8.2. 8.2 File Organization
A file is a collection of data that the system maintains in persistent storage. Persistent means that the storage is non-volatile, which means the system maintains the data even after the program terminates; indeed, even if you shut off the system power. For this reason, plus the fact that different programs can access the data in a file, applications typically use files to maintain data across executions of the application and to share data with other applications.
The operating system typically saves file data on a disk drive or some other form of secondary storage device. Because secondary storage tends to be much slower than main memory, you generally do not store data that a program commonly accesses in files during ...
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