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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 13

Question 120

A text-processing tool advertises 'verify the accuracy of external claims,' but its implementation merely extracts keywords and summarizes supplied paragraphs. Agents quote its success status as proof of verification. What is the right correction?

  1. Have the summarizer always append the word 'true' so its output looks like a fact-check report.
  2. Rewrite the tool description and response schema to reflect summarization only, without claiming independent validation.
  3. Keep the accuracy-verification claim because an internal tool's successful execution implies factual correctness.
  4. Remove all output labels and let downstream agents assume a summary is a formal audit.

Explanation

Correct Answer

B:

A model can only rely on capabilities that the tool actually implements. Lexical extraction and summarization may organize evidence but do not establish whether a real-world claim is true. The tool should expose its limited operation explicitly, remove misleading 'verified' signals, and return summaries with clear provenance boundaries. If independent claim checking is required, it needs a separate evidence-comparison workflow with appropriate sources and criteria rather than inflated metadata on a text summarizer.

Incorrect Answers

A:

Appending a truth label without checking evidence manufactures assurance. Users may act on wrong assertions because the result appears to be verified. The appropriate response is to narrow the contract or build a genuinely evidence-based verification capability. That label would have no relationship to cited verification evidence.

C:

Execution success proves only that the code completed its programmed work. It cannot transform an unsupported summary into an externally validated fact. The catalog must describe implemented behavior and avoid misleading success labels. The implementation must test sources, not merely finish processing text.

D:

Omitting labels does not correct the missing verification mechanism. It may make provenance and limitations even harder to identify. Explicit, accurate result semantics are necessary for safe downstream use. The model would lack both source boundaries and verification criteria, leaving the asserted audit status unsupported.

Question 121

A customer-support MCP lookup checks whether an order has shipped. Some orders are awaiting allocation and have no scheduled ship date. The schema calls ship_date a mandatory string, causing the assistant to invent tomorrow's date. What should the tool designer change?

  1. Mark ship_date nullable and explicitly explain that absence means no confirmed date.
  2. Keep the required string and fill it with the current date whenever the field is missing.
  3. Return a generic server error whenever a successful order contains a null ship_date.
  4. Remove the ship_date property altogether and instruct the assistant to estimate from typical delivery times.

Explanation

Correct Answer

A:

The data contract should express the backend's actual states. A nullable date communicates that the system cannot currently provide a confirmed shipping schedule; it is not an invitation to manufacture a default. The description should tell the assistant to say that a date is unavailable and distinguish that from a failed lookup. This preserves the successful order-status response while preventing a fabricated delivery commitment. Optionality is a schema and interpretation decision, not merely a prompt to be more careful.

Incorrect Answers

B:

The current date has no connection to allocation or carrier scheduling, so this substitutes invented data for an unknown state. It makes downstream tracking and customer-facing commitments factually incorrect. A correct model of nullability should precede presentation formatting and should not silently change backend facts.

C:

An unassigned ship date is a legitimate business state, not evidence that the lookup infrastructure failed. Converting it to a transport-style failure would trigger unnecessary retries and mask the useful order status. The tool can return a successful response with a documented absent field.

D:

Eliminating the field deprives the assistant of confirmed dates for orders that have them. An estimate may be useful if explicitly requested and supported by policy, but it is not a substitute for an authoritative date. The interface should retain the nullable property and its source meaning.

Question 122

A research coordinator has already collected a regulation PDF and asks a citation-writing subagent to check whether one quoted sentence supports the claim 'the filing deadline is 30 days.' The subagent repeatedly searches the open web instead of inspecting that PDF. Which tool would best focus this subagent?

  1. A general web_search tool configured with a higher daily request limit.
  2. A verify_claim_against_source tool taking the claim, source identifier, and passage evidence.
  3. A publish_report tool that accepts the draft paragraph and posts it immediately.
  4. A summarize_entire_library tool that concatenates every known legal document.

Explanation

Correct Answer

B:

A purpose-specific verifier directs the specialist toward the actual decision: whether the identified source supports the asserted thirty-day limit. Its inputs can require the quoted claim and a document reference, while its output can identify a supporting passage or explicit non-support. That design reduces indiscriminate browsing, preserves source attribution, and makes unsupported claims distinguishable from missing text. The tool should not promise truth beyond the inspected source or invent a citation when the source is silent.

Incorrect Answers

A:

Larger search limits do not solve a task-definition mismatch. The evidence to check is already identified, and additional web results could introduce unrelated versions or jurisdictions. The specialist needs a way to examine the supplied document and the precise claim, with a bounded evidence result.

C:

Publishing cannot establish whether a legal quotation is supported. It adds a side effect at the point where an evidentiary check is required and would make an incorrect citation harder to correct. Verification should be read-oriented and completed before any publication stage.

D:

Whole-library summarization expands context and can obscure the single version and passage relevant to the claim. It may inadvertently mix different regulations while still failing to test the specific deadline. Narrow source-grounded verification provides a more auditable yes/no-or-uncertain assessment.

Question 123

Two MCP tools, list_recent_orders and search_order_history, are both relevant to the phrase 'show recent orders.' In production, Claude alternates between them and sometimes misses cancelled orders. Which TWO actions would most directly improve the tool-selection contract? (SELECT TWO)

  1. Collect actual ambiguous customer requests and test which tool is chosen against the intended coverage.
  2. Delete the cancellation status from all tool outputs so the two result sets look identical.
  3. Force random alternation between the two tools on each new conversation.
  4. Refine the descriptions to distinguish date-window lists from historical searches, including cancelled-order behavior.
  5. Increase model temperature until the distribution of calls appears balanced.

Explanation

Correct Answers

A:

Representative requests reveal the specific overlap rather than relying on hypothetical tool names. A test set should include 'recent orders,' cancelled-order edge cases, and variations in the time horizon, then record which interface was selected and whether it returned the required records. The measured failures provide feedback for improving descriptions. Because the goal is tool routing, evaluators should keep the request and expected behavior fixed while comparing the selection changes.

D:

The tool catalog is part of the model's available evidence for selecting an action. Precise descriptions should state filters, time windows, status coverage, and when the other tool is preferable. In this example the key distinction is whether cancelled orders are included and how far back records can be retrieved. Improving that information reduces the likelihood of a plausible but incomplete call. Retest with the previously failing phrases rather than assuming the wording alone cures routing.

Incorrect Answers

B:

Removing a status conceals exactly the difference the user needs. It also cannot disambiguate tool selection, because Claude still sees overlapping descriptions. The correct remedy is to define each tool's operational scope and test its selection, not erase meaningful data.

C:

Random selection spreads failures rather than learning which tool handles the requested record set. It makes regression results nonreproducible and may omit cancelled orders even more often. An explicit contract and case-based tests are required to resolve ambiguity. The user needs accurate inclusion of cancelled orders.

E:

A balanced call distribution is not the success metric: correctly retrieving the required order records is. Higher sampling variability cannot repair unclear semantics and may make routing harder to reproduce. Tool selection needs grounded descriptions and targeted evaluation cases. Each route should be judged by factual retrieval correctness.

Question 124

A customer profile MCP tool reaches a database and gets a definitive 'permission denied' from the authorization layer. Its adapter returns ordinary success content containing the words 'permission denied', and the coordinator subsequently reports that the profile was read. How should the adapter represent the outcome?

  1. Return an empty successful customer object because the database was reachable.
  2. Throw an unrelated JSON-RPC 'unknown method' protocol error to ensure any error is visible.
  3. Set the MCP tool-result isError indicator and include a safe typed authorization failure.
  4. Return success=true and add 'unavailable' to the result narrative for the model to infer.

Explanation

Correct Answer

C:

MCP explicitly represents tool execution failures with isError: true, distinguishing them from a successful call that happens to return text. The adapter should carry a stable permission-denied category and an appropriately restricted explanation, so the coordinator can avoid treating the read as complete. It should not disclose customer data or internal credentials when describing the denial. This choice addresses the observed misinterpretation at the protocol boundary; backend access controls still must enforce the prohibition independently.

Incorrect Answers

A:

Connectivity is not the same as permission to perform the requested operation. A fabricated empty object might be treated as a valid but blank profile and conceal an access-control denial. The tool must preserve the failure semantics and avoid exposing protected customer content.

B:

The requested tool exists and the call reached application logic, so claiming an unknown method would misdiagnose the fault. MCP distinguishes protocol failures from tool execution errors. The agent needs the business-relevant permission outcome, not a fabricated transport problem. The failure belongs to the tool execution itself.

D:

A success envelope contradicts the actual access-control decision. Natural-language disclaimers are easy for downstream steps to ignore, as this scenario already demonstrates. Explicit error signaling and a typed category are needed for reliable control-flow handling. Application-level contradictions need protocol-level correction.

Question 125

A storefront search MCP tool successfully queries inventory but finds zero products matching a very specific size and color. The coordinator currently treats a zero-length list as a service outage and retries five times. Which response classification is appropriate?

  1. Report a temporary transport failure because the requested item was not found.
  2. Report a successful search with matches=[] and any relevant filter metadata.
  3. Invent the nearest SKU and mark it as an exact match so the user sees an actionable choice.
  4. Return an authorization error because the inventory catalog did not expose the requested SKU.

Explanation

Correct Answer

B:

The request executed correctly and returned a meaningful negative result. A successful envelope with an empty matches collection allows the assistant to distinguish 'no products satisfy these filters' from 'inventory could not be checked.' Include the applied size and color filters if useful so the customer can refine the request. No retry should be scheduled solely because the result list is empty. Retries are appropriate only when a separately reported transient execution failure occurs.

Incorrect Answers

A:

Absence of matching inventory is not evidence of a network or server failure. A transient error encourages retries that cannot change the query semantics. The customer should receive an accurate no-match result and may choose different search criteria. An absent SKU cannot be resolved through retries alone.

C:

A near alternative might be offered explicitly, but it must not be labeled an exact filter match. Doing so corrupts the search contract and could lead to incorrect orders. Preserving an accurate empty result keeps the assistant free to ask whether substitutions are acceptable.

D:

Authorization errors mean the caller lacked access to an operation or resource, not that no products matched approved query filters. Misclassifying a no-match result would mislead operators and might prompt unnecessary credential changes. The lookup should succeed with an empty collection.

Question 126

An account-status tool times out once while reading a customer record. The identifier is valid, no write was attempted, and the service normally responds quickly. What structured recovery signal should the connector emit?

  1. A permanent validation error instructing the agent to change the customer identifier.
  2. A successful response with a guessed account state, followed by a background verification suggestion.
  3. A tool error categorized as transient, retryable=true, with a short bounded retry policy.
  4. An instruction to retry continuously without a timeout or maximum attempt count.

Explanation

Correct Answer

C:

The failed operation was a read-only lookup with a valid input, so a single timeout plausibly reflects temporary connectivity or service load. A typed transient error lets the caller retry with a limited count and backoff, while preserving the original customer identifier and tracking the attempts. If those attempts fail, the coordinator should report the status as unavailable rather than fabricate a result. Read-only retriability is different from retrying an uncertain side-effecting transaction such as a refund.

Incorrect Answers

A:

The input was valid; no evidence suggests a syntax or domain validation problem. Telling the agent to change identifiers could query a different customer and introduce privacy risk. The failure should describe the read timeout and bounded retry conditions instead.

B:

Inventing account status erases the distinction between unavailable data and verified records. A later check cannot make the initial guess trustworthy. The safest immediate response is an explicit transient failure with no definitive account status until a read succeeds. Customer-service replies must distinguish estimated from recorded facts.

D:

An unbounded loop can overload a degraded service, consume resources, and block customer response indefinitely. Even legitimate transient failures require a retry budget and a fallback path. The structured result should make that limit explicit so the agent can stop safely.

Question 127

An order lookup rejects 'PO/??' because order identifiers must match a documented alphanumeric pattern. The research agent retries the exact same invalid string after every rejection. Which tool-execution response best supports correction?

  1. A validation failure with isError=true, retryable=false for unchanged input, and the allowed identifier format.
  2. A transient timeout error with retryable=true to encourage additional attempts.
  3. A successful empty-order response with no indication that validation ran.
  4. A generic server crash with no field-level detail.

Explanation

Correct Answer

A:

The failure is deterministic for the supplied value: repeated calls with the same malformed identifier cannot succeed. A structured validation category and the accepted pattern let the agent ask for or derive a corrected identifier rather than burn retries. MCP tool-execution errors can carry actionable feedback while preserving a clear unsuccessful state. The retryable=false classification applies to repeating the rejected request unchanged; a corrected identifier may form an entirely new valid request after suitable user verification.

Incorrect Answers

B:

There is no timeout or infrastructure uncertainty in this scenario. Encoding a syntax rejection as a transient problem misdirects recovery and can generate avoidable traffic. The rejected identifier must be corrected before a new lookup can be productive. The identifier is invalid under a deterministic format rule.

C:

An empty successful result means a valid search found nothing, which is different from a request the backend refused to evaluate. Conflating the two can cause the assistant to tell a customer that an order does not exist. The explicit validation failure preserves that distinction.

D:

A crash report obscures a known user-correctable constraint. The model needs the documented identifier rule to proceed safely and avoid repeating the bad argument. The connector can provide a sanitized validation message without exposing sensitive internals. Targeted correction is preferable to an opaque failure.

Question 128

A support assistant asks the refund MCP tool to reimburse $950 on an order whose policy cap is $300. The backend rejects the action and has no authority to override the cap. The assistant suggests retrying until it succeeds. What should the tool report?

  1. A rate-limit error with a Retry-After timestamp, so the assistant tries after a delay.
  2. A successful refund with the amount reduced silently to $300.
  3. A nonretryable business-policy error with the capped rule and authorized escalation route.
  4. A temporary network error, because the model might have better luck on a second request.

Explanation

Correct Answer

C:

The backend has reached a definitive policy decision rather than a transient infrastructure problem. A typed business-policy failure with retryable=false prevents the model from hammering the same prohibited refund request. The response should explain the maximum and provide a safe path to a human or designated approver, without implying that the current tool can override authorization. Financial mutations should also preserve an audit trail and never claim that money moved when the backend refused it.

Incorrect Answers

A:

No service throttle is present; the refusal follows a business rule. Waiting does not create an exemption from the refund cap. A false throttling status would encourage repeated unauthorized write attempts instead of the required escalation. The policy limit remains binding after any delay.

B:

Silently changing the requested financial transaction would misrepresent both user intent and outcome. If a partial refund is an allowable alternate action, it requires a distinct authorization flow. The rejected $950 request must not be reported as committed. Recording the rejected amount is essential for auditability.

D:

The request was processed and explicitly rejected. Presenting an authorization policy as network uncertainty is inaccurate and may cause dangerous repeated attempts. The agent must respect the backend rule and route exceptions through the approved escalation mechanism. Rejections cannot be bypassed by network-level recovery.

Question 129

The MCP connector's token is valid and the server is reachable, but an account-view request returns HTTP 403 for a customer record outside the analyst's permissions. The coordinator assumes the token expired and repeatedly asks the analyst to reauthenticate. Which classification is best?

  1. Expired authentication; request an immediate login renewal.
  2. Successful lookup with an empty profile, because the record is inaccessible.
  3. Transient server failure; retry with exponential backoff until permissions appear.
  4. Authorization denied for the requested record, with no sensitive record details disclosed.

Explanation

Correct Answer

D:

HTTP 403 after successful authentication indicates that the principal lacks permission for the requested operation or resource. The error category should say permission denied and avoid revealing whether restricted record fields exist or their values. The assistant can explain it cannot access the requested profile and use an authorized escalation channel. Confusing authorization with token expiry wastes recovery steps and risks encouraging attempts to circumvent a deliberate access policy.

Incorrect Answers

A:

The connector has already authenticated successfully, so refreshing a valid token does not grant missing record permissions. It might prompt unnecessary access requests and still produce the same failure. Authentication status should be distinguished from the authorization decision. Permission changes require authorization, not routine token refresh.

B:

Access denied does not establish that a customer profile is empty or absent. Returning a fabricated success may lead the assistant to infer a negative business fact from a permission boundary. The connector should preserve the denial and withhold the protected record.

C:

The backend is functioning and has issued a stable authorization refusal. Repeated calls with the same identity and permissions will not make that refusal transient. This error needs a permission-aware path, not automated polling. The resource boundary is stable under this caller identity.

Question 130

A multi-agent research workflow has a search specialist that returns only 'failed' when a citation lookup produces no usable result. The coordinator cannot tell whether the search used the wrong journal title, a restrictive date filter, or the wrong country. Which response improvement best supports recovery?

  1. Include the attempted query, filter scope, and an error category in a sanitized failure result.
  2. Omit all query parameters because the coordinator might anchor on them.
  3. Return a made-up citation so the coordinator can continue drafting.
  4. Mark every failure as server-down so the coordinator automatically retries the same query.

Explanation

Correct Answer

A:

The parent agent needs enough context to choose a justified next step without replaying the entire discovery process. Return the terms and approved search scope actually attempted, together with whether the failure was no-match, timeout, or authorization-related. That makes it possible to adjust a date filter or select a different source deliberately. Avoid copying secret tokens or irrelevant raw backend traces. The primary goal is transparent error provenance, not simply a louder 'failed' message.

Incorrect Answers

B:

Hiding the attempt prevents reproducibility and makes each retry a blind guess. The coordinator cannot isolate a wrong journal or date bound without seeing the searched scope. Sanitized parameters are operational evidence, not a reason to expose credentials. Replaying the failed scope is necessary for diagnosis.

C:

A fabricated reference converts a recoverable retrieval problem into an evidentiary integrity failure. Later citation checks may not detect the invented source immediately. The workflow should explicitly report uncertainty or unavailable evidence until a real citation is found. Evidence must be obtained before a publication claim.

D:

No-match, restrictive filters, and transient outages require different recovery actions. An unconditional server-down label masks meaningful diagnostics and encourages ineffective repeat calls. Typed error categories and attempted parameters allow a targeted response. Recovery should respond to cause, not a universal fallback label.

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