Which statement describes how the DatabaseJoiner transformer functions?

• A. It allows joining directly to web-stored data without additional readers.
• B. It extracts data from a cloud database schema.
• C. It writes to a web service.
• D. It downloads files to local disk.

Answer: (A)

The function being tested is that the DatabaseJoiner performs a live join between incoming features and data stored in a database, using a key field to fetch matching rows and attach those database attributes to the features. This means you can connect directly to a database (even one accessed over the web) and bring in related fields without first reading the database table into FME with a separate reader. It also supports different join types and can cache lookups for efficiency, so repeated hits don’t incur repeated database queries.

This isn’t about writing to a web service, downloading files to disk, or extracting data from a cloud database schema. It’s about dynamically enriching your features by joining them to remote database data through a configured database connection.