In this chapter, you learned to get data from files and put data back into new files. Specifically, you learned how to read plain files, files with XML and JSON format, and spreadsheets. You also learned to create the same kind of files. Besides, you learned to read files located in big data sources, namely, HDFS and S3, and also write files back to the cloud.
You are now ready to continue learning to transform data and perform all kinds of useful operations, including dealing with XML and JSON structures. This will be covered in the next chapter.
