Answer:b) Master reference file(MRF)
Explanation: Master reference file is the collection of data that persist the schedules records for the maintenance and administration. It is the UDC version tool .
It helps in the managing the data content present in the database, archiving and tracing any changes on the database over certain time.Master data management is the managing of data's integrity .It send the collected critical data to the master reference files.
Other given options are incorrect because backup file is for creating data backup, central directory is record of the data of users and other information and data silo is kind of fixed data having the governance of any organization.Thus, these factors don't help in the critical information management.Thus, the correct option is option(b).
Digital signals (usually binary coded) can include extra information that can be used for error detection or even correction. This allows recovery of the original signal, either by requesting retransmission or by directly correcting the error.
<span>analog signals can't include any extra information needed for this purpose. it is impossible to distinguish an error from the original data.
cited:</span>http://www.answers.com/Q/Which_has_greater_resistance_to_transmission_errors_Binary_signaling_or_Ana...
step by step
1. Open the Disk Cleanup by clicking Start, point to All Programs, point to Accessories, point to System Tools, and then click Disk Cleanup. Disk Cleanup will then calculate how much space you will be able to free on your hard drive.
2.Select the files by clicking the check box that you would like to delete (e.g. Downloaded Program Files and Temporary Internet Files) and click OK
3. Click Yes to confirm performing these actions.
To read the description of the particular program file, click the appropriate file and the file description is displayed at the bottom. If you want view the files on the particular program file (e.g. Downloaded Program Files and Temporary Internet Files), click View Files.
4. Click More Options tab to free up more space on Windows components, installed programs or System Restore. Click Clean up
Answer:
A display device is the most common form of output device it presents output visually on a computer screen.the output appears temporarily on the screen and can easily altered or erased,it is sometimes referred to as softcopy
