What is the benefit of using a wildcard in the Merge Feature Type parameter?

• A. It prevents reading unknown types.
• B. It disables reading.
• C. It requires manual mapping for each type.
• D. It allows automatic handling of varying feature types.

Answer: (D)

Using a wildcard in the Merge Feature Type parameter makes the transformer adapt to different feature types automatically, so it can merge inputs even when the exact types vary or change over time. This wildcard approach eliminates the need to enumerate and map every possible type, which reduces maintenance and prevents failures when new or unexpected feature types show up in the stream. It enables automatic handling of varying feature types, which is exactly what you want in a dynamic data flow.

The other options don’t fit because a wildcard doesn’t prevent reading unknown types or disable reading; and without a wildcard you’d be forced to manually map each type, which is more work and less flexible.