Which of the following is NOT a part of a Looker project?

In the context of a Looker project, it is essential to understand the primary components that constitute the project structure. Looker projects generally consist of model files, view files, and other files that are necessary for the configuration and logic of the data exploration and visualization.

Model files define how users interact with the data by specifying which views will be used and how they relate to one another. View files are where the details of individual data tables, including dimensions and measures, are defined, allowing users to create meaningful explorations.

The term "Database Files," however, does not align with the typical components of a Looker project. Looker connects to external databases to source its data, but those database connections and configurations are not considered part of the Looker project itself. Essentially, Looker operates on top of these databases, but the actual database files reside outside of the Looker environment, distinguishing them from the structured components like model and view files that are integral to how Looker organizes and processes data for analysis.

Thus, identifying "Database Files" as not part of a Looker project reflects an understanding of the project's architecture and how Looker interacts with data sources.