one question was as under -
"Symmetric Difference of Arrays"
Input: two arrays of integers
Output: one array of integers
which occur in only one (not both) arrays
Test case:
Input: [ 1, 7, 8, 2, 4, 5 ]
[ 3, 5, 1, 7, 6, 9 ]
Output: [ 8, 2, 4, 3, 6, 9 ]