The correct answer is: A. analyzing application systems.
A database administrator (DBA) is a person who is responsible for the design, development, implementation, maintenance, and administration of an organization’s databases. The DBA ensures that the database is reliable, secure, and efficient.
The DBA’s responsibilities include:
- Designing the database schema
- Creating and maintaining the database
- Monitoring the database for performance and security issues
- Backing up and restoring the database
- Providing support to database users
Analyzing application systems is not a responsibility of the DBA. This is the responsibility of the application developer.
The other options are all responsibilities of the DBA.
- Advising programmers: The DBA advises programmers on how to design and develop applications that use the database.
- Designing databases: The DBA designs the database schema, which is the logical structure of the database.
- Developing data dictionaries: The DBA develops data dictionaries, which are documents that describe the data in the database.
I hope this helps!