What is the name of the tool used in MuleSoft for data transformation?

The correct answer is DataWeave, which is MuleSoft's powerful data transformation language. DataWeave is specifically designed to facilitate the conversion of data from one format to another. It provides a concise syntax that allows developers to easily write transformation logic, regardless of the data source or target format, whether it's JSON, XML, CSV, or other data types.

DataWeave functions as an integrated part of MuleSoft's Anypoint Platform and plays a crucial role in API integration projects by enabling seamless data exchanges between various systems. It allows for complex transformations, including filtering, mapping, and aggregating data, providing a robust solution for handling diverse data integration needs.

The other options refer to related concepts but do not represent the official name of the tool used for data transformation within MuleSoft. Data Mapper could imply a general mapping tool but does not refer to the specific language used. Transformation Engine is not a recognized term in the context of MuleSoft's suite of tools, and Data Transformer lacks the specificity and recognition of DataWeave, which is the industry-standard for data transformation tasks in MuleSoft.