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134 Questions & Answers

Last Update: Oct 06, 2026

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Anthropic CCA-F Practice Test 3

Question 20

A support automation reads a customer's cancellation request and immediately emits tool_use for close_account. The tool supports a dry-run preview. What is a safe host sequence?

  1. Treat the dry-run as proof the account is already closed
  2. Run an authorized preview, confirm consequences where required, then execute with scoped permissions
  3. Execute twice to improve certainty of closure
  4. Suppress user confirmation even when policy requires it

Explanation

Correct Answer

B:

Use the preview as a separate, non-mutating checkpoint: verify the authenticated account, inspect the possible effects, and obtain any confirmation required by account policy. After approval, execute one scoped close_account operation under current permissions and retain its real result. A final readback can reconcile ambiguous provider replies before announcing closure. This sequence respects the customer's request while avoiding a speculative or duplicated irreversible action. It also distinguishes planning and approval from actual completed account changes.

Incorrect Answers

A:

A dry run can predict consequences or validate an account-closure request without mutating the provider's account state. Treating its output as evidence that the account is already closed would leave the customer misinformed and skip the actual authorized operation. The host should distinguish preview receipt from execution receipt, present any material retention or billing consequences, and report completion only after the real closure endpoint confirms the target state. A preview is diagnostic, not a completed cancellation.

C:

Executing close_account twice does not make the first closure more certain. A second request may produce an error, affect an already-changed account, or create duplicate cleanup actions if the API is not safely idempotent. When the initial outcome is uncertain, correlate the original operation and read back provider state rather than repeating blindly. The preview is available precisely to examine consequences before making an approved mutation; it does not justify redundant execution.

D:

A cancellation may have data-retention, billing, or service-disruption consequences that account policy requires the customer to confirm. Suppressing that required step crosses an authorization boundary even if the model understood the request. The host should present the preview and obtain the necessary decision, then use scoped credentials for the action. Missing confirmation means the closure stays pending; neither assistant urgency nor tool availability can silently waive the stated requirement.

Question 21

A streaming client receives partial text followed by a tool-use request in the same assistant message. How should it decide whether to finish?

  1. Stop as soon as any text token appears
  2. Dispatch a tool call as soon as a partial streamed tool name becomes visible
  3. Treat every streamed response as final regardless of stop condition
  4. Wait for the completed message and inspect its stop reason and content blocks

Explanation

Correct Answer

D:

The host should accumulate the streaming events into a complete assistant message before deciding whether the turn is done. It must inspect the final stop_reason and any fully parsed tool_use blocks; partial tool names or JSON fragments are not executable calls. If the response requests tools, validate their arguments and permissions, dispatch them and return correlated results. If the response ends normally, return its answer; if truncated, mark it incomplete or continue appropriately. This respects streaming as a transport mechanism without confusing partial content with a finished decision.

Incorrect Answers

A:

Streaming text may arrive before Claude emits a tool_use block or an explicit stop reason, so the first visible prose token cannot prove that the assistant has completed its turn. Stopping at that point would discard pending tool arguments and prevent the host from fulfilling legitimate operations. Assemble the complete streamed message, inspect its content blocks and completion state, and decide based on actual protocol metadata. A text prefix is not a final-response signal.

B:

A streamed prefix is not yet a validated tool invocation. Later chunks may change the name, complete required arguments or reveal a different stop reason. Executing prematurely risks malformed calls, wrong privileges or duplicate side effects when the completed message arrives. The host should assemble the full tool-use block, validate its schema and authorization, and then dispatch the call only after message-level semantics indicate an actual tool request.

C:

Not every streamed message ends with a usable final answer. Some outputs terminate because a tool is requested, others because generation reached max_tokens or was interrupted. Treating every stream as final ignores those distinct states and can cause incomplete answers or unexecuted operations to be reported as complete. Wait for the finalized message and its stop_reason, then either return the answer, handle a tool-use continuation, or apply a bounded incomplete-output policy.

Question 22

A ticket agent calls a tool that returns success=true but no updated ticket identifier. Which follow-up best establishes the new state?

  1. Perform a bounded read-back against the authoritative ticket system
  2. Assume no record was changed because the ID is absent
  3. Use the next expected sequence number in the client’s local ticket cache as the updated ID
  4. Call the same write ten more times

Explanation

Correct Answer

A:

The success flag says the provider accepted or completed some operation, but it does not identify which ticket was updated. A bounded authoritative read-back, using the original request's case identifier or operation correlation token, is the defensible way to establish the new record state. The host should verify that the target ticket has the intended change before reporting a confirmed update. If the provider cannot correlate it, state that the outcome remains uncertain rather than guessing an identifier or resubmitting a potentially duplicate write. This checks the actual ticket system rather than treating a partial receipt as sufficient proof.

Incorrect Answers

B:

The absence of a ticket identifier in the reply is a missing field, not evidence that the write failed. The service might have committed the change while returning an incomplete response. Assuming failure and telling the customer nothing changed would conflict with a later authoritative record; retrying based on that assumption could create extra events. Reconcile by querying the known target or operation ID, and report unknown status if the application lacks a safe lookup. Response completeness and mutation success are separate conditions.

C:

Local sequence predictions can be invalid when other users create tickets concurrently or the provider allocates nonsequential identifiers. A success flag without an ID does not prove which target record was affected. The client should correlate its original operation and query authoritative provider state or audit events for the actual update. Announcing a guessed identifier could misroute subsequent actions or expose another customer’s record and would not satisfy the read-back requirement.

D:

Repeating the same ticket write ten times cannot identify which update the original success flag refers to. If the provider already committed the mutation, later attempts might create duplicate tickets, notifications or audit events, especially if idempotency is not supported. The host should preserve the initial request identifier and query the system of record for the actual ticket state. A retry should be bounded, permission-checked and provider-safe; a fixed large count is not a substitute for outcome reconciliation.

Question 23

An agent asks to send a bulk email while its tool-call arguments include addresses derived from scraped web text. What validation is most important?

  1. Trust the scraped addresses because they appear in tool results
  2. Send only to addresses passing an email-format check, without confirming approved recipients
  3. Disable outgoing-email logs to reduce context
  4. Require explicit approved recipients and validate the destination list against authorization

Explanation

Correct Answer

D:

The executor should treat web-scraped addresses as untrusted candidates, not the sender's authorized destination list. Validate each proposed recipient against the user-approved mailing scope, the authenticated sending identity and any data-disclosure restrictions before invoking the send tool. Where a destination was introduced only by scraped content, require separate approval or omit it. Preserve the true provider result for any permitted send so a queued email is not misreported as delivered. This checks both what may leave the system and who may receive it, rather than relying on address syntax or plausible page content.

Incorrect Answers

A:

A scraped page can list real email addresses and still have no authority to designate who should receive this user's message. The tool output is lower-trust data; an attacker could add addresses or change an apparent distribution list without consent. Before sending, the host must compare proposed destinations with an explicitly approved recipient set and the disclosure policy for the message content. Merely having appeared in a search result is neither authenticated ownership of an inbox nor permission to disclose information to it.

B:

A syntactically valid address can still belong to an unauthorized recipient. The list originated in scraped page text, so even a valid destination may be a prompt-injection target or unrelated contact. Before any consequential send, the host needs an approved recipient set, appropriate scope and data-disclosure permission, not merely a regex filter. Address syntax is useful secondary validation but cannot substitute for explicit authorization of the actual destinations.

C:

Turning off email-send logs might shorten diagnostic output, but it leaves the actual recipient list unchecked and removes the trail needed to investigate an unauthorized send. The risk originates from scraped addresses being promoted into a privileged outbound operation. Keep a protected, redacted record of the send decision and validate the recipient identities against the user's approved scope before dispatch. Reducing log size and proving recipient authorization are different controls; the former cannot substitute for the latter.

Question 24

A model suggests a filesystem tool call with a path outside the authorized project directory. Which defense belongs in the host?

  1. Canonicalize the path and enforce the allowed directory boundary before access
  2. Permit the write if the path looks familiar
  3. Execute the call and remove the log afterward
  4. Check only whether the raw string begins with the project folder name

Explanation

Correct Answer

A:

The host must examine the resolved filesystem target rather than trusting a model-provided path string. Normalize relative components, evaluate symbolic links using safe filesystem operations, and enforce the actual read or write authorization for the canonical resource before opening it. For a path that resolves outside the project, deny access and return a scoped error. This remains necessary even if Claude was given a clear directory rule, because file paths are untrusted tool arguments and alternative path spellings can refer to the same protected location.

Incorrect Answers

B:

A familiar-looking filename can still refer to an unauthorized object. For example, a symlink named project/config may resolve outside the permitted root, or a relative path may traverse upward. Human recognition of the string does not validate the canonical destination or the requested operation. Authorize against the actual resolved resource and principal, not how plausible the submitted name appears.

C:

Executing the out-of-scope write first crosses the permission boundary even if the audit log is later removed. Deleting the log compounds the failure by hiding which file changed and why. The proper defense blocks access before the operating system opens the target and records a safe denial event. Logging is important for accountability, but cannot substitute for preventing the unauthorized side effect.

D:

Raw string-prefix checks can be fooled by sibling names such as /workspace/project-old, by ../ segments, or by symbolic links under an allowed directory. The bytes of the submitted path are not a trustworthy representation of the final filesystem object. Resolve the effective path under a properly enforced sandbox and compare it to the authorized root using path-aware containment rather than a textual starts-with test.

Question 25

A due-diligence workflow needs legal, security and financial assessments of the same acquisition; none depends on the others' intermediate output. How should an agent architect coordinate the specialists?

  1. Allow each specialist to send an unreviewed final answer to the user
  2. Pass a single shared mutable scratchpad to all agents without ownership
  3. Delegate bounded parallel reviews and synthesize their evidence in one coordinator
  4. Ask the legal specialist to author the financial audit as well

Explanation

Correct Answer

C:

The legal, security and financial assessments have no dependency on each other's intermediate results, so bounded parallel delegation is justified. Assign each specialist a distinct scope, source requirements, access limits, and response contract; the coordinator should validate each result before combining it. It can then expose conflicting assumptions, reconcile material disagreements, and provide one evidence-linked acquisition assessment. This preserves the speed of independent work without treating unfinished or unverified specialist reports as authorization to issue a final recommendation.

Incorrect Answers

A:

Allowing independent specialists to publish their own unreviewed final answers would produce disconnected legal, security and financial conclusions without a common assessment of the acquisition. One specialist might assume a different deal structure or evidence date than another. The coordinator needs to collect their bounded findings, record any conflicts, and reconcile caveats before issuing a consolidated user-facing conclusion. Parallel investigation improves efficiency but does not transfer final decision ownership to each worker.

B:

An unowned shared mutable scratchpad can let one agent overwrite another's evidence or attach conclusions to the wrong specialty. Legal confidentiality and financial calculations may also have different access scopes. Give each specialist its own task ID and evidence record, then merge under controlled provenance with a coordinator responsible for reconciliation. Shared references can be useful when scoped and versioned; uncontrolled concurrent mutation is not a reliable way to combine independent reviews.

D:

Asking the legal specialist to perform the financial audit conflates different competencies and gives one worker an assignment outside the intended independent coverage. It can obscure calculation provenance and increase the chance of a polished but unsupported conclusion. The workflow already has separately defined legal, financial and security concerns. Assign those to bounded specialists and let a coordinator compare their findings rather than asking one agent to replace a separate expert review.

Question 26

A code migration coordinator assigns one subagent to examine tests and another to change API contracts, but both edit the same file. What design change reduces conflicting writes?

  1. Ask both agents to edit and accept whichever saves last
  2. Disable all tests until both have finished
  3. Merge responses based solely on completion time
  4. Give one agent file ownership and let the other return review findings without editing it

Explanation

Correct Answer

D:

One worker should own changes to the API contract file; the test specialist can independently inspect the proposed revision and return findings without mutating that file. The coordinator then hands those observations to the owner, who incorporates justified corrections on a controlled branch. This avoids two uncoordinated writers, preserves a clear audit trail of each change and allows relevant tests to run against the actual integrated revision. Parallel analysis remains useful, but shared mutation requires ownership or an explicitly verified merge procedure.

Incorrect Answers

A:

A last-writer-wins approach permits the API-contract worker to overwrite an edit made by the test reviewer, or vice versa, without resolving their different assumptions. The final file may be syntactically valid but missing one worker's legitimate changes. Assign a single mutation owner for the shared file or use an explicit branch and conflict-resolution protocol. Completion time is not a substitute for reviewing the combined diff.

B:

Disabling tests removes the very evidence the review specialist was meant to provide. It neither prevents two workers from writing the same file nor establishes that the merged contract works. Keep the testing role read-only against a specified revision, let the authorized editor apply changes, and run relevant tests again on the integrated result. A conflict in file ownership is resolved by controlling writes, not by suppressing validation.

C:

Merge order based solely on which worker finishes first is arbitrary. A test reviewer could finish quickly using an old contract while the editor is still changing the same fields. The coordinator needs the base revision, changed paths, integration conflicts and acceptance tests before choosing what to merge. Treat each output as evidence tied to a commit, not as an authoritative overwrite command ordered by wall-clock time.

Question 27

A research coordinator sends three specialist agents to evaluate privacy, scalability and cost. Their outputs have inconsistent JSON fields, breaking synthesis. What should the coordinator change?

  1. Require a common structured findings schema with confidence and evidence fields
  2. Delete the inconsistent responses and claim the research passed
  3. Let each agent choose arbitrary headings
  4. Infer missing numerical costs from the privacy report

Explanation

Correct Answer

A:

A common result schema allows privacy, scalability and cost reviewers to communicate through one reliable synthesis contract. Each specialist should return its own findings with typed values, evidence pointers, uncertainty, and missing fields rather than incompatible ad-hoc JSON keys. The coordinator validates the schema before comparing cross-domain outcomes and can distinguish an unknown cost from a genuine value of zero. Schema alignment does not make every conclusion true; it makes gaps visible and results structurally comparable while retaining independent source review for the actual claims.

Incorrect Answers

B:

Deleting incompatible reports and announcing success would erase the privacy or scalability evidence already gathered. Structural failure means the coordinator cannot safely consume the output as requested; it does not mean the domain has passed review. Keep the original reports for diagnosis and request an appropriately typed resubmission or an explicit inability-to-complete status. Never turn an invalid handoff into a favorable technical finding.

C:

Arbitrary headings may be readable to people, but they are a brittle interface for automated synthesis. One specialist may call a field risk and another severity, while one omits units or source references entirely. This prevents reliable validation of required evidence across agents. Define a common interchange structure and allow specialization inside agreed subfields, rather than asking the coordinator to guess how each free-form result maps to the contract.

D:

The privacy report has different evidence and expertise from the cost specialist; it cannot establish a missing numerical estimate merely because the JSON consumer needs a field. Inventing that cost would turn schema repair into unsupported financial advice. Leave the cost explicitly unknown, request actual supporting estimates and compare only measurements with proper units and sources. A shared schema must represent missing information rather than force fictional completeness.

Question 28

Two delegated agents disagree whether an encryption setting is enabled in production. What should the coordinator do before issuing a definitive report?

  1. Resolve the conflict with authoritative configuration evidence and record both claims
  2. Pick the fastest agent's conclusion
  3. Suppress the discrepancy to keep the report concise
  4. Count responses and choose whichever answer gets a majority

Explanation

Correct Answer

A:

Two agents may have read different deployments, timestamps or configuration layers, so their disagreement is not resolved by choosing the more confident response. Verify the current encryption state in an authoritative production setting or deployment artifact, record the exact environment and observation time, and retain both original claims for audit. If the authoritative read is unavailable, report uncertainty and block any decision that depends on verified encryption. Reconciliation means examining actual evidence, not averaging expert opinions or hiding the conflicting result.

Incorrect Answers

B:

The fastest worker might have relied on an old cache or a staging environment, while the slower one retrieved the current production policy. Response latency does not measure correctness, freshness or environment scope. Choosing by speed can establish a false security conclusion with no evidence of where the setting was read. Compare the workers' source identities and obtain an authoritative production read before issuing a definitive compliance report.

C:

Suppressing the discrepancy makes the report appear decisive while concealing that the production encryption state is unresolved. A reviewer would then be unable to investigate which observation was stale or whether a configuration drift occurred. Preserve both findings, mark their provenance and reconcile them through the controlling infrastructure record. A concise report may summarize the conflict, but cannot safely omit it when it affects a security assertion.

D:

A majority vote would still be unreliable if all voters relied on the same stale log or consulted a nonproduction environment. The question is what setting the deployment actually uses, not what most assistants believe. Ground that answer in a current system configuration or provider readback and state the limitations of access. Voting cannot transform correlated guesses into authoritative environmental evidence.

Question 29

A coordinator sends an open-ended instruction to six subagents; each independently researches the same vendor docs. What improvement reduces duplicated effort?

  1. Increase the number of subagents to twelve
  2. Allocate distinct deliverables and shared citations before delegation
  3. Have every specialist rewrite the same overview
  4. Remove citation requirements to shorten outputs

Explanation

Correct Answer

B:

Before delegation, define complementary deliverables such as authentication behavior, API limits and migration caveats, then assign each to a named worker with a bounded search scope. Share source identifiers and verified citations so specialists do not all repeat the same discovery process. The coordinator still reviews source applicability and synthesizes conflicts; sharing a URL does not prove a claim. Distinct ownership and evidence-bearing handoffs reduce redundant retrieval while preserving coverage and make it possible to identify exactly which portion of the vendor documentation remains unreviewed.

Incorrect Answers

A:

Doubling the number of identically instructed workers would probably increase duplicate documentation retrieval and amplify coordination overhead. Each additional agent may independently download the same vendor guide and repeat the same summary without contributing new tested decisions. First divide the required outputs into nonoverlapping scope, give each worker an evidence contract and decide which source material can be shared safely. Only add workers when the tasks are genuinely independent and the coordinator can reconcile their distinct findings.

C:

Having all six specialists rewrite the same overview produces six versions of one deliverable rather than coverage of six different questions. Textual variety may mask repeated evidence and consume budget, while the user still lacks answers on uncovered topics. The coordinator should allocate a unique technical inference to each subagent, document shared references and reserve synthesis for comparing complementary results rather than redundant prose.

D:

Removing citation requirements could shorten outputs but would not reduce repeated research at the source. It also makes it harder to identify that all agents relied on the same page or to audit a disputed technical assertion. Ask workers to return short source anchors with scoped findings and uncertainty. The bottleneck is undifferentiated assignments, not the modest cost of preserving provenance.

Question 30

A triage assistant needs one specialist for interpreting logs and another for recommending customer messages. Which ownership structure is safest?

  1. Allow the log agent to send unsupervised external messages
  2. A coordinator controls the decision, log specialist supplies evidence, communication specialist drafts wording
  3. Give both agents broad production write permissions
  4. Let the communication agent make incident severity from tone alone

Explanation

Correct Answer

B:

Keep evidence analysis, message drafting and final authorization as distinct responsibilities. A log specialist reports time-stamped observations and technical uncertainty; a communication specialist turns validated findings into understandable customer language. The coordinator verifies the facts, decides whether outreach is warranted, and uses an appropriately scoped channel for any actual send. This separation prevents tone from driving severity classification and prevents an evidence collector from independently creating external side effects. The final message should describe only confirmed changes and explicitly note unresolved issues.

Incorrect Answers

A:

The log specialist's authority is to inspect operational evidence and identify technical findings, not to send customer communications. If it contacts customers directly, an unverified observation could be described as a confirmed outage or disclose sensitive diagnostics. The coordinator should receive the technical finding, resolve any classification uncertainty, and route an approved message through the authorized communication process. Specialists can contribute content without inheriting external-send privileges.

C:

Giving both workers broad production write tools expands the blast radius of a mistaken prompt or malicious input. Neither interpreting logs nor drafting customer text inherently requires unrestricted mutation of live systems. Separate read-only diagnostic access from communication-drafting capabilities and require the coordinator to authorize any consequential operation. A worker's helpful role does not imply it can restart services, change accounts, or contact customers without a verified reason and scoped permission.

D:

Customer-friendly language is not evidence of incident severity. A communication worker might choose a reassuring tone even when logs show a critical failure, or exaggerate a minor issue because the text sounds alarming. Severity should derive from the diagnostic evidence and applicable impact criteria, then be communicated in accessible language. The coordinator must reconcile any conflict between technical findings and drafted wording before delivering the customer message.


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