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Anthropic CCA-F Practice Test 36

Question 350

A plan identifies a critical uncertainty that cannot be resolved from the repository. Which use of plan mode is justified here?

  1. Use plan mode first to inventory changes and validate a migration approach
  2. Modify the authoritative generator inputs and rerun code generation with targeted compatibility checks
  3. Inspect affected interfaces and obtain a plan before mutating dependent modules
  4. Surface the unresolved dependency rather than silently choose an assumption

Explanation

Correct Answer

D:

A plan identifies a critical uncertainty that cannot be resolved from the repository. The relevant control is to surface the unresolved dependency rather than silently choose an assumption. A safe plan names what is unknown and prevents unsupported changes. Keep noninteractive execution, machine-readable results and exit status consistent for automated CI review.

Incorrect Answers

A:

Planning reduces unintended broad edits when architecture and dependencies are uncertain. This is not a substitute for “Surface the unresolved dependency rather than silently choose an assumption”; that control is necessary in the stated circumstances. A safe plan names what is unknown and prevents unsupported changes.

B:

Generated artifacts should be derived from their sources so regeneration will not silently overwrite a one-off manual edit. Here, a plan identifies a critical uncertainty that cannot be resolved from the repository. Surface the unresolved dependency rather than silently choose an assumption. A safe plan names what is unknown and prevents unsupported changes.

C:

Reviewing compatibility and rollback scope prevents accidental consumer breakage. The proposed option cannot provide the specific “Surface the unresolved dependency rather than silently choose an assumption” behavior that the case requires. A safe plan names what is unknown and prevents unsupported changes.

Question 351

A planning session suggests an expensive rewrite for a minor feature. What should the team require before execution?

  1. Use plan mode to inspect dependencies and agree on the implementation sequence
  2. Use plan mode to evaluate trade-offs and capture decision criteria
  3. Explore dependencies and rollback constraints in plan mode before changes
  4. Compare minimal viable changes, estimated risk and validation coverage against the rewrite

Explanation

Correct Answer

D:

Planning is valuable only when it leads to proportionate decisions. An oversized solution should be challenged with simpler alternatives. Compare a minimal compatible change with a full rewrite using concrete risk, maintenance and test coverage estimates. Rewriting stable modules for a small feature increases scope without proving better business value.

Incorrect Answers

A:

Plan mode is the context in which the proposed rewrite was discussed; invoking it again is not the decision criterion. Compare the minor feature's required behavior with a smaller feasible change, assess regression risk, and choose the least disruptive implementation that can be verified.

B:

Architectural questions require comparison and assumptions. The decisive requirement here is to choose proportionate implementation scope. Plan-mode analysis alone does not justify an expensive rewrite. Compare the minimal viable solution and its measurable risks before selecting broad replacement work.

C:

Schema removal can affect multiple consumers. This capability does not directly choose proportionate implementation scope. A dependency inventory can matter for a migration, but the question asks whether a minor feature merits a rewrite at all. Compare limited alternatives and validation cost before expanding scope.

Question 352

A proposed cross-service change lacks any reference to the current repository or tests. What is missing?

  1. Keep planning separate until explicit approval is recorded for execution
  2. Use direct execution when the required change and verification path are unambiguous
  3. Choose authentication files from memory, assume their owners and tests are unchanged, and approve the plan without inspecting the repository
  4. Ground the plan in inspected source paths and a verification strategy

Explanation

Correct Answer

D:

A useful plan is tied to actual system constraints, not generic architecture language. Concrete affected files and tests make execution credible. A workable plan names actual source files, affected interfaces and the tests that will verify the change. Generic steps without repo inspection cannot demonstrate that the proposed modification fits the current implementation.

Incorrect Answers

A:

A design document is not authorization to perform side effects. This alternative does not establish how to anchor plans to real code and acceptance tests in the stated workflow.

B:

The error points to a specific bounded correction. Although useful elsewhere, it is not the direct mechanism to anchor plans to real code and acceptance tests.

C:

Memorized paths or yesterday’s ownership assumptions may not match the current codebase. A valid cross-service plan must inspect affected source files, interfaces and tests, document the observed dependencies and name a concrete verification path. Substituting remembered authentication paths cannot establish which components the proposed change actually touches.

Question 353

A code generator repeatedly makes inconsistent API responses despite a long abstract prompt. What change can improve it?

  1. Add representative boundary-case tests derived from the declared schema
  2. Return the exact relevant compiler error to the next correction iteration
  3. Provide representative input/output examples and explicit testable invariants
  4. Fix and verify the shared helper first before patching dependent callers

Explanation

Correct Answer

C:

Concrete examples communicate expected shape and edge cases more directly than vague style instructions. Automated tests should verify whether the revision works. Representative examples should show both normal and edge-case API responses and make required invariants measurable. Longer prose alone often cannot clarify conflicting output conventions.

Incorrect Answers

A:

A good eval harness catches omissions and regressions. That addresses a different part of the system, not the requirement to improve generation with concrete acceptance examples.

B:

Include the exact relevant compiler diagnostic and the current code context in the next bounded correction attempt. The direct remedy is “Provide representative input/output examples and explicit testable invariants”, which the alternative does not itself accomplish. Concrete examples communicate expected shape and edge cases more directly than vague style instructions.

D:

Repairing the root dependency may resolve several symptoms. This capability does not directly improve generation with concrete acceptance examples. A shared-helper defect is a coding problem, but the observed inconsistency is generated API response shape. Concrete examples and invariants guide the model and make output testable.

Question 354

Claude Code implements a parser that fails one test and immediately rewrites unrelated modules. What iteration method is better?

  1. Use the failing test output to make a small targeted correction and rerun it
  2. Test externally specified missing-field and malformed-input cases that were not derived from the implementation
  3. Address independent issues in bounded batches with targeted checks, then run an integrated suite
  4. Run relevant regression and integration checks across affected consumers

Explanation

Correct Answer

A:

Iterative refinement should be driven by observable failure evidence. Broad unrelated changes increase regression risk and hide the root cause. Use the failing parser test to identify a narrow defect and correct that path first. Broad unrelated rewrites increase regression risk and make it harder to attribute whether the fix worked.

Incorrect Answers

B:

Self-generated happy-path fixtures can repeat the same false assumptions as the parser. It would leave the stated need to keep fix cycles focused on measured failures unresolved.

C:

Grouped fixes can improve efficiency when independent, but integration must still be validated. The decisive requirement here is to keep fix cycles focused on measured failures.

D:

A local test validates only a narrow behavior. This alternative does not establish how to keep fix cycles focused on measured failures in the stated workflow.

Question 355

A pull request has three unrelated lint warnings and a failing integration test. How should work be organized?

  1. Fix and verify the shared helper first before patching dependent callers
  2. Use the failing test output to make a small targeted correction and rerun it
  3. Run relevant regression and integration checks across affected consumers
  4. Address independent issues in bounded batches with targeted checks, then run an integrated suite

Explanation

Correct Answer

D:

Grouped fixes can improve efficiency when independent, but integration must still be validated. Conflating unrelated failures obscures causality. Separate independent lint cleanups from the integration defect and record which checks passed after each edit. Run the full suite before calling the combined pull request ready.

Incorrect Answers

A:

Fixing a shared helper first makes sense when several failing callers share one root cause. Here the pull request has unrelated lint warnings and a separate integration failure. Tackle independent issues in bounded changes with focused checks, then rerun the integration suite to avoid conflating causes.

B:

Iterative refinement should be driven by observable failure evidence. Although useful elsewhere, it is not the direct mechanism to batch independent corrections while retaining integration checks.

C:

A passing focused test verifies one behavior, not every consumer of a shared formatter. The proposed option cannot provide the specific “Address independent issues in bounded batches with targeted checks, then run an integrated suite” behavior that the case requires. Separate independent lint cleanups from the integration defect and record which checks passed after each edit.

Question 356

Two failing tests share the same broken core helper. What change order is appropriate?

  1. A concise execution ledger recording completed edits, test outcomes and unresolved work
  2. Fix and verify the shared helper first before patching dependent callers
  3. Add representative boundary-case tests derived from the declared schema
  4. Address independent issues in bounded batches with targeted checks, then run an integrated suite

Explanation

Correct Answer

B:

Repairing the root dependency may resolve several symptoms. Modifying every caller first wastes effort and introduces inconsistent workarounds. Fix the shared helper before patching every dependent test or caller. Otherwise multiple local workarounds may mask the root error and create divergent behavior across modules.

Incorrect Answers

A:

Progress evidence makes restarts and final audits reliable. That addresses a different part of the system, not the requirement to repair common causes before downstream symptoms.

C:

Boundary-case tests strengthen input validation, but two existing failures both trace to one shared helper. Repair and verify that helper first, then rerun dependent tests; writing unrelated boundary tests before correcting the common defect may leave both original failures intact.

D:

Batched independent fixes help when failures have different causes. These tests share a broken helper, so scattering changes across callers risks masking the underlying defect. Fix the common implementation once, validate it directly and then confirm both dependent tests pass.

Question 357

A user requests a new dashboard but leaves unclear audiences, data availability and success criteria. How should the agent begin?

  1. A concise execution ledger recording completed edits, test outcomes and unresolved work
  2. Return the exact relevant compiler error to the next correction iteration
  3. Ask focused design questions to resolve consequential ambiguities before generating implementation
  4. Test externally specified missing-field and malformed-input cases that were not derived from the implementation

Explanation

Correct Answer

C:

A few targeted questions can prevent wasted coding on the wrong requirements. The answers should become a concrete acceptance contract. Ask for the intended audience, available data and acceptance criteria because they materially affect dashboard design. Inventing these choices could deliver a technically correct but useless interface.

Incorrect Answers

A:

An execution ledger records what an agent has done, but it cannot resolve absent information about a new dashboard's audience, data sources or success metrics. Ask targeted design questions before generating the dashboard to avoid building an untestable or unsuitable interface.

B:

A compiler error is useful feedback for a specific code defect. The dashboard request instead lacks product requirements before any implementation exists. Clarify user groups, available data and success criteria first rather than treating the ambiguity as a failed code iteration.

D:

Self-generated happy-path fixtures can repeat the same false assumptions as the parser. Although useful elsewhere, it is not the direct mechanism to resolve important missing requirements before writing code.

Question 358

An agent refactors a formatter and gets a green focused test, then declares the package safe. What verification should follow?

  1. Address independent issues in bounded batches with targeted checks, then run an integrated suite
  2. Test externally specified missing-field and malformed-input cases that were not derived from the implementation
  3. Run relevant regression and integration checks across affected consumers
  4. A concise execution ledger recording completed edits, test outcomes and unresolved work

Explanation

Correct Answer

C:

A passing focused test verifies one behavior, not every consumer of a shared formatter. Identify the affected public interfaces and callers, run regression and integration checks for those consumers, and inspect the change diff for unintended effects. Broader verification is particularly important for reusable utilities because changed formatting can alter unrelated outputs even when the original bug's local test is green.

Incorrect Answers

A:

Grouped fixes can improve efficiency when independent, but integration must still be validated. The proposed option cannot provide the specific “Run relevant regression and integration checks across affected consumers” behavior that the case requires. Broader verification is particularly important for reusable utilities because changed formatting can alter unrelated outputs even when the original bug's local test is green.

B:

Self-generated happy-path fixtures can repeat the same false assumptions as the parser. The scenario instead requires a way to verify downstream behavior after shared-component changes.

D:

Progress evidence makes restarts and final audits reliable. That addresses a different part of the system, not the requirement to verify downstream behavior after shared-component changes.

Question 359

A coding assistant changes 700 lines while fixing a single function. What editorial technique helps?

  1. Reduce the failing path to a reproducible minimal test and capture environmental variables
  2. Inspect the diff and reduce changes to the smallest coherent fix
  3. Test externally specified missing-field and malformed-input cases that were not derived from the implementation
  4. Fix and verify the shared helper first before patching dependent callers

Explanation

Correct Answer

B:

Smaller diffs are easier to review and validate. Unexpected modifications should be challenged even if tests still pass. Review the diff against the requested function change and revert unrelated modifications. A smaller coherent patch reduces review burden and makes test failures easier to attribute.

Incorrect Answers

A:

A deterministic reproduction allows targeted diagnosis. This capability does not directly avoid scope creep during iterative coding. A minimal failing test can isolate a defect, but it will not undo 700 unintended changed lines. The immediate need is to inspect and narrow the diff to the requested function.

C:

Additional malformed-input tests may reveal future edge cases, but the immediate problem is a 700-line diff for one small function. Review the changes and eliminate unrelated modifications first, then run the focused tests for the narrow fix.

D:

A shared-helper-first strategy applies when multiple failures share one root cause. Here the agent changed far more code than a single-function repair requires. Trim the diff to the smallest coherent edit and validate it before attempting broad helper refactoring.

Question 360

The agent repeatedly fails the same build but its prompt does not include the latest compiler output. What should be added?

  1. Ask focused design questions to resolve consequential ambiguities before generating implementation
  2. Return the exact relevant compiler error to the next correction iteration
  3. Provide representative input/output examples and explicit testable invariants
  4. A concise execution ledger recording completed edits, test outcomes and unresolved work

Explanation

Correct Answer

B:

Include the exact relevant compiler diagnostic and the current code context in the next bounded correction attempt. The failure text identifies a concrete unmet requirement—such as a missing symbol, type mismatch or invalid build option—that the agent can test after editing. Repeating a vague “fix the build” prompt without new diagnostic evidence encourages the same speculative changes and can conceal whether the actual error has moved.

Incorrect Answers

A:

A few targeted questions can prevent wasted coding on the wrong requirements. The scenario instead requires a way to feed observable tool errors into refinement.

C:

Concrete examples communicate expected shape and edge cases more directly than vague style instructions. Although useful elsewhere, it is not the direct mechanism to feed observable tool errors into refinement.

D:

Progress evidence makes restarts and final audits reliable. This alternative does not establish how to feed observable tool errors into refinement in the stated workflow.

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