Which QlikView prefix would you use to limit the number of rows fetched during data load?

The choice of prefix that allows you to limit the number of rows fetched during data load in QlikView is indeed "First." This prefix is utilized in load scripts to specify that only a defined number of records from the dataset should be loaded into the application. For example, by using "First 100" in a load statement, QlikView will only retrieve the first 100 records from the source, optimizing performance and reducing the volume of data being processed, which is particularly useful during development or testing phases.

In contrast, the other prefixes do not serve this specific purpose. "Buffer" does not exist in the context of row limits, and "Replace" is commonly associated with replacing existing data within the QlikView model. "When" acts as a filter condition but does not explicitly limit the number of rows to load. Consequently, "First" is the only option that achieves the aim of restricting the number of rows fetched during data load, making it the correct choice.