Question: Different implementations ( by different classes ) from a single method declared in an interface is a form of method overriding. Which of the following

Different implementations (by different classes) from a single method declared in an interface is a form of method overriding. Which of the following is a sample from this form of overriding?
Implementation of toString() in programmer-defined classes
Implementation of "compareTo()" in programmer-defined classes
None of them
Both of them

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