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Windows CardSpace is Microsoft’s client software for the Identity Metasystem (The Identity Metasystem is an interoperable architecture for digital identity that enables people to have and employ a collection of digital identities based on multiple underlying technologies, implementations, and providers.). CardSpace is an instance of a class of identity client software called an Identity Selector. CardSpace stores references to users’ digital identities for them, presenting them to users as visual Information Cards. CardSpace provides a consistent user interface (UI) that enables people to easily use these identities in applications and websites where they are accepted.
There are so many websites developing exam preparation solutions for certification exams. These websites endeavors to give the latest and most advanced preparation tools to those aspiring for the certification exams. They not only guarantee your success at getting certified, but also equip you to truly understand the subject. This preparation methodology will give you a competitive edge over others who may be paper certified but not qualified to use the skills on the job.
Disk Partition
A disk partition is a logical section of a hard disk on which the computer may write data. Disk partition is the way to divide the single physical hard disk into multiple areas, each of which is treated as a different disk within Windows operating system. Some people create separate partitions for particular programs to organize their files. Microsoft Windows computers, it is common to store the OS and applications on one hard disk partition and user data on another hard disk partition. You can create disk partition by using Windows XP Setup utilities after you have started the installation or by running partitioning utility prior to starting the installation of Windows XP. Partition information is stored in the master boot record of a hard drive and is independent of any operating system installed on the computer. You can create the following types of disk partitions on a hard disk:
SQL Server buffer pages in RAM to minimize disc I/O. Any 8 KB page can be buffered in-memory, and the set of all pages currently buffered is called the buffer cache. The amount of memory available to SQL Server decides how many pages will be cached in memory. The buffer cache is managed by the Buffer Manager. Either reading from or writing to any page copies it to the buffer cache. Subsequent reads or writes are redirected to the in-memory copy, rather than the on-disc version. The page is updated on the disc by the Buffer Manager only if the in-memory cache has not been referenced for some time. While writing pages back to disc, asynchronous I/O is used whereby the I/O operation is done in a background thread so that other operations do not have to wait for the I/O operation to complete. Each page is written along with its checksum when it is written. When reading the page back, its checksum is computed again and matched with the stored version to ensure the page has not been damaged or tampered with in the meantime.
Shadow Copy (also called Volume Snapshot Service or VSS) is a technology included in Microsoft Windows that allows taking manual or automatic backup copies or snapshots of data, even if it has a lock, on a specific volume at a specific point in time over regular intervals. It is implemented as a Windows service called the Volume Shadow Copy service. A software VSS provider service is also included as part of Windows to be used by Windows applications. Shadow Copy technology requires the file system to be NTFS.
The end result is similar to a versioning file system, allowing any file to be retrieved as it existed at the time any of the snapshots was made. Unlike a true versioning file system, however, users cannot trigger the creation of new versions of an individual file, only the entire volume. As a side-effect, whereas the owner of a file can create new versions in a versioning file system, only a system administrator or a backup operator can create new snapshots (or control when new snapshots are taken), because this requires control of the entire volume rather than an individual file.