constraint between Orders and OrderDetails on OrderID.
You want to populate Customers, Orders, and OrderDetails with data from a Microsoft SQL Server database.
In which order should you fill the DataTable objects?
A. Customers
　OrderDetails
　Orders
B. OrderDetails
　Orders
　Customers
C. Customers
　Orders
　OrderDetails
D. Orders
　OrderDetails
　Customers
Answer: C

2. You are developing an order-processing application that retrieves data from a Microsoft SQL Server database. The database contains a table named Customers and a table named Orders.
Customers has a primary key of CustomerID. Each row in Orders has a CustomerID that indicates which customer placed the order.
Your application uses a DataSet object named ordersDataSet to capture customer and order information before it is applied to the database. The ordersDataSet object has two DataTable objects named Customers and Orders.
You want to ensure that a row cannot exist in the Orders DataTable object without a matching row existing in the Customers DataTable object.
Which two actions should you take? (Each correct answer presents part of the solution. Choose two.)
A. Create a foreign key constraint named ConstraintOrders that has Orders.CustomerID as the parent column and Customers.CustomerID as
the child column.
B. Create a foreign key constraint named ConstraintCustomers that has Customers.CustomerID as the parent column and Orders.CustomerID
as the child column.
C. Create a unique constraint named UniqueCustomers by using the Customers.CustomerID.
D. Add ConstraintOrders to the Orders DataTable.
E. Add ConstraintOrders to the Customers DataTable.
F. Add ConstraintCustomers to the Orders DataTable.
G. Add ConstraintCustomers to the Customers DataTable.
H. Add UniqueCustomers to the Customers DataTable.
Answer: BF

3. Your Microsoft SQL Server database contains a table named Regions. Regions contains all the sales regions for a sales-tracking application. You create a DataSet object named regionsDataSet by using a SqlDataAdapter object named myDataAdapter. This object uses a single SQL SELECT statement to populate the regionsDataSet. You bind regionsDataSet to a DataGrid object named regionsDataGrid to display the contents of Regions. You now want to use the same regionsDataSet, myDataAdapter, and regionsDataGrid to insert, update, and delete data in Regions. You want to accomplish this task by writing the minimum amount of code. What should you do?
A. Instantiate a SqlCommandBuilder object that has myDataAdapter as a constructor argument.
Add an Update button to the form and add code to the Click event to update regionsDataSet by using myDataAdapter.
B. Instantiate a SqlCommandBuilder object that has myDataAdapter as a constructor argument.
Create one stored procedure for each of the insert, update, and delete functions and associate the stored procedures with the
InsertCommand, UpdateCommand, and DeleteCommand properties of myDataAdapter.
Add an Update button to the form and add code to the Click event to update regionsDataSet by using myDataAdapter.
C. Create one stored procedure for each of the insert, update, and delete functions and associate the stored procedures with the
InsertCommand, UpdateCommand, and DeleteCommand properties of myDataAdapter.
Add an Update button to the form and add code to the Click event to update regionsDataSet by using myDataAdapter.
D. Create one SQL string for each of the insert, update, and delete functions and associate the SQL strings with the InsertCommand,
UpdateCommand, and DeleteCommand properties of myDataAdapter.
Add an Update button to the form and add code to the Click event to update regionsDataSet by using myDataAdapter.
Answer: A

4. You create an XML Web service that retrieves data from a Microsoft SQL Server database. You instantiate a SqlConnection object named myConnection and set the Max Pool Size property of the connectionString to 50.
All 50 connections are now in use. However, a request for connection number 51 is received.
What is the most likely result?
A. An exception is immediately thrown.
B. The current connection pool is expanded by 50 additional connections.
C. A new connection pool is created that has the same maximum number of connections.
D. The request is queued until a connection becomes available or until the timeout limit is reached.
Answer: D

5. You have a DataSet object named ordersDataSet. This object contains two DataTable objects named Orders and OrderDetails. Both Orders and OrderDetails contain a column named OrderID.
You create a DataRelation object named orderRelation between Orders and OrderDetails on OrderID. Orders is the parent table. OrderDetails is the child table.
You add orderRelation to the ordersDataSet relation collection by using the following line of code:
ordersDataSet.Relations.Add(orderRelation);
You verify that prior to adding orderRelation, there were no constraints on either table. You then run the line of code.
How many constraints does each table have now?
A. one on Orders; none on OrderDetails
B. none on Orders; one on OrderDetails
C. none on Orders; none on OrderDetails
D. one on Orders; one on OrderDetails
Answer: D

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