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Exam : IBM 000-154
Title : Test 154,web developer


1. When the JMS API is used, which two subtypes of javax.jms.Message are most appropriate for sending a message to a consumer that is not a Java client?
A. BytesMessage
B. MapMessage
C. ObjectMessage
D. StreamMessage
E. TextMessage
Answer: AE

2. Given a JDBC data source named myDataSource, which of the following establishes a JDBC connection?
A. Connection con = new Connection(myDataSource);
B. Connection con = myDataSource.getConnection();
C. Connection con = ConnectionManager.getConnection(myDataSource);
D. Connection con = myDataSource.open();
Answer: B

3. In the JMS API for the publish-subscribe domain, how does a durable subscriber differ from a non-durable subscriber?
A. Messages in topics that have durable subscribers remain in the topic until they expire or the subscriber connection to the JMS provider is closed.
B. If a durable subscriber becomes disconnected without unsubscribing and later reconnects, the subscriber receives messages that arrived while the subscriber was not active.
C. If a topic has a durable subscriber, the JMS provider logs all messages in a persistent media so that an application can inspect the log and extract messages at a later time.
D. The application server delivers each message in a transactional context so that if a durable subscriber then rolls back the transaction, the state of the message reverts to that prior to delivery.
Answer: B

4. Refer to the exhibit to answer the question.
Consider the Products relation defined in the exhibit. What is the result of attempting to execute the following Java code segment assuming con is a valid reference to an open Connection object?
1. PreparedStatement ps = con.prepareStatement(
2. "SELECT * FROM Products WHERE " +
3. "Cost 4.
5. ps.setDouble(0, 10f);
6.
7. ResultSet rs = ps.executeUpdate();
8. rs.next();
9. System.out.print(rs.getString(1));
10. System.out.println(rs.getString(2));
A. The code segment displays "1001 Flyback Transformer".
B. The code segment displays "1004 Grounding Strap".
C. The code segment displays "Flyback Transformer 8.0".
D. The code segment displays "Grounding Strap 0.15".
E. No output is displayed due to a runtime error.
Answer: E

5. When a context throws a NamingException, which of the following methods can be used to determine which portion of the JNDI name is valid?
A. NamingException.resolvedObj()
B. NamingException.remainingName()
C. NamingException.resolvedName()
D. NamingException.getRootCause()
Answer: C

6. Which two of the following are NOT parts of the J2C Version 1.0 Common Client Interface?
A. ConnectionFactory
B. ConnectionException
C. ResultSetMetaData
D. TransactionFactory
E. ResultSet
Answer: BD

7. Which of the following is NOT a message transfer protocol?
A. POP
B. SMTP
C. IMAP
D. MIME
Answer: D

8. Which two of the following scenarios are better modeled in the JMS point-to-point domain than in the JMS publish-subscribe domain?
A. A store sends a shipping order to a warehouse to request delivery of a purchased item to a customer.
B. Headquarters of a chain of stores sends messages that contain price update information to several stores that consume messages independently.
C. Many sports teams post scores so that fans can see the latest results for their favorite teams.
D. A client application sends insurance policy data to an application that calculates insurance premiums, and waits for the response.
Answer: AD

9. Refer to the exhibit to answer the question.
Consider the Employees relation defined in the exhibit and the Java code segment defined below:
Statement s = con.createStatement();
ResultSet rs = s.executeQuery("SELECT * FROM Employees " +
"WHERE EmployeeID >= 10002 AND " +
"EmployeeID Which code segments display the entire content of the result set assuming that columns EmployeeID and Extension are of SQL type SMALLINT and column Name is of SQL type VARCHAR?
A. do
{
System.out.println(rs.getShort("EmployeeID"));
System.out.println(rs.getString("Name"));
System.out.println(rs.getShort("Extension"));
} while (rs.next())
B. do
{
System.out.println(rs.getString("EmployeeID"));
System.out.println(rs.getString("Name"));
System.out.println(rs.getString("Extension"));
} while (rs.next())
C. while (rs.next())
{
System.out.println(rs.getString(1));
System.out.println(rs.getString(2));
System.out.println(rs.getString(3));
}
D. while (rs.next())
{
System.out.println(rs.getString(0));
System.out.println(rs.getString(1));
System.out.println(rs.getString(2));
}
E. while (rs.next()) E.while (rs.next()) E.while (rs.next())
{
System.out.println(rs.getString("EmployeeID"));
System.out.println(rs.getString("Name"));
System.out.println(rs.getString("Extension"));
}
Answer: CE

10. Assuming variable env is a reference to a hashtable containing the parameters necessary to obtain the JNDI initial context, which of the following obtains a JDBC data source named MyDataSource?
A. DataSource ds;
try {
ctx = new InitialContext(env);
ds = (DataSource) ctx.lookup("MyDataSource");
} catch (NamingException ne) { }
B. DataSource ds;
try {
ctx = new InitialContext(env);
ds = (DataSource) ctx.getConnection("MyDataSource");
} catch (NamingException ne) { }
C. DataSource ds;
try {
ctx = new InitialContext(env);
ds = (DataSource) ctx.getNameInNamespace("MyDataSource");
} catch (NamingException ne) { }
D. DataSource ds;
try {
ctx = new InitialContext(env);
ds = (DataSource) ctx.getURLOrDefaultInitCtx("MyDataSource");
} catch (NamingException ne) { }
Answer: A

11. Where would an EJB reference be found if it were placed in the JNDI location recommended in J2EE 1.3?
A. java:comp/env/ejb
B. java:comp/ejb
C. java:ejb
D. java:env/ejb
Answer: A

12. From the perspective of an EJB client, what types of EJBs will always be unique for every create() call?
A. Entity
B. Stateless Session
C. Stateful Session
D. Message-Driven
Answer: AC

13. What is best method for obtaining a home interface for a bean named Employee?
A. Context initCtx = new InitialContext(System.getProperties());
Object o = initCtx.lookup("EmployeeHome");
EmployeeHome empHome = (EmployeeHome)
javax.rmi.PortableRemoteObject.narrow(o,
EmployeeHome.class);
B. Context initCtx = InitialContext.getDefaultContext();
Object o = initCtx.lookup("EmployeeHome");
EmployeeHome empHome = (EmployeeHome)
javax.rmi.PortableRemoteObject.narrow(o,
EmployeeHome.class);
C. Context initCtx = new InitialContext(System.getProperties());
EmployeeHome empHome = (EmployeeHome)
initCtx.lookup("EmployeeHome");
D. Context initCtx = InitialContext.getDefaultContext();
EmployeeHome empHome = (EmployeeHome)
initCtx.lookup("EmployeeHome");
Answer: A

14. EJB clients must supply which two of the following pieces of information in order to use JNDI services?
A. The IP address of a Web container
B. The DataSource name for a JDBC database
C. A provider URL detailing the location of the name tree
D. The class name of the initial context factory
Answer: CD