When writing to a text file using PrintWriter, data is written as characters using methods like print() and println(). In contrast, writing to a binary file with a DataOutputStream uses methods that correspond to specific primitive data types, such as writeInt(), writeDouble(), and writeBoolean(), which write the data in a machine-readable binary format.
First read the answer fully, then try to explain it in your own words. After that, open a few related questions and compare the concepts. This method helps you remember the topic for a longer time and improves exam preparation.