Sum of two arrays not understanding

#1

Please explain the output of the sample. What is meant by sum of arrays?

#2

@rishabhsetiya7
Consider two Arrays
arr1={1,2,4};
arr2={3,1,7};
The resultant array {4,4,1} is Sum of two Arrays from Right to Left,just like normal addition is done.

#3

3+1=4 I understood, but how is 2+1=4 and 7+4=1? In case you really meant element adding element by element.