Objective 2.5 · Domain 2 · 13% of the exam

Implement prompt reuse strategies (caching, modular prompts, Skills)

Prompt reuse means caching stable prefixes so they are not re-billed and re-processed on every call, composing prompts modularly, and packaging repeated procedures so they can be invoked rather than restated. One mechanical detail decides most of these questions: ordering. A cache only helps if the stable part comes first and the variable part last, so a design that interleaves them gets no benefit however reusable it looks.

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The rest of domain 2: Models, Prompting & Context Engineering

This domain is 13% of a scored form, about 8 of the 63 questions, spread across 5 objectives. Drill the whole domain or pick another objective below.

2.1Select appropriate Claude models based on trade-offs(6)
2.2Design system prompts, templates, and guardrails(5)
2.3Apply prompt engineering techniques (zero-shot, few-shot, chain-of-thought)(5)
2.4Optimize context windows and manage token usage(5)

One objective is a narrow slice. A full-length timed mock is what tells you whether the whole thing holds together.

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