4. an abstract data type is defined as

object that persist set of values and operations as behavior

Explanation: Abstract data types(ADT)are those object value which are dependent upon the collection of the values and collection of the operations.The organization of the data object is not specified in ADT but the operations that are to be carried out are defined in it.

The implementation individuality displayed by the ADT and hiding of the representation or design makes it abstract.

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