Contact by the vendor. 1 phone screen. asking about my project, and 1 coding session. I am expecting a very tough scenario or edge case that I am gonna need to use advanced data structure like the stack, LinkedList , or algorithm. However the requirement is only to search by id, Me: if there a limit size of pallet? Interviewer: No Me: if there a concurrent scenario ? Interviewer:- No Me: Does it required first in first out or last in first out.? Interviewer:- No Me: if there a the diffenent type of pallet collection which need different implementation, So I might need to use interface or generic type Interviewer:- No Me: Only search by id? - yes ok I am implementing with a simple pure HashMap. The interviewer seems only interested in if I check null at each step. Totally no clue what is this interview looking for?. If you want to test if coder has clean code , algorithm, data structure, go ahead with leetcode medium to hard question. If you want to check if the candidate has the ability to solve a complex question, please give more difficult requirement. After finish all method I was ask how to find a total weight of all pallet loaded by time period! Ok, please if you need me to solve this question by algorithm or java ,golang code, please tell in the beginning, let's use some different data structure. Otherwise, lets use something called Database query. After getting the reject email. I am asking if the recruiter can forward feedback, no response.