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mediumOpenAI

Implement cd(current_dir, new_dir) returning the absolute path, then add symbolic links

cd('/foo/bar', 'baz') is easy. cd('/foo/../', './baz') is where the OpenAI screen actually starts, and the symlink follow-up is where it ends. The stack solution plus the loop-guard most candidates forget.

Updated Sep 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.

cd('/foo/bar', 'baz') is easy. cd('/foo/../', './baz') is where the OpenAI screen actually starts, and the symlink follow-up is where it ends. The stack solution plus the loop-guard most candidates forget.

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