Amplitude Software Engineering Intern interview questions

Coding question: 1. how to remove duplicates from a list 2. input: a list of sticks with color on either end (ex. (cyan, violet)), and write an algorithm to find a sequence where each end of the stick is lined up with their corresponding color (ex. (cyan, violet) - (violet, red) - (red, blue)). Return the sequence if it exists, otherwise return "impossible" Behavioral: What was your biggest challenge during your last work experiences? What are some of the things you want to achieve at our company?