Online test, HackerRank. Typically 2 questions on HackerRank, one was easy and the other was LeetCode hard. Don't spend too much time on one of the questions. Divide your time accordingly.
LeetCode easy question for trees
The following metrics were computed from 1 interview experience for the Citadel Software Engineering Intern role in Australia.
Citadel's interview process for their Software Engineering Intern roles in Australia is extremely selective, failing the vast majority of engineers.
Candidates reported having mixed feelings for Citadel's Software Engineering Intern interview process in Australia.