Know your DS&A. It is tested during every interview.
Finals were LC-medium/hards. OS trivia may also be asked. They also ask about your previous experience.
LeetCode Style Questions: Graph and DP
The following metrics were computed from 18 interview experiences for the Citadel Software Engineering Intern role in United States.
Citadel's interview process for their Software Engineering Intern roles in the United States is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Citadel's Software Engineering Intern interview process in United States.