Exam CCAR-F Topic 1 Question 6 Discussion

Actual exam question for Anthropic's CCAR-F exam
Question #: 6
Topic #: 1
Your pipeline reviews approximately 200 database-migration scripts daily using the Message Batches API. Each request includes a shared 8,000-token system prompt containing migration- review guidelines and schema documentation, followed by an individual migration script. You added cache_control breakpoints to the shared system prompt in every request, but monitoring shows cache-hit rates of only 32%, with misses concentrated among requests processed later in the batch window. Which change addresses the root cause without adding sequential-processing latency?

Suggested Answer: D Vote an answer

Option D directly addresses cache entries expiring before later batch requests are processed.
Anthropic's batch-processing documentation specifically notes that Message Batches can take longer than five minutes and recommends the one-hour prompt-cache duration for batches containing shared context. The prompt-caching documentation confirms that the default TTL is five minutes and that "ttl": "1h" creates an extended entry.

by Rex at Sep 13, 2026, 12:17 PM

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