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Hardest Claude Certified Architect - Professional questions this week

These are the public diagnostic questions people are missing most often. Use the list as a weekly study loop: review the concept, then retake the diagnostic.

Weekly review loop

  1. Step 1Start with the most-missed topic and read the short answer explanation.
  2. Step 2Open the full breakdown for the concept before moving to the next topic.
  3. Step 3Retake the diagnostic and email the score report if you want the study plan.
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7d
practice sessions
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questions to review
Live weekly data is still filling in, so this page is showing the current high-signal review set.

Weekly report

Send the current weak-area list to yourself, then use the links as a study queue before your next diagnostic attempt.

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#1 most missed

Discovery & Requirements

Solution Design and Architecture
Review
high-signal topic

An executive asks for an autonomous agent to 'eliminate support backlog.' What should the architect establish before selecting a model or framework?

Correct answer
D. A measurable target, task boundaries, current process baseline, failure costs, decision rights, and escalation requirements

Architecture should follow a measurable operating problem and its constraints. Selecting technology before defining success and risk produces an untestable solution.

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#2 most missed

Model Routing & Governance

Claude Models, Prompting, and Context Engineering
Review
high-signal topic

A global platform wants to route requests among Claude models by task difficulty. What must accompany the router before production release?

Correct answer
C. Per-route eval thresholds, fallback behavior, observability, and change control for model or policy updates

Routing introduces a policy layer that can change quality and risk. It needs validated thresholds, monitored decisions, controlled fallbacks, and versioned changes.

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#3 most missed

RAG & Evaluation

Integration
Review
high-signal topic

A RAG assistant gives fluent wrong answers. Retrieval logs show that the correct passage was never returned. Which component should the team improve first?

Correct answer
B. The ingestion and retrieval layer, using relevance judgments and retrieval metrics before retuning generation

Generation cannot ground itself in evidence it never receives. Isolating retrieval quality from answer quality prevents prompt changes from masking the root cause.

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