Question

The advantage of the _____ access method is that both sequential and random access can be used to access records, depending on the number being accessed.

1) indexed sequential
2) progressive
3) direct random
4) random-serialized

Answer 1

The indexed sequential access method combines the benefits of both sequential and random access. It uses an index to efficiently locate records for rapid, random retrieval while also supporting reading records in order.

Step-by-step explanation:

The advantage of the indexed sequential access method is that both sequential and random access can be used to access records, depending on the number being accessed. This method uses an index to keep track of the records, allowing for rapid locating of records for random access, while still maintaining the ability to read through the records sequentially. It is particularly efficient when dealing with a large number of records because it provides the flexibility of access method based on the specific need, be it a single record access or reading through a sequence of records.