Which statement about creating custom transformers is accurate?

• A. They appear only in the Navigator.
• B. They can be created from scratch or by incorporating existing transformers.
• C. They cannot have a name.
• D. They must always be uploaded to FME Hub.

Answer: (B)

Creating custom transformers lets you package a reusable set of transformations into a single unit that can expose its own parameters. The statement reflects the two flexible ways to build these: you can start from scratch, designing a new transformer from nothing, or you can take an existing sequence of transformers and combine them into one custom transformer. This ability to compose from existing components or to create new ones from the ground up is what makes custom transformers a powerful way to streamline workflows and reuse logic across projects.

Other points aren’t required for the core concept. Custom transformers don’t appear only in the Navigator; they also live in the Transformer Gallery and can be reused across workspaces. They can have a name, which helps you identify and manage them. And you don’t have to upload every custom transformer to FME Hub—sharing to Hub is optional, not mandatory.