Objects are instances of classes that have their own state and behavior, while abstract data types define a common interface that hides implementation details and is typically realized through classes where each instance is an object. While objects are a kind of abstract data type, abstract data types are interfaces that define behaviors without specifying their implementation, whereas objects are instances of classes with their own copies of variables.

1. 6. What are the differences between objects and abstract data types
Solution
Differences between Objects and Abstract data types:
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Objects: Object is an instance of a class and it has states and behaviours of class.
Abstract data type: It is a data type of abstract and it hides the representation of class, and it is
typically implemented as a class and each instance of Abstract data type is usually an object of
that class.
Objects and Abstract data types are not the same. But these are not different with each other.
Objects are a kind of Abstract data types.
An Abstract data type is an interface.But objects are instance of a class, with its own copy of any
non-static variables.
Abstract data type is a collection of methods but in case of objects it is not an interface.It is an
representation of a class with new operator.
A class can have one or more Abstract data types in the same way class can have one or more
objects also.
To understand you with clear for Example, Collection interface is Abstract data type, ArrayList
is a class and you can make ArrayList object with new operator.