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The fourth option is to represent inheritance relationships as relational foreign key associations. Every class/subclass that declares persistent properties including abstract classes and even interfaces has its own table. Unlike the table per concrete class strategy we mapped first, the table here contains columns only for each noninherited property (each property declared by the subclass itself) along with a primary key that is also a foreign key of the superclass table. This approach is shown in figure 5.3. If an instance of the CreditCard subclass is made persistent, the values of properties declared by the BillingDetails superclass are persisted to a new row of the BILLING_DETAILS table. Only the values of properties declared by the subclass are persisted to a new row of the CREDIT_CARD table. The two rows are linked together

For two computers to communicate, they must agree to speak a common language. On the Internet, and most private networks, this common language is TCP/IP. Each device on a TCP/IP network is assigned one or more unique IP addresses. You can assign IP addresses in three ways: DHCP, Automatic Private IP Addressing (APIPA), or manually. Both DHCP and APIPA are enabled by default. If a computer cannot communicate with another computer on the network, you must verify that the network adapter is installed and operational in Device Manager. Next, verify that it is physically connected to the network. Then run protocol-specific utilities designed to test network connections. Some of the tools for testing TCP/IP connectivity included with Windows XP Professional are Arp.exe, Hostname.exe, Ping.exe, Pathping.exe, Tracert.exe, Netstat.exe, Route.exe, and Ipconfig.exe. To successfully answer questions in this objective, you must know how to install, configure, manage, and troubleshoot network adapters. You also need to know how to install, configure, manage, and troubleshoot TCP/IP connections.

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by their shared primary key value. Later, the subclass instance may be retrieved from the database by joining the subclass table with the superclass table. The primary advantage of this strategy is that the SQL schema is normalized. Schema evolution and integrity constraint definition are straightforward. A polymorphic association to a particular subclass may be represented as a foreign key referencing the table of that particular subclass. In Hibernate, you use the <joined-subclass> element to create a table per subclass mapping. See listing 5.3.

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Which of the following is the correct order Windows XP Professional uses for resolving a DNS host name Choose the correct answer. A. (1) Check the local computer s host name for a match. (2) Check the NetBIOS name cache. (3) Send a WINS query if configured. (4) Send a broadcast query for a matching NetBIOS name. (5) Check the LMHOSTS file for a match. (6) Check the HOSTS file for a match. (7) Send a DNS query. B. (1) Check the local computer s host name for a match. (2) Send a DNS query. (3) Check the HOSTS file for a match. (4) Check the NetBIOS name cache. (5) Send a WINS query if configured. (6) Send a broadcast query for a matching NetBIOS name. (7) Check the LMHOSTS file for a match. C. (1) Check the local computer s host name for a match. (2) Check the HOSTS file for a match. (3) Send a DNS query. (4) Check the NetBIOS name cache. (5) Send a WINS query if configured. (6) Send a broadcast query for a matching NetBIOS name. (7) Check the LMHOSTS file for a match. D. (1) Check the local computer s host name for a match. (2) Check the HOSTS file for a match. (3) Send a DNS query. (4) Check the NetBIOS name cache. (5) Check the LMHOSTS file for a match. (6) Send a WINS query if configured. (7) Send a broadcast query for a matching NetBIOS name.

<hibernate-mapping> <class name="BillingDetails" table="BILLING_DETAILS"> <id name="id" column="BILLING_DETAILS_ID" type="long"> <generator class="native"/>

Your computer is able to connect to some network resources with no problem, but you feel that performance is abnormally slow when connecting to some specific servers located in remote offices. You suspect that there might be a routing issue on your network. Which tools included with Windows XP Professional are best for examining these types of problems Choose two correct answers. A. Pathping.exe B. Arp.exe C. Tracert.exe D. Ping.exe E. Ipconfig.exe