Question

Give the advantages of disadvantages of index sequential access method.

Answer 1

The advantages of disadvantages of index sequential access method are:

Advantages:

• It combines both sequential and direct
• Suitable for sequential access and random access.
• Provides quick access to records.

Disadvantages:

• It uses special software and is expensive.
• Extra time is taken to maintain index.
• Extra storage for index files.
• Expensive hardware is required.