Process
The first stage includes two interviews: a code interview and a research interview.
The code interview was supposed to include code questions. However, the interviewers dedicated most of the time to asking about previous experiences, leaving only 10 minutes at the end to solve the lowest common ancestor problem in binary trees. This is hardly enough time to solve that kind of question.
Questions
Given a binary tree and two nodes in the tree, write an algorithm that finds the nodes' lowest common ancestor in the tree.
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Interview Statistics
The following metrics were computed from 1 interview experience for the IBM AI Researcher role in Israel.
Success Rate
IBM's interview process for their AI Researcher roles in Israel is extremely selective, failing the vast majority of engineers.
Experience Rating
Candidates reported having very negative feelings for IBM's AI Researcher interview process in Israel.
IBM Work Experiences
- 4.0n.aAI Researcher • Current EmployeeBangalore Rural, Karnataka, IndiaSeptember 19, 2025Pros: Amazing environment. Good development for interns. Honest work is appreciated.Cons: Maybe work overload, but it depends on your team.
- 5.0A good place to work atAI Researcher • Current EmployeeHaifa, Northern District, IsraelJune 26, 2025Pros: Strong co-workers. Cutting-edge technologies. Work-life balance.Cons: Compensation and Benefits - not bad, but not great either.
- 4.0Good place to work atAI Researcher • Former EmployeeHaifa, IsraelNovember 24, 2021Pros: - Good research-product balance. - Great co-workers.Cons: - I did not like the product. - Salary could be higher.
IBM Interview Questions
