The test example is correct; the sums of those two arrays are 0, 4, 0, 4, 0, 4. Since there are an equal number of each sum (0 and 4), the larger sum (4) is selected and the pairs that add up to that ([ [ 0, 4 ], [ 2, 2 ], [ 5, -1 ], [ -2, 6 ] ]) are returned.

the sum of the corresponding position

I believe the last example test should yield a different answer, if I'm not mistaken?

//input
arr1=[1,2,3,0,5,-2]
arr2=[-1,2,-3,4,-5,6]

//expect
[ [ 0, 4 ], [ 2, 2 ], [ 5, -1 ], [ -2, 6 ] ]