In a ResultSet, what method retrieves metadata about the columns?

• A. getColumnInfo()
• B. getMetaData()
• C. getColumnNames()
• D. getAttributes()

Answer: (B)

The appropriate method to retrieve metadata about the columns in a ResultSet is indeed the method that provides descriptive information about the structure of the result set, including details such as the number of columns, their types, and their names. This function is essential for understanding the data that has been retrieved from a database and for dynamically managing data within the application.

The method getMetaData() serves this purpose by returning a ResultSetMetaData object, which contains all the information described. This allows developers to inspect the columns without needing to know the structure of the underlying database tables a priori.

The other options do not exist in the context of the standard ResultSet interface. For instance, getColumnInfo() is not a recognized method for obtaining metadata in this context, nor is getColumnNames(), which misleadingly suggests a function that would specifically list the column names rather than providing comprehensive metadata. Similarly, getAttributes() does not provide metadata related to the columns in a ResultSet. Thus, using getMetaData() is the correct and standard approach for obtaining column metadata from a ResultSet.