AI Engineering.

Building production applications powered by AI models and APIs. Covers 12 sub-skills.

• AI Engineering · 1 of 3

  API Integration (OpenAI, Anthropic)

  When the Anthropic Messages API returns HTTP 429, which response header is the documented signal for when to retry?

  Aanthropic-retry, expressed as seconds to waitBx-throttle-reset, expressed as seconds to waitCretry-after, expressed as seconds to waitDx-ratelimit-wait, expressed as seconds to wait

• AI Engineering · 2 of 3

  Vector Databases & Embeddings

  What three measures do vector databases use to compare embeddings?

  APearson correlation, KL divergence, and Wasserstein distanceBJaccard index, Hamming distance, and Manhattan distanceCBM25 score, TF-IDF weight, and edit distanceDCosine similarity, Euclidean distance, and dot product

• AI Engineering · 3 of 3

  Context Window Management

  Cache hit rate on Anthropic was 90% in dev and dropped to 5% in prod after a feature flag added a per-tenant header summary at the top of the system prompt. Best fix per current guidance?

  Araise the model's max output tokens to compensate the lossBmove the per-tenant block below the cache breakpointCrotate the API key per tenant for stronger cache isolationDsplit the corpus across two parallel calls and merge later