Solutions:
Check these solutions from our community and artificial intelligence:
The candidate's solution correctly finds the first non-repeating character in a string. The solution uses a hash map to keep track of the number of times each character appears in the string, then loops through the string again to find the first character that only appears once.
This is a solid solution that correctly solves the problem. The candidate demonstrates a good understanding of how to use hash maps and how to loop through a string.