It depends on the rotational program. Many rotational programs send you through different functional areas, which depending on the company may or may not include much internal strategy. Rotational programs do tend to focus on discrete "projects" during the rotations though, so in that sense they may seem a little like internal strategy groups. That said though, rotational programs and internal strategy will vary by company, so the best approach is probably to think through what companies/industry you're interested in then research the specifics for those companies.