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File Management - system can be define as a system that an operating…
File Management - system can be define as a system that an operating system which uses to keep track of different files.
Concept of File
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A file could be a program text files, word documents, image files, audio or files.
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File access techniques
sequential
- data is accessed one record right after the last
- allocate space
Advantages
- Simple file design
- Can be stored on inexpensive devices like magnetic tape
Disadvantages
- Overall processing is slow
indexed
to find a record on the file,we first search the index and then by the help of pointer we access the file directory.
direct
- method is useful of disks
- file is viewed as numbered sequence
- direct access files
advantages
- Fast access to records
- Can be updated more quickly
disadvantages
- Several records with unique keys may generate same logical address
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