Which method and parameter should you use to efficiently list only JSON files from an input dataset?

The method and parameter that allow for efficiently listing only JSON files from an input dataset is achieved through the use of the filesystem.ls method with the glob parameter. This method is specifically designed to retrieve a list of files that match a specified pattern, in this case, files ending with the .json extension.

Using the glob parameter is particularly powerful because it employs wildcard matching, which allows for flexible and efficient filtering of files based on their naming conventions. This approach not only streamlines the process of locating specific file types but also enhances performance by directly targeting the relevant files without unnecessary overhead.

In comparison, other methods like filesystem.list or filesystem.open are not tailored for simply listing file names based on a pattern. Instead, filesystem.open is primarily for opening files, while filesystem.read_files is meant for reading the contents of files rather than listing them. Therefore, they do not align with the goal of efficiently retrieving a list of JSON files.