A file is a named collection of data. It normally resides on a secondary storage device such as a disk or tape. It may be manipulated as a u...
A file is a named collection of data. It normally resides on a secondary storage device such as a disk or tape. It may be manipulated as a unit by operations such as
- open – prepare a file to be referenced.
- close – prevent further reference to a file until it is reopened.
- create – build a new file.
- destroy – remove a file.
- copy – create another version of the file with a new name.
- rename – change the name of a file.
- list – print or display the contents of a file.
- read – input a data item to a process from a file.
- write – output a data item from a process to a file.
- update – modify an existing data item in a file.
- insert – add a new data item to a file.
- delete – remove a data item from a file.
- volatility – this refers to the frequency with which additions and deletions are made to a file.
- activity – this refers to the percentage of a file’s records accessed during a given period of time.
- size – this refers to the amount of information stored in the file.
