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134 Questions & Answers

Last Update: Oct 06, 2026

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Anthropic CCA-F Practice Test 5

Question 40

A coordinator delegates data cleaning to a tool-enabled worker and asks a separate worker to review the result. What should the reviewer consume?

  1. The original dataset without any diff
  2. The actual transformed dataset, change log and validation outcomes
  3. Only the producer's statement that cleaning succeeded
  4. A small manually curated before-and-after sample chosen by the producing worker

Explanation

Correct Answer

B:

A separate reviewer should inspect the actual output of the cleaning operation, not merely the producing worker's narrative. The transformed dataset and a versioned change log allow row counts, field conversions, missing values and unexpected deletions to be checked against the original. Validation outcomes should identify the rules tested and any failures, with reproducible references to the exact input and output revisions. A representative sample may help investigate specific anomalies but must not replace full integrity checks where the acceptance contract requires them. This makes review an evidence-based examination of the completed transformation rather than accepting a worker's self-report.

Incorrect Answers

A:

The original dataset alone provides a baseline, but it does not tell the reviewer which rows the cleaning worker changed, deleted or newly created. Without a transformed output or diff, the reviewer cannot establish whether input normalization was applied consistently or caused data loss. It should request the actual resulting dataset, a reproducible change record and validation summaries tied to the original revision. Reviewing only the input cannot certify the mutation that the task was supposed to perform.

C:

The producer's claim that cleaning succeeded cannot reveal which source rows changed or whether any records were dropped. A model may sound confident even when its transformation script skipped a file or misconverted a field. The reviewer needs independent artifacts: actual cleaned data, counts or diffs, validation results and a stable link to the input revision. Success prose may help explain intent but cannot establish the transformed dataset's accuracy or completeness.

D:

A producer-selected sample may illustrate a transformation but cannot establish that the entire dataset was cleaned correctly. It could omit the very rows most vulnerable to an accidental deletion or incorrect conversion. The reviewer needs the actual transformed dataset or a reproducible diff, validation outcomes and traceability to the original inputs. A sample can complement that evidence, but should not replace systematic row-level and risk-sensitive checks.

Question 41

A specialist is allowed to read a support ticket but returns a customer password in the shared coordinator summary. What is the correct boundary action?

  1. Redact the secret and correct the specialist output contract before synthesis
  2. Include it in a hidden appendix
  3. Relay the password because the coordinator also has tool access
  4. Hash the ticket subject and leave the secret intact

Explanation

Correct Answer

A:

A ticket-reading specialist may be authorized to inspect account support data yet still lack permission to expose a customer password to a shared coordinator. The boundary must remove the secret before synthesis, retain only task-relevant facts and correct the worker's output contract so future handoffs cannot include credentials. The coordinator should also prevent raw secret values from being copied to broad traces or logs; an appropriately restricted audit record can identify that redaction occurred without retaining the password. This controls the actual information crossing the delegated context boundary rather than relying on later display filtering after exposure has already happened.

Incorrect Answers

B:

Moving a customer's password into a hidden appendix still places a reusable credential inside the report artifact. Any user or downstream service able to extract the appendix may obtain the secret, and archival copies can persist after the ticket is resolved. Confidentiality is not defined by whether text appears in the main paragraph. Redact the password from the handoff and adjust the specialist's output schema instead of relocating it to another section of the same distribution.

C:

A coordinator's own ability to access a support system is not permission to copy a customer's password into a shared narrative. Credentials require their own disclosure restrictions because they can be reused outside the immediate ticket, even by a colleague who has legitimate access to related metadata. The specialist should return only the diagnostic facts necessary to resolve the issue, with the secret redacted before the coordinator ingests the output. Broad tool access does not waive confidentiality.

D:

Hashing the ticket subject protects an unrelated piece of metadata while leaving the actual password in the shared summary. The coordinator and any downstream consumers could still read or accidentally propagate that credential. A security action must target the sensitive value that crosses the trust boundary, not a less important label. Remove the secret before model ingestion or synthesis, constrain the specialist's allowed output fields and preserve only nonsecret diagnostic data needed for the support decision.

Question 42

A pricing coordinator receives one agent's quoted amount in euros and another's in dollars. What should it do before comparing them?

  1. Compare raw numerals and select the smaller
  2. Normalize currency with an explicitly dated exchange rate and preserve original amounts
  3. Use an arbitrary constant conversion without disclosure
  4. Delete the currency symbols and claim a saving

Explanation

Correct Answer

B:

The coordinator should retain each specialist's original quote and currency, identify the decision date, and convert amounts using a documented applicable exchange rate. If service fees or checkout timing matter, those assumptions should also be visible. This creates values with comparable units while preserving evidence for later reconciliation. A conversion rate is a time-sensitive external fact, not something Claude should invent from context. When a fresh rate cannot be obtained, present conditional estimates rather than pretending the comparison is exact.

Incorrect Answers

A:

Raw numerals cannot be ranked as costs when one is denominated in euros and the other in dollars. A quoted 100 of one currency is not equal to 100 of the other, and transaction fees or dates may affect a real purchase. Preserve each original amount and currency, retrieve an applicable exchange rate for a stated date, and convert to one comparison unit before deciding which is cheaper. This prevents a misleading recommendation from an unnormalized numeric comparison.

C:

A fixed undocumented conversion constant may yield a number but cannot be audited or trusted as a current rate. Exchange rates fluctuate and differ by provider, so the chosen multiplier can reverse which offer appears cheapest. The coordinator should identify the conversion source, effective timestamp and any fee assumptions, then label the output accordingly. Treat an unknown rate as uncertainty, not an invitation to insert a convenient constant.

D:

Removing the euro and dollar symbols makes two numbers look comparable while erasing the key measurement dimension. The resulting claimed saving cannot be interpreted without knowing which amount was originally in which currency. Keep the units in the source record and in any converted result, and document how exchange assumptions affect the difference. Presentation cleanup does not perform currency normalization or establish financial savings.

Question 43

A coordinator asks four agents for broad market conclusions, yet the final report requires a recommendation for a specific customer budget. What missing information must be carried into delegation?

  1. Explicit budget and customer constraints alongside the specialists' research scopes
  2. Instructions to maximize novelty regardless of cost
  3. Estimate the customer budget from the average spending level of a similar account
  4. Only the customer name, which reveals all requirements

Explanation

Correct Answer

A:

The specialists are being asked to optimize a recommendation, but the customer's approved spending ceiling and other acceptance conditions were never supplied. Pass the relevant budget, currency, mandatory constraints and decision criteria to every specialist whose research depends on them, alongside a bounded scope and evidence requirements. The coordinator can then compare proposals using the same customer-specific limits instead of stitching together attractive but unaffordable generic recommendations. If the actual budget is missing, it should request that fact or label the recommendation conditional; neither a customer name nor similar-account statistics supplies authorized spending limits. This makes delegation tailored and auditable.

Incorrect Answers

B:

Maximizing novelty without cost constraints can produce creative market suggestions that exceed the customer's actual budget. The final report needs a decision under a known spending limit, so uniqueness is at most a secondary criterion after feasibility. Specialists should receive the approved ceiling and business requirements in their task briefs, not a generic invitation to prioritize unusual ideas. Otherwise a polished synthesis might compare options that the customer cannot buy and conceal why none satisfy the request.

C:

An average from another account is not evidence of the current customer’s authorized spending limit or constraints. It can produce a polished but unusable recommendation that exceeds the actual budget. The coordinator should pass the known approved budget to each relevant specialist or obtain it before requesting a binding comparison. If the value is unknown, keep that uncertainty explicit rather than substituting a proxy and acting as though it were confirmed.

D:

A customer name identifies a person or account but does not encode spending authority, delivery requirements or acceptable product categories. Different customers can share names, and even one customer's budget may change between projects. The coordinator cannot infer those constraints from the label attached to a case. Pass verified task-specific parameters while minimizing unrelated personal data, or ask for a missing essential value rather than treating identity as a substitute for requirements.

Question 44

A code-review coordinator asks a vulnerability specialist to analyze a patch and a test specialist to run tests. What constitutes a valid final pass?

  1. Silencing vulnerability warnings without remediation
  2. Any passing test suite on an earlier commit
  3. Both the vulnerability finding is addressed and relevant tests pass on the same patch revision
  4. A patch author's confidence without test artifacts

Explanation

Correct Answer

C:

A valid final pass requires two complementary findings on the *same* patch: the reported vulnerability is resolved under its exploit preconditions, and relevant tests demonstrate that the integrated code still meets expected behavior. Record the commit or artifact digest associated with both results, including the actual failing and passing test evidence. Where the security finding remains reproducible, the release stays blocked regardless of unrelated green tests. Where testing is incomplete, qualify the outcome rather than signing off based on a specialist's narrative about a different revision.

Incorrect Answers

A:

Silencing a vulnerability alert does not remove the exploitable code path. A reviewer needs evidence that the defect was fixed on the candidate patch revision and that relevant regression tests passed on that same artifact. Hiding the alert would produce a clean dashboard with no assurance that risk changed. Preserve the finding, reproduce or validate its underlying conditions, and re-evaluate it after a reviewed patch; never use an empty warning list as a substitute for a resolved issue.

B:

Passing tests on an earlier commit establish behavior only for that earlier code and environment. The vulnerability fix may introduce a regression, or a later integration may reintroduce the original attack path. A valid signoff needs results tied to the exact proposed release revision, together with the security review's resolution of the reported exploit. Pin commit identities and rerun relevant acceptance checks after combining changes.

D:

The patch author's confidence may motivate review but is not observable evidence that a vulnerability was removed or that the API contract remains intact. The developer could have misunderstood the exploit or skipped an integration dependency. Independent review should examine the actual diff, reproduce the relevant issue where authorized and execute acceptance tests on the release candidate. Approval requires recorded findings, not fluent self-attestation.

Question 45

A triage coordinator notices every subagent independently recommends escalation, but none provides the trigger condition. What should be added to the output contract?

  1. Require the observed trigger, evidence, urgency and destination of each escalation
  2. The maximum alert level for every finding
  3. A shared phrase saying escalate immediately
  4. Infer the escalation owner from the team that resolved the latest similar alert

Explanation

Correct Answer

A:

The escalation contract should identify the observable threshold and evidence, the urgency, and who is responsible for receiving the alert. Without those fields, six specialists could all say 'escalate' about unrelated conditions, leaving the coordinator unable to prioritize or route an incident. Ask each worker to name its triggering observation and destination, including uncertainty when criteria are not met. The coordinator can then evaluate the recommendation against current escalation policy instead of relying on vague agreement.

Incorrect Answers

B:

Choosing maximum alert severity for every finding erases the actual risk difference between a minor anomaly and a verified urgent incident. It also fails to say what evidence triggered an alert or who should act. The workflow needs event-specific conditions, urgency and recipient ownership. Severity should follow observed impact and policy, not a convenient default that makes all reports superficially actionable.

C:

A shared phrase such as 'escalate immediately' makes outputs look consistent while withholding the information an operator needs. It does not identify a threshold, the affected system, supporting event, or accountable response team. If specialists produce only this slogan, the coordinator cannot distinguish a real emergency from a speculative warning. Require structured trigger evidence and routing metadata rather than duplicate language.

D:

The team that handled the last similar incident may no longer own the service or be on call, and the current event may have different escalation rules. Inferring the destination from history can misroute a time-sensitive issue. Workers should provide the current policy-defined owner or state that routing is unresolved, along with the observed trigger and urgency. Historical examples can inform an investigation but cannot replace authoritative current routing information.

Question 46

A multiagent analysis reuses findings from a previous customer in a new customer's case. Which coordinator safeguard addresses context contamination?

  1. Suppress customer identifiers everywhere, including audit metadata
  2. Assume reused data is harmless if technically similar
  3. Bind every specialist input and output to the current tenant and case identifier
  4. Merge all customers into a shared context for efficiency

Explanation

Correct Answer

C:

Each subagent assignment should carry a stable tenant, case and run identifier, and its returned evidence must be checked against that scope before aggregation. Shared cache or scratchpad entries need stored provenance and an authorization check at retrieval; labeling an old result with a new case number is not acceptable. This design prevents a late or stale worker response from being mistaken for the current customer's findings and leaves an audit trail for authorized corrections. General public documentation may still be shared, but customer-specific records must remain isolated.

Incorrect Answers

A:

Erasing case identifiers everywhere would make it impossible to determine whether a worker received an earlier customer's evidence or the correct task data. Privacy minimization does not mean losing authorized provenance in controlled audit metadata. Keep tenant and case binding in access-controlled records, while avoiding unnecessary personal details in shared summaries. The coordinator must be able to reject findings whose original scope does not match the current customer's request.

B:

Technical similarity between two customer problems does not grant permission to reuse the first customer's confidential records. A diagnostic snippet might include account IDs, internal URLs or secrets, and an apparently identical symptom can arise from different states. Segregate context by tenant and run, retrieve fresh authorized evidence for the current case, and reuse only properly sanitized and independently allowed general knowledge.

D:

Merging all customers into one unrestricted context creates avoidable disclosure and contamination risks. A search result from customer A could be quoted in customer B's report, and the model might not recognize the boundary because the data are linguistically similar. Shared systems need per-tenant access checks and provenance labels at the storage layer, not an unguarded common memory pool. Efficient reuse must be limited to information whose scope actually permits it.

Question 47

A synthesis agent has two expert reports that both provide confidence scores but use different scales. What should it do?

  1. Calibrate or contextualize the scales before comparing confidence values
  2. Take the larger number as more reliable
  3. Discard uncertainty and issue a categorical answer
  4. Average the raw values without normalization

Explanation

Correct Answer

A:

Confidence scores are not comparable without their scales and calibration rules. An agent returning 0.8 and another returning 85 may both describe high confidence using different numeric ranges, but their numbers need interpretation before ranking. Preserve the original score, units and definition; normalize only when a justified transformation exists. Evidence quality may remain incomparable even after simple numeric scaling. A coordinator should contextualize uncertainty rather than assume every specialist confidence number measures the same event.

Incorrect Answers

B:

Selecting the larger raw number mistakes representation for certainty. A rating of 90 on a 0–100 scale can correspond to 0.9 on a 0–1 scale, while an uncalibrated verbal score may mean something different entirely. Compare confidence definitions, evidence scope and calibration before ranking findings. A worker's chosen numeric range cannot itself make its assessment more authoritative than a second worker's.

C:

Removing uncertainty converts probabilistic or limited evidence into an unwarranted categorical result. The specialists may disagree because they used different confidence scales or saw different supporting facts. Synthesis should preserve what each score means, the source of the evidence and any unresolved assumptions. If the scales cannot be reliably aligned, report qualified conclusions instead of forcing certainty that neither expert supplied.

D:

The arithmetic mean of numbers from different scales has no meaningful interpretation. Averaging 0.7 with 70 as raw values would make a result near 35, which is neither a probability nor a calibrated confidence level. First identify units, transform when legitimate, and verify that the scores represent comparable uncertainties. Even normalized values should not be averaged blindly if the specialists' observations are dependent or uncalibrated.

Question 48

A payroll assistant has a document-retrieval subagent and a payment-execution subagent. A retrieved invoice contains a sentence instructing the coordinator to pay a different bank account. What coordinator design blocks this instruction crossing the trust boundary?

  1. Forward every sentence to the payment agent as mandatory instructions
  2. Let the retrieval agent execute payments directly
  3. Remove the bank-change instruction from the invoice text and execute payment using the invoice’s newly printed account field
  4. Treat retrieved invoice text as data and require the approved payment workflow to authorize any destination change

Explanation

Correct Answer

D:

The new bank account printed inside the invoice and the sentence asking for its use are both lower-trust document content. The coordinator should preserve them as facts requiring review, but it must not elevate either into permission to modify the beneficiary. The payment workflow should verify any bank change through an authenticated, independently approved channel and bind approval to the exact destination and transaction. The retrieval worker supplies evidence only; the payment executor enforces recipient and spending authorization before any irreversible side effect. This protects against instruction injection and against ordinary field-level tampering that would survive deletion of an obviously malicious sentence.

Incorrect Answers

A:

An invoice may contain ordinary billing facts and also attacker-controlled instructions, such as a demand to change the payee's bank account. Forwarding every line as a command would give the document author control over a privileged payment agent. The retrieval specialist should return evidence with source provenance, not new policy or authorization. The coordinator must evaluate any destination change against a separately approved, authenticated financial workflow before an external transfer occurs. Text found in an attachment cannot issue instructions on behalf of the payer.

B:

The document-reading subagent needs access to invoice contents for extraction, not authority to move funds. Letting it perform payments would collapse the separation between untrusted source processing and a high-impact transaction. A malicious invoice could then trigger a transfer using values the same worker just read. Keep payment tools scoped to the approved executor, require an authenticated beneficiary and authorized payment amount, and report the real provider outcome only after an approved call completes.

C:

Removing the instruction sentence alone does not protect the payment boundary if the same untrusted document also supplies the new account number. Retrieval output is data, not an authorization to alter the approved beneficiary. The coordinator needs a separate authenticated payment-change workflow and a known approved destination. Otherwise the lower-trust invoice still controls an irreversible action through its ordinary fields rather than through explicit imperative wording.

Question 49

A coordinator delegates two independent read-only inventory checks but then runs a reservation that needs both results. Which scheduling policy is safe?

  1. Use the last cached balance for the delayed warehouse only when its record has not passed the ordinary inventory cache TTL
  2. Select the first read result as sufficient
  3. Issue the reservation alongside both reads
  4. Run the reads concurrently, then reserve only after both results validate the stock condition

Explanation

Correct Answer

D:

Because the warehouse lookups do not depend on one another, the coordinator can issue them concurrently and preserve each response under its own request identifier. The reservation is different: it depends on both successful, current stock observations satisfying the requested quantity. Gate that consequential write on the combined predicate and revalidate or use transactional concurrency controls so another buyer cannot consume the same units between read and commit. If either read fails or reports shortage, block the reservation and report the specific gap. This separates safe parallel observation from dependent mutation rather than treating all three operations as independent.

Incorrect Answers

A:

A cache may still be within its usual freshness window while failing a stronger reservation-specific requirement. The stem states that the reservation needs both current independent read results before committing stock. A TTL check does not ensure that another reservation has not consumed units since caching. Await or revalidate both sources, and perform the actual stock mutation with concurrency protection.

B:

The first warehouse read may report sufficient inventory at one location but says nothing about the second required location. The reservation depends on a joint stock condition, so a single positive observation cannot satisfy it. The coordinator should correlate and validate both read results before attempting the write, and make missing or failed reads explicit. A fast result is not a substitute for the other warehouse's state, particularly when a reservation can consume real stock and affect other orders.

C:

Dispatching a reservation alongside the two stock checks turns a prerequisite into a race. The booking tool may commit inventory before the slower warehouse reports insufficient units, making the final action inconsistent with the stated two-source requirement. Execute the independent reads concurrently if beneficial, but place the state-changing reservation downstream of both validated results. Authorization, current availability and concurrency protection are still needed at commit; a scheduling optimization cannot waive the factual gate.

Question 50

A coding subagent develops a suggested patch in an isolated worktree. While it works, the coordinator changes the same module on the main branch. The subagent returns a patch based on the older commit. What must happen before the coordinator applies it?

  1. Apply the child patch as a forced overwrite because isolated worktrees prevent all merge conflicts
  2. Check the patch base and changed paths, reconcile conflicts against the current branch, and run relevant tests on the integrated revision
  3. Accept the patch solely when its timestamp is newer than the parent edit
  4. Treat the subagent’s passing worktree tests as proof the merged main branch is correct without retesting

Explanation

Correct Answer

B:

The child’s result is based on a particular commit and may conflict with work completed in the parent branch. Record that base, inspect the actual diff and changed paths, and merge or rebase using the current authorized branch as the integration target. Resolve any overlapping edits deliberately rather than by completion time. Then rerun applicable tests and review the exact merged artifact. Isolated development simplifies ownership; it does not provide automatic proof that two concurrent edits remain compatible.

Incorrect Answers

A:

An isolated worktree protects the child from modifying the parent’s files while it develops its patch, but it does not make later integration conflict-free. The coordinator changed the target module after the child branched, so forcing an overwrite can erase authorized parent changes. A patch must be compared against its actual base and the current target. Reconciliation and testing are required before promoting work from one branch into another.

C:

A wall-clock timestamp cannot show whether a patch includes a newer business rule, preserves all parent edits or even targets the correct revision. Clock skew and differing branch histories make last-finished-wins an unreliable merge policy. The coordinator must compare committed ancestry and changed content rather than trusting arrival time. An apparently recent child result can still overwrite a later parent edit unless its changes are reconciled against the target branch.

D:

Tests on the child’s independent worktree establish behavior only for that child revision. Integration can introduce new code combinations or resolve a conflict incorrectly, and tests that passed before the merge may no longer cover the resulting code. The coordinator should preserve the child test evidence as useful input but must validate the integrated commit. Worktree isolation is not a substitute for post-merge correctness checks.


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