HackerRank Online Assessment consisting of two DSA questions. LeetCode difficulty would be medium, but if you're familiar with the subject, it bumps down to easy. The assessment is doable within a reasonable timeframe; I completed both with half the time left.
See the Blind 75, or preferably, NeetCode 150, which is more than enough.
The following metrics were computed from 1 interview experience for the Citadel Software Engineer (Internship) role in Iceland.
Citadel's interview process for their Software Engineer (Internship) roles in Iceland is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Citadel's Software Engineer (Internship) interview process in Iceland.