R

Ram Sharma • 3.40K Points
Extraordinary

Q. Which collector would you use to count the number of elements grouped by a key?

  • (A) groupingBy(..., counting())
  • (B) groupingBy(..., mapping())
  • (C) groupingBy(..., toList())
  • (D) groupingBy(..., reducing())
  • Correct Answer - Option(A)
  • Views: 3
  • Filed under category Java
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Explanation by: Ram Sharma
`groupingBy(..., counting())` creates a frequency map by counting elements per group.

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