File organization refers to the way data is stored in a file. File organization is very important because it determines the methods of access, efficiency, flexibility and storage devices to use. There are four methods of organizing files on a storage media. This include: sequential,; random,; serial and; indexed-sequential. A file organized via an index. Also called a "direct file" or a "direct access file," it enables quick access to specific records or other elements within the file rather than having to read the file sequentially. The index points to a specific location within the file, and the file is read from that point. Contrast with sequential file. Serial file organisation is the simplest file organisation method. In serial files, records are entered in the order of their creation. As such, the file is unordered, and is at best in chronological order. Serial files are primarily used as transaction files in which the transactions are recorded in the order that they occur. Sequential.
Random. In random file organisation, records are stored in random order within the file. Though there is no sequencing to the placement of the records, there is however, a pre-defined relationship between the key of the record and its location within the file. In other words, the value of the record key. Random access file organization is discussed for the case of indirect addressing and a high rate of additions and deletions. The equations derived for this special situation are substantially different from those usually used in estimating file requirements. Graphs are included which make it possible to estimate file utilization. Disadvantages of Random file organization 1. Data may be accidentally erased or overwritten unless special precautions are taken. 2. Random files are less efficient in the use of storage space compared to sequentially organized files. 3. Expensive hardware and software resources are required. 4. Relatively complex when.
26 Apr Direct (Random) File Organization A random file would have to be stored on adirect access backing storage medium ic disc, CD, DVD Example: Any information retrieval Train timetable system. Advantages Any record can be directly accessed. Speed of record processing is. A dual link data structure for random file organization. Author links open overlay man. Show more. (75 )Get rights and content. Keywords. Random file organization. hashing. information retrieval. file search. data structures. Recommended articles. Answer: Direct file organization is an organization in which records can be access randomly with the help of som.