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Correct Answers: A, B, and E A. Correct: CPU utilization is shown both numerically and graphically on the Performance tab of the Windows Task Manager. B. Correct: Network utilization is shown both numerically and graphically on the Networking tab of the Windows Task Manager. C. Incorrect: Page file utilization information is not available from the Windows Task Manager. D. Incorrect: Packet loss cannot be viewed from the Windows Task Manager. However, executing the command NETSTAT -S -P TCP from the command line shows the Segments Retransmitted statistic, which is very similar to overall packet loss. E. Correct: Memory usage is shown both numerically and graphically on the Performance tab of the Windows Task Manager. F. Incorrect: Open files cannot be viewed from the Windows Task Manager.

24-10

create table ITEM ( ... INITIAL_PRICE number(10,2) default '1', ... );

24

Correct Answers: A and D A. Correct: The Performance Logs And Alerts snap-in, available through the Computer Management console, is the correct graphical tool for creating performance logs. B. Incorrect: The System Monitor snap-in is useful for monitoring real-time performance data, but it cannot log performance data. C. Incorrect: Although the Windows Task Manager is useful for viewing a real-time snapshot of a system s performance, it cannot be used to log performance data. D. Correct: Using the Logman utility is the correct way to start logging performance data from the command line. E. Incorrect: Relog is useful for analyzing logged data, but it is not used for starting the logging process. Relog is used to resample logged data at a longer interval in order to reduce the amount of data being analyzed.

If you use Hibernate s schema export tool, hbm2ddl, you can enable this output by adding a default attribute to the property mapping:

Correct Answers: D A. Incorrect: The System Monitor is useful for viewing the processor utilization of a given process, but it cannot change a process priority. B. Incorrect: The Performance Logs And Alerts snap-in is useful for logging performance data, and allows you to record a given process processor utilization. However, it cannot be used to change the priority of a process. C. Incorrect: The Computer Manager provides access to both the System Monitor and the Performance Logs And Alerts snap-ins, but none of these tools can be used to change the priority of a process. D. Correct: The Processes tab of the Task Manager is used to change the priority of a process. Right-click the name of a process, choose Set Priority, and select the desired level.

In the Administrator: Deployment Tools Command Prompt window, type the following command to display the status of the features in the image and the names you must use to manipulate them, and press Enter:

Correct Answers: B A. Incorrect: The Adjust For Best Appearance option enables every visual feature of the Windows XP Professional operating system. This provides the best user experience on systems that have sufficient processing capability. However, it reduces system responsiveness and must not be used on systems experiencing performance problems. B. Correct: The Adjust For Best Performance option disables all unnecessary visual effects. Choosing this option reduces the amount of work Windows XP needs to do to display the user s graphical interface, thereby improving system responsiveness. Changing this setting is the best way to make the computer seem faster.

<class name="Item" table="ITEM" dynamic-insert="true" dynamic-update="true"> ... <property name="initialPrice" type="big_decimal"> <column name="INITIAL_PRICE" default="'1'" generated="insert"/> </property> ... </class>

Monitor, Optimize, and Troubleshoot Performance of the Windows XP Professional Desktop 24-11

C. Incorrect: Optimizing processor scheduling for background services is useful on servers because it ensures that interactive applications do not reduce the performance of a server s primary tasks. However, it does reduce system responsiveness for users working interactively with the computer because background services receive higher priority than interactive applications. D. Incorrect: Optimizing memory usage for system cache improves the performance of file sharing and Web services. However, when you allocate more of the system RAM to these services, interactive applications suffer. E. Incorrect: Windows XP uses virtual memory as an extension of the system s physical RAM. It is a slow process to page data from the physical memory to the virtual memory located on the system s hard disk, but decreasing the size of the paging file does not improve system performance.

Note that you also have to enable dynamic insertion and update statement generation, so that the column with the default value isn t included in every statement if its value is null (otherwise a NULL would be inserted instead of the default value). Furthermore, an instance of Item that has been made persistent but not yet flushed to the database and not refreshed again won t have the default value set on the object property. In other words, you need to execute an explicit flush: