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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 15

Question 140

A web-research subagent collecting citations can also invoke a local delete_file tool. A malformed document excerpt once led it to delete a temporary report file. Which role design change most directly prevents recurrence?

  1. Increase the maximum number of tool calls so the researcher can inspect more documents.
  2. Retain delete_file but require the researcher to include a rationale in its final prose.
  3. Restrict allowed tools to approved search and read operations, excluding deletion.
  4. Replace the citation source parser with a faster one while retaining the same tool permissions.

Explanation

Correct Answer

C:

A citation specialist should retrieve sources and inspect their content; filesystem deletion is outside that responsibility. Configuring a read-only allowedTools set makes the destructive action unavailable to that subagent rather than depending on the model to ignore a malicious excerpt. Backend filesystem permissions should reinforce this boundary. The coordinator can reserve cleanup work for a separate, explicitly authorized workflow with appropriate approvals and auditability. This maps the capability surface to the task's actual needs.

Incorrect Answers

A:

Additional tool opportunities do not limit the risk of deleting files. The root cause is a mutation capability unrelated to a citation retrieval role. The agent should have an intentionally smaller tool set and follow backend permission checks. More requests could create additional opportunities for misuse.

B:

A final explanation arrives after an unsafe action and cannot restore deleted data. Prose logging may help audit but does not enforce a boundary. Removing unnecessary mutation access is the more direct preventive measure. Side-effecting operations need enforceable permission and approval gates.

D:

Parser speed does not affect whether the subagent can execute an unwanted delete operation. Even correctly parsed data can contain untrusted instructions that attempt to redirect behavior. The tool boundary and authorization policy need to change. Authorization failure is independent of parser performance.

Question 141

A customer-support model must sometimes answer questions such as 'What is your published opening time?' directly, and other times use MCP tools to fetch live order status. A developer sets tool_choice to require a tool for every message. What should be changed?

  1. Use tool_choice any for all messages, because any means the model may answer without a tool.
  2. Use tool_choice auto so Claude can produce a direct reply or choose a relevant tool.
  3. Name the live-order tool as the forced choice for all customer messages.
  4. Remove all tool definitions so that text-only answers become possible.

Explanation

Correct Answer

B:

With auto, the model can return text for a request that needs no external operation while still invoking an MCP tool for fresh account or order information. That choice matches the mixed workload in the scenario. Requiring tool calls on every turn creates artificial searches and may prevent the agent from concluding after receiving sufficient evidence. The application should still enforce authorization and verification on tools that actually access or mutate customer data; auto is a selection policy, not permission control.

Incorrect Answers

A:

The 'any' setting is intended to require a tool call from the available set, not to preserve a text-only route. Using it for simple published-policy questions keeps the unnecessary invocation requirement. The tool policy should allow the model to respond without invoking a tool when external data is not needed.

C:

Forcing an order lookup may make sense for a required order-status step, but it misroutes basic public-policy questions and unrelated support queries. The agent cannot use its ordinary text route when it is required to call a named tool. The correct configuration should match request needs.

D:

Without the tools, the assistant cannot retrieve live order information when that is explicitly required. This trades one misconfiguration for an incomplete support system. Auto selection allows both paths while retaining the necessary tool catalog and security checks. This would make live account queries impossible to complete.

Question 142

A document-ingestion service requires a language detector's structured metadata before it can select any of three parsers. Claude sometimes skips detection and attempts extraction immediately. The application can choose an API tool_choice on the initial step. What is the most precise solution?

  1. Force the named detect_document_language tool on the initial model call.
  2. Use auto tool selection and trust an instruction that the detector is mandatory.
  3. Force any tool for every turn, including final user-facing explanations.
  4. Remove parser tools and let the model infer the language from filename extensions.

Explanation

Correct Answer

A:

The first step is deterministic: every document requires language metadata before parser selection. A named tool_choice can require the model to call that particular detector rather than selecting a parser prematurely. After the language result is handled, the application should permit an appropriate subsequent parser selection and final response instead of forcing detection forever. The detector still needs a valid schema and error handling for unsupported languages or unreadable content; forcing a call alone does not guarantee successful classification.

Incorrect Answers

B:

Auto permits a text answer or a different tool call, which is precisely the observed failure. An instruction can improve preference but does not enforce this deterministic prerequisite. A named initial tool choice or application-level orchestration is more reliable for a required step.

C:

Any requires use of a tool but does not specify which one. Claude could select a parser before language detection or continue making calls even after extraction finishes. The required first step needs the named detector, followed by a less restrictive policy.

D:

File extensions indicate format, not necessarily written language. Removing extraction capabilities would also make the processing workflow unusable. A structured language detection operation with a controlled first invocation better matches the actual dependency. Filenames are not a trustworthy language-classification signal.

Question 143

A forms-processing agent must call one of several extraction tools depending on whether the input is a receipt, contract, or ID card. A tool call is mandatory before any answer, but the input type varies. Which tool_choice setting matches that constraint?

  1. auto, because it always invokes a tool when a tool is advertised.
  2. A named receipt extractor for all documents.
  3. any, with the allowed tools restricted to the legitimate extractors.
  4. Disable tool use and request JSON directly in natural language.

Explanation

Correct Answer

C:

Tool_choice any requires at least one tool from the available set, while allowing the model to select the extractor that fits the document. This is different from auto, which may return text without invoking anything, and from forcing one named tool, which cannot handle different document types. Keeping the allowed catalog limited to approved extraction tools also prevents an unrelated action from satisfying the at-least-one requirement. The application must validate the returned schema before downstream use.

Incorrect Answers

A:

Auto allows the model to answer in prose without a tool. That is appropriate for some workloads, but it does not guarantee the extraction step required here. The application needs a setting that mandates a call while preserving selection across available extractors.

B:

A fixed receipt extractor would mis-handle contracts and ID cards. The choice should be constrained to a tool invocation without predetermining an incompatible extractor. The model or a reliable classifier must choose the suitable tool from the allowed group. The requirement calls for selection across different tool names.

D:

A prose request for JSON neither executes an extractor nor guarantees a correctly typed record. It would violate the explicit requirement that a tool perform extraction. A tool invocation should be enforced and the output should be validated independently. The workflow depends on the extractor actually running.

Question 144

A cited-report synthesizer receives curated search results from a coordinator. Its only remaining task is to check whether a specific paragraph supports one claim, yet its tool catalog includes unrestricted web_search, corpus_search, and browser automation. It repeatedly restarts broad research. What should change?

  1. Raise the maximum token count so the synthesizer can conduct all searches.
  2. Allow web_search but add an instruction that browsing is discouraged.
  3. Give the synthesizer a scoped verify_claim_against_source capability and remove broad discovery tools.
  4. Skip evidence verification and mark each supplied paragraph as confirmed.

Explanation

Correct Answer

C:

The specialist should compare a concrete claim with a supplied document or excerpt and report support, contradiction, or unresolved evidence. A narrow verification tool makes that responsibility explicit and prevents another full research cycle. The coordinator can still own open-ended search and source collection, maintaining a clear boundary between discovery and synthesis. Scoped tools also reduce irrelevant context and make citations easier to audit because the verification record identifies the particular source used.

Incorrect Answers

A:

More tokens permit more irrelevant searches without correcting the role's boundaries. The coordinator already performed broad discovery. The remaining problem is targeted fact verification and should use the specific evidence provided, with a bounded tool contract. No new discovery is authorized by the specific verification task.

B:

This leaves the broad capability visible and relies only on model compliance, even though the observed behavior is repeated browsing. Least-privilege tools and explicit verification inputs are stronger controls. The coordinator can retain the broad search permission separately. A limited list better matches the specialist role.

D:

Receiving curated evidence does not guarantee that every drafted claim follows from it. The specialist must still check the citation against the claim. Automatically confirming all paragraphs would hide unsupported inferences, whereas narrow verification preserves review quality. Draft claims can diverge from the underlying evidence.

Question 145

A code-review subagent receives a generic fetch_url tool capable of requesting localhost services and internal cloud metadata addresses. It only needs release notes from two approved documentation domains. Which redesign is the strongest way to reduce SSRF exposure?

  1. Tell the model in its system prompt to avoid internal IP addresses, leaving the fetch tool unrestricted.
  2. Replace the fetch interface with an approved-documents loader that validates allowed origins and blocks internal network targets.
  3. Add a random suffix to fetched URLs so they cannot point to known internal services.
  4. Permit any URL as long as the resulting page contains the phrase 'release notes'.

Explanation

Correct Answer

B:

The role's actual requirement is access to a small set of trusted external documentation sources, not arbitrary network retrieval. A dedicated loader can enforce scheme, host allowlist, redirect revalidation, and IP-level protections before any request is made. This closes the server-side request-forgery path even if a prompt or source attempts to redirect the model. Network egress rules and least-privilege credentials should reinforce the validation; a descriptive tool name alone is insufficient.

Incorrect Answers

A:

A prompt does not enforce network destinations against malicious or malformed links. An untrusted document could still persuade the model to call an internal URL. Server-side allowlisting and safe URL validation are needed because the attack surface is the fetch capability itself.

C:

Changing the URL string does not reliably prevent access to internal hosts, especially when redirect or DNS behavior is involved. It may break legitimate documents while leaving other SSRF paths intact. Enforced destination validation is required before network access. DNS resolution and redirects also defeat such ad hoc tricks.

D:

Content checks happen after the network request and cannot undo access to a sensitive internal endpoint. Attackers can also place that phrase on malicious pages. The server must restrict destinations before fetching, rather than depending on fetched text as authorization.

Question 146

A multi-agent research system exposes eighteen tools to every agent. The source-retriever frequently chooses local file search when it should use journal search; the report editor sometimes invokes data-mutation tools. Which TWO steps address the tool design flaw? (SELECT TWO)

  1. Give every specialist all available tools so they have maximum flexibility.
  2. Define role-specific allowedTools so each specialist sees only capabilities needed for its work.
  3. Remove irrelevant and dangerous tools from the agent definitions and verify the effective tool catalog.
  4. Increase sampling randomness until wrong tool selection averages out.
  5. Ask the final editor to delete irrelevant tool names from the final report.

Explanation

Correct Answers

B:

A retrieval specialist might need journal search and document read, while an editor needs evidence access and writing facilities without data mutations. Splitting tools by role reduces selection ambiguity and limits the consequences of incorrect instructions. This is more enforceable than a shared prompt asking agents not to use irrelevant actions. Backend authorization should remain in place for any tool with side effects, since the model's allowed list is not a substitute for access control.

C:

The practical fix is to trim the actual exposed operations, not merely to document preferred usage. Verify that the search agent no longer sees mutation calls and that the editing role cannot invoke unrelated financial or system tools. Effective configurations can differ because of inherited settings or MCP servers, so a discovery test is necessary. The narrower catalog should still retain the tools needed to complete each role's approved responsibilities.

Incorrect Answers

A:

The observed failures come from an excessively broad catalog. More flexibility makes role boundaries harder to enforce and can increase harmful tool selection. Tools should be assigned to the operations actually necessary for each specialist's task. The problem requires restricting capabilities rather than expanding them.

D:

Random routing does not establish that journal search is chosen for scholarly sources or that destructive tools stay unused. It may make misrouting less predictable. The capability set should change deterministically and be tested against realistic requests. Reproducible role assignments allow more meaningful testing.

E:

Removing names from the final prose does not prevent earlier tool invocation. A dangerous operation may already have executed before report drafting. Authorization and least-privilege tool assignment must operate before the call, not after output formatting. Tool boundaries must be checked before execution.

Question 147

A research system has one coordinator for broad source discovery and one synthesis subagent for the final report. The synthesizer occasionally needs to check whether one already-collected source supports a claim; it should not run new topic-wide searches. Which tool split is best?

  1. Give both agents identical unrestricted web search and let them divide work spontaneously.
  2. Remove all tools from the synthesizer and require it to assert every citation from memory.
  3. Provide a scoped verify_fact operation to the synthesizer while keeping open-ended search with the coordinator.
  4. Permit a broad internet-search tool but stop every search after the first result.

Explanation

Correct Answer

C:

The verification operation can accept a claim, source reference, and relevant evidence passage, returning a reasoned support status. That meets the synthesizer's narrow need without launching another discovery pipeline. The coordinator remains responsible for exploring new topics and adding sources when a verification gap genuinely requires research. This separation reduces duplicate requests, preserves cited provenance, and makes it clear when an assertion is unresolved rather than implicitly endorsed by a broad search result.

Incorrect Answers

A:

Duplicating the full catalog makes the boundary between research and synthesis ambiguous. It also creates redundant retrieval and conflicting versions of source material. The coordinator should own broad search while the synthesis agent receives a narrow evidence-check route. Separation of duties makes source attribution easier to audit.

B:

The synthesizer may need to inspect or verify an existing source, and working from memory cannot guarantee passage-level attribution. Eliminating all verification access increases the risk of citation drift. A constrained checker is preferable to either universal access or no access.

D:

Limiting result count does not narrow the question the tool is permitted to ask. The agent could still query unrelated sources or accept an unsuitable first hit. A purpose-bound verification interface is more dependable than a result-count heuristic. A bounded checker also supports consistent evidence records.

Question 148

An account-management analyst's Claude subagent is configured with an update_account tool. An untrusted email asks it to change a customer's address, and the model attempts the call. Which TWO server-side checks must still guard the action? (SELECT TWO)

  1. Verify the caller's authenticated identity and entitlement to modify that specific account.
  2. Treat any tool call generated by Claude as proof that the human user approved it.
  3. Check action-specific user consent or other required approval before committing the modification.
  4. Skip backend checks because the subagent has an allowedTools list.
  5. Accept the change when the email subject contains the word 'urgent'.

Explanation

Correct Answers

A:

The model's ability to name a tool proves nothing about business authorization. The backend must bind the request to an authenticated principal, check account-level permissions, and reject actions outside the granted scope. This prevents a broad model tool catalog or injected text from becoming an access-control bypass. Authorization should be evaluated for the current operation rather than inherited from a vague statement that the analyst is 'trusted'. Audit records should identify the authorizing principal.

C:

Updating an address may require a confirmed instruction from the account owner or a documented approval process. The backend should verify that this particular change is authorized, not infer consent from an unrelated message or a previous login. This second gate complements identity and entitlement checks and prevents prompt-injection content from directly triggering a sensitive mutation. Record the approval context so the decision can be audited if the customer disputes the change.

Incorrect Answers

B:

Language models can be influenced by untrusted content and can produce calls without the relevant user's informed consent. Tool availability is not an approval channel. Sensitive account mutations require independent authorization and action-specific confirmation as appropriate. The backend must reject unapproved modifications.

D:

An allowedTools list controls what the model can attempt, not whether a given customer account may legally or operationally be changed. A caller with a visible update tool could still lack permissions for this record. Server-side authorization remains mandatory. The actual customer entitlement remains a separate concern.

E:

Urgency is not an authentication or consent factor. Attackers can easily set message headers and request time-sensitive action. The update must depend on verified identity, entitlement, and required approval rather than prose characteristics. Header text is also an untrusted input surface.

Question 149

A security team created a vulnerability-assessment subagent to inventory outdated components. Its tool catalog also includes patch_server, which can restart production machines. The analyst's task is only to report findings. How should the roles be configured?

  1. Grant assessment and patch operations to the same subagent to avoid coordination overhead.
  2. Split read-only assessment tools from a separately authorized remediation agent with explicit approvals.
  3. Keep patch_server enabled but instruct the assessment agent to ask before patching.
  4. Disable vulnerability scanning and allow only patching, because patches eventually eliminate findings.

Explanation

Correct Answer

B:

The evidence collector should inspect versions and record vulnerabilities without having the ability to modify servers. Remediation can be delegated to another role with narrowly scoped patch permissions, maintenance-window checks, rollback procedures, and an approved change record. This separation preserves independent assessment and reduces the chance that an untrusted scan output triggers an unapproved production restart. Backend authorization must reinforce both roles; naming them 'audit' and 'remediate' without changing permissions would not enforce the distinction.

Incorrect Answers

A:

Combining read-only assessment with production mutation creates unnecessary blast radius. The assessment agent can be induced to patch systems despite being asked only to report. The safer design separates evidence collection from remediation authority and its approval process. Reviews should not implicitly grant write authority.

C:

An instruction to ask is helpful but not equivalent to removing mutation access for a read-only task. The tool remains callable and could execute in response to confusing or malicious content. Least privilege should be configured directly and enforced by the backend.

D:

Patching does not replace evidence collection or risk assessment. Unverified patches can introduce outages or violate change-management rules. The requested task is to identify vulnerabilities; remediation must be a distinct authorized workflow. A vulnerability report may be required before any change proposal.

Question 150

A developer forces Claude to call the same metadata tool on every turn of a pipeline, including after metadata has been collected and the assistant could return its finished report. The workflow loops needlessly. What is the correct change?

  1. Force the metadata tool only for the required initial step, then allow later tool choice or completion.
  2. Keep forcing metadata calls indefinitely because the model may eventually produce a final answer.
  3. Delete the metadata tool and infer fields from the model's memory.
  4. Force any tool forever so at least the model can choose a different operation.

Explanation

Correct Answer

A:

The pipeline has one true deterministic dependency: collecting metadata before subsequent processing. A named tool call can enforce that initial step, but keeping the same choice fixed after its result blocks normal progression and final output. The host application should change the tool policy according to workflow state, allowing the model to select appropriate later tools or return an end-turn response. Tool choice is a per-step orchestration decision, not a universal rule for every conversation turn.

Incorrect Answers

B:

An always-forced tool can prevent a text-only completion and repeatedly perform completed work. Repetition does not resolve the workflow dependency. The host should update tool-choice constraints when the prerequisite is satisfied. Correct state transitions need the host to revise constraints.

C:

Removing a required, authoritative extraction step undermines the pipeline's data contract. The problem is not the existence of the metadata tool but its use after completion. Enforce the initial requirement only and validate its output. Metadata should be verified before later decisions.

D:

The any setting still requires a tool invocation and does not permit straightforward final text when no further operation is needed. It may replace one unnecessary call with another. Flexible selection or completion should resume after the deterministic step. The model needs a legal path to finish.

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