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What is difference between List and Set?

The difference between List and Set are following:-

                              List                             Set
1 List can contain duplicate values . 1 Set doesn’t allow duplicate. Set interface allows only to unique elements.
2 List is ordered collection based on zero based index. 2 Set is unordered collection ie Set doesn’t ensures the sequence in which data can be retrieved. (except SortedSet)
3 List does not prevent inserting null elements (as many you like). 3 Set will allow only one null element.

 

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