70-293 Latest Dumps UPDATED ON 13th APRIL 2008 .vce format

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QUESTION 1
You develop a Windows-Based application that accesses a Microsoft SQL Server
database named Certkiller 1. Users must supply a user name and password when
they start the application. This information is then used to dynamically build a
connection string.
When you test the application, you discover that it is not using the SqlClient
connection pooling feature.
You must reduce the time needed to retrieve information.
How should you modify the connection string?
A. to use the Windows user logon when connection to the Certkiller 1 database.
B. to use the SQL Server used login when connection to the Certkiller 1 database.
C. to use the same application logon ID and password for every connection to the
Certkiller 1 database.
D. to use the guest login ID and password for every connection to the Certkiller 1
database.
Answer: C
Explanation: We must use the same connection string to only use one connection
pool.
Note: The performance of the application can be enhanced by having the application
share, or “pool,” connections to the data source. When a connection is opened, a
connection pool is created based on an exact matching algorithm that associates the pool

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with the connection string in the connection. Each connection pool is associated with a
distinct connection string. When a new connection is opened, if the connection string is
not an exact match to an existing pool, a new pool is created.
Reference:
.NET Framework Developer’s Guide, Connection Pooling for the SQL Server .NET Data
Provider
Visual Basic and Visual C# Concepts, Introduction to ADO.NET Connection Design
Tools
Incorrect Answers
A, C: If we use different connection strings for different users we would not be using the
same connection pool.
D: Using the guest login ID is not good out of security reasons.
QUESTION 2
You use Visual Studio .NET to develop a Windows-based application that interacts
with a Microsoft SQL Server database. Your application contains a form named
CustomerFarm. You add the following design-time components to the form:
1. SqlConnection object named Certkiller Connection
2. SqlDataAdapter object named Certkiller DataAdapter.
3. DataSet object named Certkiller DataSet.
4. Five TextBox controls to hold the values exposed by Certkiller DataSet.
At design time, you set the DataBindings properties of each TextBox controls to the
appropriate column in the DataTable object of Certkiller DataSet. When you test the
application, you can successfully connect to the database. However, no data is
displayed in any text boxes.
You need to modify your application code to ensure that data is displayed
appropriately. Which behavior should occur while the CustomerForm.Load event
handler is running?
A. Execute the Add method of the TextBoxes DataBindings collection and pass in
Certkiller DataSet.
B. Execute the BeginInit method of Certkiller DataSet.
C. Execute the Open method of Certkiller Connection.
D. Execute the FillSchema method of Certkiller DataAdapter and pass in
Certkiller DataSet.
E. Execute the Fill method of Certkiller DataAdapter and pass in Certkiller DataSet.
Answer: E
Explanation: Dataset is a container; therefore, you need to fill it with data. You can
populate a dataset by calling the Fill method of a data adapter.
Reference: Visual Basic and Visual C# Concepts, Introduction to Datasets
QUESTION 3

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You are maintaining a Visual Studio .Net application that was developed by a
colleague at Certkiller inc. The application calculates interest and penalties for
financial transactions. All variables that contain financial data are defined as type
Double.
When users enter financial data, the application periodically fails during execution.
Failure occurs in response to a variety of actions. The application returns the
following error message: “Arithmetic operation resulted in an overflow”
You need to identify as many potential exceptions as possible in the application
code.
What should you do?
A. Set Option Explicit to On.
B. Set Option Explicit to Off.
C. Set Option Strict to On.
D. Set Option Strict to Off.
E. Set Option Compare to Binary.
F. Set Option Compare to Text.
Answer: C
Explanation: The Options Strict statement concerns which conversion are allowed.
Option Strict ON disallows any data type conversions in which data loss would
occur and any conversion between numeric types and strings. In short it helps to
identify potential arithmetic exceptions.
Reference:
Visual Basic Language Reference, Option Strict Statement
Visual Basic Compiler Options, /optionexplicit
Visual Basic Language Reference, Option Compare Statement
Incorrect Answers
A: The /optionexplicit causes the compiler to report errors if variables are not declared
prior to use. It would not help finding potential exceptions however.
B: Disabling variable declaration checking will not help finding exceptions.
D: Setting Options Strict to Off
disables type conversion checks. We should enable these checks.
E, F: The Option Compare statement is used at file level to declare the default
comparison method to use when string data is compared. This setting would not help
finding exceptions.
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