Which of these file types is most likely to be used for bulk data uploads in Workday?

The most suitable file type for bulk data uploads in Workday is a zipped CSV file. This format is particularly advantageous because CSV (Comma-Separated Values) files are structured in a way that allows for easy manipulation and importing of tabular data, which is essential when dealing with large volumes of information.

When zipped, CSV files can reduce storage space and facilitate faster transmission over networks, making the data upload process more efficient. Workday's data loading tools are designed to work seamlessly with CSV files, allowing implementers to load multiple rows of data in a single upload, which is a common need during configurations and data migrations.

In contrast, other file types listed do not align with the typical requirements for bulk data uploads. Word documents and PDFs are primarily used for text and formatting purposes rather than structured data storage, and thus are not suitable for importing complex datasets. Single XML files, while they can be used for data imports, are less common than CSV files for bulk operations within Workday because CSV files are simpler and more user-friendly for large batch uploads.