What is indexed files?

Indexed files are a type of data organization method used in computer systems. They store data in a sequential format that can be easily accessed and searched using an index or key.

There are different types of indexed files, such as primary index files, secondary index files, and clustered index files. In a primary index file, the index is based on the primary key and is used for retrieving data quickly. In a secondary index file, the index is based on a non-primary key and is used for retrieving data when the primary key is not available. A clustered index file is based on the physical order of the data on the storage device and can be used to retrieve data quickly.

Indexed files are commonly used for data-intensive applications such as database management systems, inventory management, and financial reporting. They offer optimized retrieval time, efficient data storage and retrieval, and support for large data sets. However, they also require maintenance to keep the indexes updated and can be more complex to implement than other data organization methods.