generate qr code using c# Monitoring and Optimizing System Performance and Reliability in Visual C#.NET

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Monitoring and Optimizing System Performance and Reliability
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D. Correct: The Recovery Console is a useful tool for recovering a system that does not boot correctly. If the system has the recovery console installed, it is an option on the boot menu. If it is not installed, insert the Windows XP Professional CD and boot from the CD the Recovery Console is an option. Recovery Console is command-line only, so it is not as convenient for diagnosis and troubleshooting as safe mode. However, because it can be loaded from a CD, it starts even if the system s hard disk is completely destroyed. In this scenario, use the Recovery Console to diagnose the extent of the damage. If you determine that system files have been damaged, you can initiate a scan of the disk and, if necessary, restore files from the system CD. E. Correct: You use ASR only after attempts to resolve the problem with safe mode and the Recovery Console have failed. If the hard disk is functional, but files have been damaged, ASR can make the Windows XP Professional installation bootable. If the hard disk itself is damaged, you need to fix those errors or replace the hard disk before using ASR. F. Incorrect: The Device Manager is a useful tool for diagnosing problems relating to hardware drivers. However, it is accessible only after the system has successfully booted. In this scenario, you cannot get access to the Device Manager tool unless you first start safe mode.
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Correct Answers: B and D A. Incorrect: The FORMAT recovery console command can be used to format a hard disk. This process erases all data on the hard disk and must be used only when all other recovery methods fail. B. Correct: You cannot boot the computer directly from the Recovery Console. The system must be rebooted before Windows XP can be started in any configuration. C. Incorrect: The Enable And Disable Recovery Console can be used to set the startup value of services. D. Correct: The Recovery Console cannot be used to launch the Windows XP setup routine. E. Incorrect: The Recovery Console can copy files from floppy drives and CDs using the COPY command. F. Incorrect: The Recovery Console can copy files across the network after a drive letter has been mapped using the Net Use command. G. Incorrect: Use the Bootcfg Recovery Console command to edit the Boot.ini file.
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Objective 4.3
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Restore and Back Up the Operating System, System State Data, and User Data 24-25
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Correct Answers: C A. Incorrect: Creating a restore point prior to installing a new application enables you to restore the system s configuration if the new application causes problems. However, Windows XP creates a Restore Point automatically when you launch a Setup application. B. Incorrect: Use the Last Known Good Configuration only if the system becomes unbootable. It might be a useful tool if the new application stops your system from starting successfully, but it must not be used prior to installing an application. C. Correct: The Backup Utility enables you to back up all files and configuration settings to removable media. Having a valid backup allows a Windows XP Professional system to be completely rebuilt in the event of a complete failure. Always create a backup of a system before installing a potentially troublesome application. D. Incorrect: Safe mode is a valuable tool for repairing a system that is having problems booting. Use it only after the system has failed, however. E. Incorrect: The Recovery Console can salvage systems that are otherwise completely unbootable. Do not use it prior to installing an application, however, because it does not facilitate backing up files or configurations.
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Correct Answers: E A. Incorrect: Performing a normal backup every night enables you to restore the entire system using only a single night s backup tape. However, it uses more tape backup media than is necessary because every file on the system is backed up every night. B. Incorrect: The incremental backup makes a copy of all files marked with the archive attribute. After each file has been backed up, the file s archive attribute is cleared. Therefore, the incremental backup copies only files that were modified since the last backup. Performing only incremental backups would require restoring every single backup ever made in the event of a hard disk failure. C. Incorrect: The differential backup makes a copy of all files marked with the archive attribute. Unlike the incremental backup, the differential backup does not modify the archive attribute of files after creating the backup. In this way, performing a differential backup every night ensures that every file modified since the last full backup can be restored. This is useful when combined with a normal backup, but using only differential backups results in a backup set that grows larger every night. Therefore, the differential backup does not meet the criteria of minimizing the backup media used.
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