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Which of these statements about what Collections.reverse and Collections.shuffle do to the list they receive is correct?

  • A.They return a rearranged copy and leave the original untouched.
  • B.They return a view whose order differs from the backing list.
  • C.They rearrange it in place and return the same list for chaining.
  • D.They rearrange it in place and return nothing.

Answer: D

Both are void and mutate the argument, which means they need a modifiable list and will throw UnsupportedOperationException on a fixed-size one such as the result of Arrays.asList. Producing a rearranged copy means copying into a new list first.

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