Question

d) Why class is called user defined data type?​

Answer 1

Java language uses some pre-defined data types such as int, float and char. ... Similarly, a user may create a data type and declare certain characteristics and behaviour within it. This can be done by using a class. This is the reason why a class is referred as user defined data type

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Answer 2

The name of the class along with different data and method are defined by the user on their choice using some rules That is why, a class can be called as user defined data type