Lecture-02.1 - Chapter11 FileSystems(Chapter 11.1 File 1 A...

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Chapter 11 File Systems and Directories
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2 File Systems                       (Chapter  11.1) File: 1. A named collection of related data. 2. smallest amount of information that can be written to secondary storage. 3. sequence of bits, bytes, lines or records File system: Operating System’s logical view of files it manages. Often organized into a hierarchy (tree). Directory: A named group of files. Also called a folder.
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3 Text and Binary Files file: - contains a program or data - creator of a file decides how it is organized - all computer files are patterns of 0’s and 1’s Text file: A file in which the bytes of data are organized as characters from the ASCII or Unicode character sets. Binary file: A file that contains data in a specific format, requiring interpretation.
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4 Text and Binary Files (qualifier) The terms text file and binary file are somewhat misleading… They seem to imply that the information in a text file is not stored as binary data. Ultimately, all information on a computer is stored as binary digits. These terms refer to how those bits are formatted: as chunks of 8 or 16 bits, interpreted as characters, or in some other special format.
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