Certified Pega Data Scientist Practice Exam

When starting data preparation with a CSV file or database data extract, the first step should be to define the data source. This involves clearly identifying and establishing the connection to the data you will be working with, allowing you to understand the structure, format, and the content of the dataset. By defining the data source, you are essentially setting the stage for all subsequent actions in the data preparation process.

This step is crucial because it ensures that you are referring to the correct data and also impacts how the data can be accessed and processed. Once the data source is established, you can then proceed to preview the data, alter field types, or create sample datasets. The proper setup and understanding of the data source lay the groundwork for effective data manipulation and analysis later on.