Final answer:
The most common form of file structure is the sequential file. In this structure, data is stored in a continuous order, allowing for sequential access. Indexed and indexed sequential files use indexes for faster and more efficient access to specific records.
Step-by-step explanation:
The most common form of file structure is the sequential file. In a sequential file structure, data is stored in a continuous order, with each record being stored one after another. This means that the records can be accessed sequentially, starting from the beginning of the file and moving forward.
For example, imagine a file that stores information about students. Each student's record contains their name, age, and grade. In a sequential file, the records would be stored in the order in which they were added to the file, such as in alphabetical order by student name.
In contrast, the indexed file and the indexed sequential file use an index to allow for faster and more efficient access to specific records, rather than having to read through the entire file sequentially.
The most common form of file structure used is the sequential file, where records are organized in a specific order and each new record is added at the end.
The most common form of file structure is B) the sequential file. Sequential files are organized in a specific order, usually based on key fields, and the records are stored one after the other. This file structure is often used for logs, where each new entry is added at the end, and for data files where the processing occurs in a sorted order. It is less efficient for random access because you might need to read through many unwanted records to get to the one you need, but it is very efficient for reading records in sequence.
Other types of file structures include the piled file, which is a simple accumulation of records; the indexed file, where an index is used to allow random access to records; and the indexed sequential file, which combines elements of both sequential and indexed methods to improve efficiency for both sequential and random access.