1Z0-811 Arrays and Methods Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  int[] copy = original;

  Why this is correct

  This simply copies the reference, so both variables point to the same array. Any modification to one affects the other.

• ✗

  int[] copy = Arrays.copyOf(original, original.length);

  Why it's wrong here

  Arrays.copyOf creates a new array with the specified length and copies elements, making it independent.

• ✗

  int[] copy = original.clone();

  Why it's wrong here

  clone() creates a new array with the same elements, so it is independent.

• ✗

  int[] copy = new int[original.length]; System.arraycopy(original, 0, copy, 0, original.length);

  Why it's wrong here

  System.arraycopy copies elements to a new array, so the original and copy are independent.