Every RAG deployment runs on this math, and most candidates can't say why cosine beats Euclidean, or when the two are secretly identical. The 90-second version with a worked example.
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What does cosine similarity actually measure, and why is it the default for comparing embeddings?
Every RAG deployment runs on this math, and most candidates can't say why cosine beats Euclidean, or when the two are secretly identical. The 90-second version with a worked example.
Updated Aug 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.
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