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Exam Code: CCA-F

Exam Name: Claude Certified Architect - Foundations

Certification Provider: Anthropic

Anthropic CCA-F Questions & Answers

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Anthropic CCA-F Practice Test 9

Question 80

A developer says 'add comprehensive tests' for an unfamiliar legacy application. The repository's services, data flow, and critical paths are not documented. How should the Claude Code coordinator begin?

  1. Skip the repository inspection and ask Claude to infer all service boundaries from the project title.
  2. Inventory the architecture and risky paths first, then decompose the test work according to observed dependencies.
  3. Immediately launch one test-writing agent per file without inspecting shared dependencies.
  4. Write a fixed set of generic happy-path tests and declare the entire legacy system covered.

Explanation

Correct Answer

B:

The requested outcome is broad, but the system lacks the evidence needed to choose useful test boundaries. An initial repository map can identify services, public interfaces, data persistence, and high-risk flows before generating unit and integration tasks. With that information, the coordinator can prioritize realistic test gaps and avoid duplicate coverage across specialists. Adaptive decomposition follows what the codebase actually contains rather than assuming that a generic fixed test list is comprehensive.

Incorrect Answers

A:

A project title is too weak to establish real APIs, data models, or execution paths. Tests based on imagined dependencies may not compile or exercise meaningful behavior. Authorized code navigation and architecture inventory provide the evidence required to plan effective tests for the actual application.

C:

File count does not describe the application's risk boundaries or integration contracts. Blind fan-out may generate many shallow unit tests while missing critical workflows that span modules. The coordinator should understand the architecture before deciding which tasks can safely run independently and which require coordinated integration tests.

D:

A few standard tests cannot establish comprehensive coverage in an unknown architecture. Hidden background jobs, external dependencies, and failure paths may be more important than obvious functions. The coordinator should map these areas and then select tests based on concrete behavioral risks rather than a reusable checklist alone.

Question 81

A CI review uses separate specialists for five changed modules. They catch individual style issues, but a changed interface between two modules breaks runtime tests. Which TWO review layers are required? Select TWO answers.

  1. Perform bounded per-file checks and retain each module's local findings.
  2. Run a cross-module compatibility pass against shared interfaces after the local analyses.
  3. Approve the pull request when every file independently passes its linter.
  4. Discard local checks and trust one broad integration run to detect every possible file defect.
  5. Have all specialists edit the same shared interface concurrently without coordinated review.

Explanation

Correct Answers

A:

File-level review establishes whether changed code follows its own syntax, lint, and local test expectations. Each specialist can analyze a well-defined module and return the defects it observed with paths and evidence. Those results give the coordinator reliable inputs for the overall pull-request review. They do not, by themselves, prove that imports, shared data types, and other contracts between modules still work, so they must be paired with an integration layer.

B:

An integration reviewer can compare the changed producer and consumer APIs, exercise relevant runtime tests, and verify that fixtures and configuration remain compatible. This addresses the actual defect that local style checks missed. The coordinator should wait for the necessary file-level inputs before assessing interactions and declaring the pull request ready. Together, the two layers provide both local quality evidence and explicit coverage of relationships spanning the five modules.

Incorrect Answers

C:

A linter evaluates local syntax or style rules, not necessarily the behavior of dependent modules. A changed interface can be perfectly lint-clean while breaking a consumer at runtime. The scenario already demonstrates why all-green local checks cannot substitute for integration validation.

D:

Integration tests can miss local quality issues, unusual branches, or tooling violations that a targeted per-file review catches efficiently. The pipeline needs both scopes rather than treating them as interchangeable. Preserving file-specific findings also helps locate the origin of any cross-module failure.

E:

Concurrent uncoordinated edits can introduce new conflicts and obscure which change caused the runtime failure. The task is to assess a pull request, not create competing modifications. An accountable coordinator should integrate reviewed results and schedule approved fixes with appropriate dependencies.

Question 82

Two code-review specialists are assigned identical test-directory searches. Both return the same assertions, while neither examines service configuration that affects runtime behavior. What is the best task-allocation correction?

  1. Keep both agents on the same directory because duplicate findings always count as independent validation.
  2. Remove runtime configuration from the review because the existing tests have assertions.
  3. Let each specialist choose any files with no coverage map or acceptance criteria.
  4. Partition delegated investigations by distinct components and required evidence, including runtime configuration coverage.

Explanation

Correct Answer

D:

The duplicate test-directory work consumes capacity without increasing coverage. The coordinator should specify separate ownership, such as test behavior for one specialist and service configuration or deployment assumptions for the other, with clear expected outputs. That division yields complementary findings and exposes missing runtime dependencies. A final integration step can relate the test observations to the configuration rather than allowing both workers to report identical local evidence.

Incorrect Answers

A:

Independent corroboration can be useful when deliberately requested, but the scenario has an uncovered configuration area and a finite review budget. The two agents are repeating the same narrow checks without addressing the broader task. Distinct scoped assignments would improve information coverage more than an accidental duplicate pass.

B:

Test assertions may rely on environment variables, feature flags, or service endpoints configured outside the test directory. If those assumptions change, runtime behavior can break even when tests look correct in isolation. The coordinator should include configuration analysis rather than equating test-code inspection with system-wide validation.

C:

Unbounded delegation caused the overlapping work in the first place. Without specified responsibilities, both agents may gravitate toward the same visible tests again. The coordinator should define evidence targets and verify that important components such as runtime configuration are assigned to someone.

Question 83

An initial codebase survey finds that a payment workflow has no integration tests, while several low-impact utility modules already have thorough unit coverage. Which task should the coordinator prioritize next?

  1. Prioritize integration coverage for the uncovered payment path using the new dependency and risk evidence.
  2. Generate additional tests for the already well-covered utilities because those tasks are easiest.
  3. Ignore the survey and assign equal test effort to every module regardless of risk.
  4. Declare testing complete because the repository already contains many unit tests.

Explanation

Correct Answer

A:

Adaptive planning should respond to the actual gaps found during repository inspection. A payment workflow has consequential side effects and may cross multiple services, so a missing integration test represents a material risk not addressed by utility unit tests. The coordinator should map its authorization and failure boundaries, then schedule tests for those interactions before spending effort on already well-covered helpers. This links test allocation to business impact and discovered architecture rather than raw file counts.

Incorrect Answers

B:

Ease of generation does not indicate the most valuable coverage improvement. The survey explicitly identifies a high-impact payment path that has no integration protection. More redundant utility tests could inflate counts while leaving an important financial behavior unvalidated across its dependencies.

C:

Equal effort may be simple to schedule, but it treats critical transaction flows and low-impact helpers as equivalent. The newly discovered coverage map provides a concrete basis for prioritization. The coordinator should concentrate resources where a failure would be costly and existing tests are insufficient.

D:

An aggregate test count says little about whether the payment path's cross-service behavior has been exercised. The missing integration coverage is a specific gap revealed by the inventory. Completion should be judged against critical workflows and acceptance criteria, not the quantity of unrelated passing tests.

Question 84

A developer identifies a one-character typo in a known validation branch and already has a failing regression test that pinpoints the behavior. The orchestrator proposes launching six discovery specialists before editing. What is preferable?

  1. Assign every specialist permission to modify the same validation branch simultaneously.
  2. Apply the localized correction directly under normal review controls and rerun the targeted regression test.
  3. Launch a full repository investigation before changing any single known typo, regardless of evidence.
  4. Skip the regression test because the edit is only one character long.

Explanation

Correct Answer

B:

The task is already narrowly understood: a specific validation branch is wrong and a regression test demonstrates the expected behavior. Additional architecture mapping and multiple research agents would create coordination overhead without resolving meaningful uncertainty. A small scoped edit followed by the failing test and relevant nearby checks is the proportionate workflow. Escalate the plan only if the fix exposes a broader dependency or the regression result contradicts the initial diagnosis.

Incorrect Answers

A:

Concurrent edits to one small location invite conflicts and obscure which change produced the observed behavior. There is no independent work to parallelize in the stated defect. One authorized implementation path and targeted validation are clearer and easier to audit.

C:

A broad survey is useful for unfamiliar, cross-cutting work but not automatically for a well-isolated defect with a regression test. The proposed specialists add latency and can produce irrelevant observations. The coordinator should match decomposition depth to uncertainty and impact rather than using the largest workflow for every change.

D:

Patch size does not prove behavioral correctness. The existing failing test offers a direct way to confirm that the change fixes the intended validation behavior and does not merely alter text. The localized workflow remains responsible for testing despite avoiding an unnecessary research pipeline.

Question 85

During an application migration review, an agent discovers an undocumented background job that still writes the old record format. The original plan includes only the main service and API clients. What should the coordinator do?

  1. Delete the job immediately without checking whether users or services depend on its output.
  2. Ask the model to assume the job automatically adopts the new schema when the API changes.
  3. Revise the dependency graph to include the job and schedule the newly necessary format and integration checks.
  4. Leave the task graph unchanged because the background job was absent from the initial requirements.

Explanation

Correct Answer

C:

A discovered data writer can invalidate the migration plan if it continues producing records in an obsolete schema. The coordinator should update its understanding of producers and consumers, determine how the background job interacts with the new format, and add relevant validation before implementation is declared safe. Adaptive decomposition exists to incorporate such evidence. Ignoring the new dependency would leave a known route for incompatible data even if the main service and API clients were updated correctly.

Incorrect Answers

A:

An undocumented job may still implement important business behavior, so deleting it is not a safe substitute for dependency analysis. The coordinator should establish ownership, output contracts, and migration effects before approving a change. A destructive shortcut could fix one schema conflict while causing a separate production outage.

B:

The scenario says the job writes the old format independently, so an API modification does not prove its behavior will change. The migration needs explicit compatibility work or replacement of that producer. Assumptions about automatic adaptation would conceal a known integration gap.

D:

An initial plan is based on incomplete knowledge of the legacy system. Once a real dependency is discovered, the correctness of the migration depends on addressing it. Treating the original outline as immutable would knowingly allow a format-mismatched writer to remain active after rollout.

Question 86

A refactor pipeline generates service stubs from a new database schema. The schema migration has not been applied yet, so attempts to compile the stubs fail. How should its task graph be corrected?

  1. Regenerate the same stubs repeatedly while leaving the database schema unchanged.
  2. Mark compilation successful because the generation tool returned text files.
  3. Run the schema migration after deploying the incompatible stubs to production.
  4. Make successful migration and schema verification an explicit prerequisite of dependent stub generation and compilation.

Explanation

Correct Answer

D:

A generated stub is only compatible with the database structure it targets. The coordinator should represent the migration as an upstream dependency, verify that the expected schema exists, and then run code generation and compilation checks. Unrelated preparation can happen in parallel, but the dependent build must wait for the required schema state. This makes the workflow failure predictable and recoverable rather than repeatedly launching code generation against an incompatible environment.

Incorrect Answers

A:

Code generation cannot satisfy references to tables or fields that do not yet exist in the target schema. Repetition adds cost without resolving the missing prerequisite. The pipeline must establish the required migration state before evaluating generated code that depends on it.

B:

File creation is not proof that the generated code compiles or matches deployed schema contracts. The scenario explicitly reports compilation failure. A valid completion check must include prerequisite migration verification and actual build results, not only the presence of generated artifacts.

C:

Deploying consumers before their schema prerequisites can cause runtime errors and data inconsistencies. The task graph needs the migration and compatibility checks ahead of dependent code deployment. A carefully planned migration may use phased compatibility, but this scenario provides no such safe intermediate contract.

Question 87

Three documentation files in unrelated modules need independent wording updates. None shares generated assets or interfaces, and the coordinator must combine the results into one review. How can latency be reduced safely?

  1. Delegate the isolated file edits concurrently, then gather diffs and perform a single final review.
  2. Serialize every documentation edit solely because multiple specialists are available.
  3. Give all three workers permission to rewrite the entire repository while they edit their assigned file.
  4. Skip the final review because individual documentation tasks do not affect code execution.

Explanation

Correct Answer

A:

The edits have no stated dependencies, so parallel workers can operate on separate paths with explicit scopes. Each should return its changed file, summary, and relevant validation status. The coordinator then checks consistency, unintended changes, and merge readiness before declaring the documentation update complete. This shortens the critical path without allowing workers to edit overlapping files or bypass final integration and ownership checks.

Incorrect Answers

B:

Independent work need not wait for earlier unrelated wording changes. Strict serialization would increase completion time without reducing conflicts because the files do not overlap. The coordinator should reserve sequencing for dependent steps and use one aggregation pass to maintain a coherent final change set.

C:

The legitimate work is limited to three known documentation files, so unrestricted mutation adds unnecessary risk. Parallelism is safe only with clear ownership and bounded permissions. The coordinator should constrain each worker to its specified file and inspect the combined result before approval.

D:

Documentation changes can still introduce conflicting guidance, broken links, or unintended edits. Individual workers may use inconsistent terminology across modules even when files do not overlap. A lightweight integration review checks the combined deliverable without requiring an expensive sequential editing pipeline.

Question 88

A search specialist is asked to 'summarize the whole internet' for a report on a product's regulatory approval. It consumes its context budget on unrelated history and never locates the actual approval records. What is a better delegation brief?

  1. Ask every specialist to search unrelated historical topics to ensure maximum breadth.
  2. Specify the concrete approval question, permitted source family, evidence fields, and bounded result scope.
  3. Increase the maximum context length and leave the unbounded search request unchanged.
  4. Remove all source requirements and allow the specialist to infer regulatory approval from marketing language.

Explanation

Correct Answer

B:

A specialist works more effectively when its task identifies the decision it must support and the evidence needed for that decision. The coordinator can ask for current regulatory approval records, dates, jurisdiction, agency, and direct references rather than an open-ended history of the web. Source boundaries and output limits reduce irrelevant exploration while preserving citations. The returned findings then map to a specific reporting requirement instead of consuming context on information the user did not request.

Incorrect Answers

A:

Breadth has value only when it contributes to the requested question. The current worker already wasted its budget on unrelated history, so expanding that behavior would deepen the failure. Concrete outcomes and restricted source families are a better match for an approval-focused research task.

C:

A larger context window may allow more irrelevant pages to accumulate, but it does not define which records answer the approval question. The task's lack of focus is the root cause. The coordinator should narrow the evidence requirement before spending more retrieval resources.

D:

Product marketing does not necessarily establish official authorization in each relevant jurisdiction. The report asks for regulatory approval records that require a defensible source trail. The coordinator should target appropriate agency documents instead of substituting plausible promotional claims for evidence.

Question 89

A development coordinator splits a moderate module review into twenty micro-agent tasks. Their outputs overlap, and the coordination cost exceeds the time required for one coherent review. What adjustment best fits the evidence?

  1. Remove all integration responsibility and let each tiny worker publish independent conclusions.
  2. Keep every microtask unchanged and add an unlimited retry loop when the results conflict.
  3. Merge the microtasks into a few accountable module-level assignments with a single integration owner.
  4. Double the number of micro-agents so each overlapping finding can be repeated more often.

Explanation

Correct Answer

C:

Useful decomposition should reduce uncertainty or enable meaningful parallelism, not maximize the number of agents. Here the task boundaries are too small and overlapping, so the coordinator spends more effort deduplicating fragments than examining code. Grouping related checks into coherent modules preserves local context and makes output ownership clear. A final integration pass can compare the limited set of findings and reduce contradictory edits without losing important review coverage.

Incorrect Answers

A:

Isolated fragments do not establish overall module correctness, especially when specialists review overlapping paths. Without an integrator, contradictions and repeated recommendations can reach the user unchecked. Coherent assignments plus a clear final owner address both task overhead and output quality.

B:

Retries do not correct duplicated scopes or absent ownership, and they could consume more time while returning the same inconsistent fragments. The demonstrated problem is structural over-decomposition. The coordinator should consolidate related tasks and resolve the review against a shared acceptance standard.

D:

More workers would increase coordination and duplication, which are already the observed bottlenecks. Unless tasks are independent and well scoped, parallelism can make the workflow slower rather than faster. The coordinator needs better task granularity and ownership, not a larger agent count.

Question 90

A developer plans to refactor an unfamiliar monorepo. Public APIs and package dependencies are not mapped, yet an agent proposes editing the first module that matches a keyword. What should happen first?

  1. Change the first matching file immediately and assume other packages will adapt automatically.
  2. Restrict investigation to the selected module's comments without inspecting imports or consumers.
  3. Delegate independent edits to all packages in parallel before establishing shared interface contracts.
  4. Inventory packages, service boundaries, public callers, and dependencies before selecting a refactor target.

Explanation

Correct Answer

D:

A refactor in a monorepo can affect consumers well beyond the first matching source file. A breadth-first inventory gives the coordinator an evidence-based view of which interfaces are public, which packages depend on them, and where tests or generated contracts reside. The plan can then prioritize a change with a known blast radius and add integration checks. This reduces the risk of locally correct edits that silently break dependent services.

Incorrect Answers

A:

A keyword match identifies a possible location, not the complete dependency graph for a public API. Other modules may import the function or rely on its behavior. Editing before mapping callers can produce regressions that a narrow local test never exercises.

B:

Comments can be stale and do not reveal every runtime or compile-time dependency. The scenario emphasizes unknown package boundaries and public interfaces, which require code and build graph inspection. The coordinator should gather structural evidence before defining the change scope.

C:

Without a common view of dependencies, parallel workers may make incompatible assumptions and break one another's consumers. The resulting integration conflicts would be harder to resolve than a planned change. The coordinator should establish the relevant contracts and task boundaries before authorizing broad mutations.

Claude Certified Architect - Foundations (CCA-F) Practice Tests