Consider the following code segment:

ArrayList nums = new ArrayList ();
nums.add(10);
nums.add(20);
nums.add(30);
nums.add(40);
nums.add(50);
int x = nums.remove(3);
int y = x + nums.remove(0);
int z = x + y;
nums.add(2, z);
Which of the following represents the value of nums after the code segment has been executed?

[20, 40, 90, 50]

[10, 20, 30, 40, 50]

[20, 30, 90, 50]

[20, 40, 50, 90]

[20, 30, 80, 50]

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MrRoyal MrRoyal · Answer 1 · 2022-03-02T11:39:03+01:00

ArrayLists are arrays that can be resized

The list that represents the value of nums after executing the code segments is [20, 30, 90, 50]

From lines 1 to 5 of the program, the content of the nums list is:

nums = [10, 20, 30, 40, 50]

Next, the element at the 3rd index is removed and saved in x.

So, we have:

nums = [10, 20, 30, 50]

x= 40

Next, the element at the 0 index is removed and then added to x.

The result is then saved in y

So, we have:

nums = [20, 30, 50]

y= 50

x = 40

The values of x and y are added and then inserted at the 2nd index of the arraylist.

So, we have:

nums = [20, 30, 90, 50]

Hence, the list that represents the value of nums is [20, 30, 90, 50]