For what purpose is the data property adjustment typically performed by a DBA?

• A. To enforce data integrity
• B. To manage user access
• C. To optimize query performance
• D. To standardize data formats

Answer: (C)

The adjustment of data properties by a Database Administrator (DBA) is primarily aimed at optimizing query performance. When DBAs fine-tune data properties, they may analyze how data is structured, indexed, or partitioned within a database. By optimizing these aspects, they can significantly improve the speed and efficiency of data retrieval, which is crucial for ensuring that applications and end-users experience minimal latency during queries.

For example, by creating appropriate indexes on frequently queried fields or optimizing table structures, DBAs can reduce the time it takes for the database management system to locate and return the necessary data. This enhancement directly impacts the overall performance of applications dependent on these databases.

Other options, while important roles in database management, focus on different aspects. Enforcing data integrity relates to maintaining accuracy and consistency of data, managing user access involves controlling who has permissions within the database, and standardizing data formats is about ensuring data uniformity, which can aid in integration and understanding, rather than specifically targeting performance optimization. Thus, the primary goal of adjusting data properties aligns most closely with enhancing query performance.