When working with indexed files, what is the purpose of the "alternate key" in performance optimization?
- To act as a backup key in case of primary key failure
- To add redundancy to the index file
- To improve search and retrieval performance
- To provide an alternative method for sorting the file
The "alternate key" in indexed files serves to enhance search and retrieval performance by providing an alternative means of accessing data. It allows for efficient retrieval based on criteria other than the primary key, optimizing file access.
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