CGI Software Developer interview questions

I attendend the online test in amcat and the test seems easy but you should get max score and in the coding i executed both questions with 90% test cases but i didn't get shortlisted.

It's very polite and respectful, Total three steps process 1st and 2nd technical Final round was Hr round. Technical round they will ask c++ and Ds They're asking me to write codes on python and c++. Data structure and algos Puzzle solving I wirtten python script and explain the logic as well DS:I explained upto linked list and double linked list.