Java ArrayLists

What index value is used to locate the last element in the nums ArrayList?

• nums.size()

• nums.size()-1

• nums.length()

• nums.lastIndex()

Given the nums ArrayList with the values [5, 4, 3, 2], what statement below removes the value 3 from the list?

• nums.remove(1)

• nums.remove(2)

• nums.remove(3)

• nums.remove(0)

What is printed?
ArrayList<Double> vals;
vals = new ArrayList<Double>();
vals.add(3.5);
vals.add(4.5);
vals.add(5.5);
vals.set(0, 2.5) ;
System.out.println(vals);

• [2.5, 4.5, 5.5]

• [3.5, 4.5, 5.5]

• [2.5, 3.5, 5.5]

• [4.5, 5.5, 3.5]

Which statement is the correct declaration and initialization of an ArrayList of String values?

• ArrayList<String> name; name = new ArrayList<String>();

• ArrayList name; name = new ArrayList<String>();

• ArrayList<String> name; name = ArrayList<String>();

• String<ArrayList> name; name = new String<ArrayList>();

Which statement below is the correct way to retrieve the first element in the nums ArrayList?

• nums.get(0)

• nums[0]

• nums(0)

• nums[1]

What is printed after executing code on the nums ArrayList with the values [3, 2, 4, 5, 7]?

• 5

• 4

• 6

• 7

What is the ArrayList nums if it is initially [5, 3, 1] and the following code is executed?
nums.add(6);
nums.add(0, 4);
nums.remove(1);

• [4, 3, 6]

• [5, 4, 6]

• [4, 6, 3]

• [3, 5, 6]

Given the nums ArrayList with the values [1, 2, 3, 4, 6], what code below can be used to add a 5 between the 4 and 6 in the list?

• nums.add(4, 5)

• nums.add(5, 4)

• nums.add(5, 5)

• nums.add(5)

What is printed?
ArrayList<Integer> alist;
alist = new ArrayList<Integer>();
alist.add(1);
alist.add(2);
alist.remove(1);
alist.add(1, 3);
alist.set(1, 4);
alist.add(5);
System.out.println(alist);

• [1, 4, 5]

• [1, 2, 3]

• [3, 4, 5]

• [1, 3, 5]

What will print when the following code executes?
ArrayList<Integer> list = new ArrayList<Integer>();
list.add(7);
list.add(8);
list.add(9);
System.out.println(list.remove(0));

• 7

• 8

• 9

• null