Question

Which of the following statements are true?

A) Collections.shuffle(list, Random) randomly reorders the elements in the list with a specified Random object.

B) If list1 and list2 are identical, the two lists are still identical after invoking Collections.sort(list1, new Random(3)) and Collections.sort(list2, new Random (3)) with the same Random object

C) Collections.shuffle(list) randomly reorders the elements in the list

D) If list1 and list2 are identical, the two lists may be different after invoking Collections.sort(list1) and Collections.sort(list2)

Answer 1

Solution

Answer

A-True

B-True

C-True

D-True

Explanation

A & C) Collections.shuffle(list, Random) randomly reorders the elements in the list with a specified Random object.

General Form

public static void shuffle(List<?> list, Random random)  

Example

List<String> list = Arrays.asList("G", "H", "I", "J");

Collections.shuffle(list);

Hence Answer is True

B & D)If list1 and list2 are identical, the two lists are still identical after invoking Collections.sort(list1, new Random(3)) and Collections.sort(list2, new Random (3)) with the same Random object

If list1 and list2 are identical, the two lists may be different after invoking Collections.sort(list1) and Collections.sort(list2)

Hence Answer is True

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