Data corruption refers to errors in computer data that occur during writing, reading, storage, transmission, or processing, which introduce unintended changes to the original data. Computer storage and transmission systems use a number of measures to provide data integrity, or lack of errors.
In general, when data corruption occurs, the file containing that data may become inaccessible, and the system or the related application will give an error. For example, if a Microsoft Word file is corrupted, when you try to open that file with MS Word, you will get an error message, and the file would not be opened. Some programs can give a suggestion to repair the file automatically (after the error), and some programs cannot repair it. It depends on the level of corruption, and the in-built functionality of the application to handle the error. There are various causes of the corruption.
Read more about Data Corruption: Transmission, Storage, Countermeasures
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