The java string format() method returns the formatted string by given locale, format and arguments. If you don't specify the locale in String.
A flat-file database is a database stored in a file called a flat file. Records follow a uniform format, and there are no structures for indexing or recognizing relationships between records. The file is simple.
The DataWeave (dw) format is the canonical format for all transformations. This format can help you understand how input data is interpreted before it is transformed to a new format.
A comma-separated values (CSV) file is a delimited text file that uses a comma to separate values. Each line of the file is a data record.
Avro is a row-based storage format for Hadoop, which is widely used as a serialization platform.