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In this example, the query is executed against a CTE, but the user-defined aggregate can be used against tables as well.

For more information on optical drives, see Understanding Storage Devices in 2, Getting to Know Your Mobile PC Hardware.

Essentially all that needs to be done is to check that the value isn t null and that it s not cancelled (if it is, trying to retrieve the Result property will probably result in an exception or unpredictable behavior at best) and simply use the Result property of the specific EventArgs object that s being trapped. To summarize, there are essentially three primary methods for using delegates to asynchronously invoke a Web method:

Terminal Services client software Software used for client computers that access applications remotely on a network. timeout An error caused by an e-mail or news post that takes longer than the allotted time to download. Timeout errors can be eliminated by increasing how much time Outlook is allotted to download messages from a mail server. Uniform Resource Locator (URL) The URL of a website is its friendly name, for instance, http://www.microsoft.com. URL See Uniform Resource Locator (URL).

A firewall acts as a security system that creates a border between the computer or network and the Internet. This border determines what traffic is allowed in or out of the local network or computer. Firewalls help keep hackers, viruses, and other evils from infiltrating the computer and network. There are two basic types of firewalls:

The property pages in the Properties dialog box expose properties that fall into several broad categories:

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Lessons in this chapter:

TRUNCATE TABLE Succeeds, but deleted rows are not tracked and the minimum valid version is updated, which requires applications to reinitialize before they can resume synchronization. DROP INDEX or ALTER INDEX DISABLE

Description Property. Determines the direction of flow in the FlowLayoutPanel. Can be set to LeftToRight, RightToLeft, TopBottom, or BottomUp. Property. Determines whether controls will auto matically wrap to the next column or row when the FlowLayoutPanel is resized. Method. This method returns a Boolean value that indicates whether a particular control has had a flow break set. Method. This method sets a flow break on a con trol contained in the FlowLayoutPanel.

T-SQL has two different constructs for commenting code, as follows:

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The base Microsoft Operations Framework 4.0 package consists of 23 documents totaling nearly 600 pages. Although these documents contain a lot of valuable information, students intent on preparing for the 70-686 exam can probably make better use of their time than by reading that package. Fortunately, Microsoft has also published the IT Pro Quick Start Kit, which contains a collection of presentations, graphics, podcasts, and relatively brief documents that provide a basic overview of Microsoft Operations Framework 4.0. In this practice, you download the IT Pro Quick Start Kit and examine its contents.

For more information, see:

Figure 3-7

You are responsible for managing a Windows Server 2003 file server for an accounting firm. One of the accountants informs you that she has deleted several important spreadsheets accidentally from the file server. A differential backup is performed every morning except for Monday, when a full backup is performed at 2:00 A.M. Each day s backup is written to a separate tape, which is labeled with the day the backup is taken. Today is Friday. The accountant believes that she accidentally deleted the spreadsheets yesterday evening. There are five missing spreadsheets. Only two have been worked on in the last week. The first was last modified Monday afternoon and the second has not been edited except for a minor change on Wednesday. Which of the following statements about the backup tapes is correct (Select all that apply.)

The format of the result set. This is specified mostly in the select list. However, other clauses, such as ORDER BY and GROUP BY, also affect the final form of the result set. The tables that contain the data. This is specified in the FROM clause.

Once you have entered the value, simply select the Dec option to view the value in the target notation.

generic type A single programming element that adapts to perform the same func-