Recent google interview experience for Google Cloud AI engineer role

My recent interview experience for Cloud AI engineer role
Role Related Knowledge
Here the she asked all the AI related terms defination, she was mostly interested in prompt injection , system instructions how they impact to AI.
Onsite DSA interview question
It was an array question given an array [3,1,2,4,5]. you need to calculated the maximum sum of subarray but to calculate the subarray sum you have to add the first and last element of the subarray and subtract the sum of middle elements.
[3,1,2,4] 4+3 - (1+2) = 4
best valid subarray was [4,5] with answer 9

this was the only question asked , i could solve the question using curr_sum and max_sum for the array, suggested optimised approach using prefix sum logic. Was not selected due to some bugs in code.Hope it helps for anybody preparing