The interview was behavioral and technical, all in one call.
They have a general posting now for interns (at least for Markham). Everyone applies to one posting, and then different departments have access to the postings and pick out candidates to interview.
Asked about my past experience, specifically:
The following metrics were computed from 4 interview experiences for the IBM Software Developer Intern role in Markham, Canada.
IBM's interview process for their Software Developer Intern roles in Markham, Canada is very selective, failing most engineers who go through it.
Candidates reported having very good feelings for IBM's Software Developer Intern interview process in Markham, Canada.