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DevNet Associate (DEVASC) 200-901 Practice Test 24

Question 230

The initial implementation fails or does not meet the expected behavior. A REST service supplies rel="next" in the Link header rather than nextCursor in JSON, and a collector never advances pages. Which investigation should be prioritized to diagnose the problem?

  1. Inspect URL construction, header placement and redacted request traces.
  2. Inspect SDK method signature, operation result and device identifier semantics.
  3. Compare HTTP verb, required JSON schema and response status with the API reference.
  4. Inspect Link header rel values, next URL and visited-page count.

Explanation

Correct Answer

D:

Inspect Link header rel values, next URL and visited-page count. These are the relevant initial evidence checks for Parse Link header for next page. Intended action: Read the documented Link response header and follow the next relation until it is absent. Expected success condition: The collector retrieves both pages while preserving resource objects from each valid response.

Incorrect Answers

A:

Inspect URL construction, header placement and redacted request traces. This investigation primarily applies to Bearer token separation from query string, not the current Parse Link header for next page problem. Prioritize: Inspect Link header rel values, next URL and visited-page count.

B:

Inspect SDK method signature, operation result and device identifier semantics. This investigation primarily applies to RPC action versus REST resource semantics, not the current Parse Link header for next page problem. Prioritize: Inspect Link header rel values, next URL and visited-page count.

C:

Compare HTTP verb, required JSON schema and response status with the API reference. This investigation primarily applies to POST creates an alarm subscription, not the current Parse Link header for next page problem. Prioritize: Inspect Link header rel values, next URL and visited-page count.

Question 231

A Cisco network automation team has this requirement: A legacy lab endpoint explicitly documents HTTP Basic authentication over TLS, but the client sends a bearer token it cannot parse. Which design or implementation action best addresses it?

  1. Send GET /devices with site=west as a URL query parameter and the required authorization header.
  2. Pin the supported API version and adapt parsing to the documented versioned schema with explicit validation.
  3. Reuse a requests.Session with trusted certificate validation and bounded timeouts rather than disabling TLS verification.
  4. Send the required Basic authorization credentials through the HTTP client's supported auth interface over verified HTTPS.

Explanation

Correct Answer

D:

Send the required Basic authorization credentials through the HTTP client's supported auth interface over verified HTTPS. Technical reason: HTTP Basic encodes a username/password pair and requires TLS for confidentiality in transit. Verify by: The server authenticates the lab account and the request does not expose credentials in logs. Deployment qualification: Basic encoding is not encryption; never use it over plaintext HTTP.

Incorrect Answers

A:

Send GET /devices with site=west as a URL query parameter and the required authorization header. This instead targets the different case GET filtered devices using query parameters. The described Basic authentication for an approved legacy service requirement specifically calls for Send the required Basic authorization credentials through the HTTP client's supported auth interface over verified HTTPS.

B:

Pin the supported API version and adapt parsing to the documented versioned schema with explicit validation. This instead targets the different case Respect versioned API fields. The described Basic authentication for an approved legacy service requirement specifically calls for Send the required Basic authorization credentials through the HTTP client's supported auth interface over verified HTTPS.

C:

Reuse a requests.Session with trusted certificate validation and bounded timeouts rather than disabling TLS verification. This instead targets the different case Reuse requests Session with certificate verification. The described Basic authentication for an approved legacy service requirement specifically calls for Send the required Basic authorization credentials through the HTTP client's supported auth interface over verified HTTPS.

Question 232

After deployment, an engineer must prove the proposed solution works. A legacy lab endpoint explicitly documents HTTP Basic authentication over TLS, but the client sends a bearer token it cannot parse. Which observed result is the most direct acceptance evidence?

  1. The server authenticates the lab account and the request does not expose credentials in logs.
  2. The captured request body is valid JSON and the server recognizes its expected media type.
  3. One event produces one queued job and the provider stops retrying after successful acknowledgement.
  4. A simulated text/html response is rejected as unexpected content without misleading key errors.

Explanation

Correct Answer

A:

The server authenticates the lab account and the request does not expose credentials in logs. Recommended implementation: Send the required Basic authorization credentials through the HTTP client's supported auth interface over verified HTTPS. Why the observation matters: HTTP Basic encodes a username/password pair and requires TLS for confidentiality in transit.

Incorrect Answers

B:

The captured request body is valid JSON and the server recognizes its expected media type. That observation could confirm Use requests.post json parameter, not the current Basic authentication for an approved legacy service case. For this case, the decisive observation is: The server authenticates the lab account and the request does not expose credentials in logs.

C:

One event produces one queued job and the provider stops retrying after successful acknowledgement. That observation could confirm Acknowledge webhook quickly and queue work, not the current Basic authentication for an approved legacy service case. For this case, the decisive observation is: The server authenticates the lab account and the request does not expose credentials in logs.

D:

A simulated text/html response is rejected as unexpected content without misleading key errors. That observation could confirm Content-Type guards JSON parsing, not the current Basic authentication for an approved legacy service case. For this case, the decisive observation is: The server authenticates the lab account and the request does not expose credentials in logs.

Question 233

A developer is explaining the underlying technical behavior. A legacy lab endpoint explicitly documents HTTP Basic authentication over TLS, but the client sends a bearer token it cannot parse. Which principle is most relevant to this case?

  1. HTTP Basic encodes a username/password pair and requires TLS for confidentiality in transit.
  2. Sessions pool HTTP connections and certificate verification authenticates the remote endpoint.
  3. 204 No Content deliberately indicates success without a response payload.
  4. Pagination breaks large collections into bounded responses navigated through continuation metadata.

Explanation

Correct Answer

A:

HTTP Basic encodes a username/password pair and requires TLS for confidentiality in transit. This mechanism explains Basic authentication for an approved legacy service. Action: Send the required Basic authorization credentials through the HTTP client's supported auth interface over verified HTTPS. Expected confirmation: The server authenticates the lab account and the request does not expose credentials in logs.

Incorrect Answers

B:

Sessions pool HTTP connections and certificate verification authenticates the remote endpoint. This relates to Reuse requests Session with certificate verification. In the current Basic authentication for an approved legacy service case the operative principle is: HTTP Basic encodes a username/password pair and requires TLS for confidentiality in transit.

C:

204 No Content deliberately indicates success without a response payload. This relates to Interpret 204 No Content. In the current Basic authentication for an approved legacy service case the operative principle is: HTTP Basic encodes a username/password pair and requires TLS for confidentiality in transit.

D:

Pagination breaks large collections into bounded responses navigated through continuation metadata. This relates to Traverse cursor-based pagination. In the current Basic authentication for an approved legacy service case the operative principle is: HTTP Basic encodes a username/password pair and requires TLS for confidentiality in transit.

Question 234

A team does not apply the necessary control or correction. A legacy lab endpoint explicitly documents HTTP Basic authentication over TLS, but the client sends a bearer token it cannot parse. Which resulting failure or risk is most directly relevant?

  1. Raw URL concatenation and infinite waits can produce wrong filters and stuck jobs.
  2. Putting Basic credentials in a URL leaks them through browser and proxy histories.
  3. Granting administrator rights for a single denied method violates least privilege.
  4. Discarding cached data on 304 creates empty reports despite no upstream change.

Explanation

Correct Answer

B:

Putting Basic credentials in a URL leaks them through browser and proxy histories. This is the direct exposure for Basic authentication for an approved legacy service. Mitigate with: Send the required Basic authorization credentials through the HTTP client's supported auth interface over verified HTTPS. Check success by: The server authenticates the lab account and the request does not expose credentials in logs.

Incorrect Answers

A:

Raw URL concatenation and infinite waits can produce wrong filters and stuck jobs. This risk occurs in the different Use requests.get with params and timeout situation. For the given Basic authentication for an approved legacy service requirement, the directly relevant risk is: Putting Basic credentials in a URL leaks them through browser and proxy histories.

C:

Granting administrator rights for a single denied method violates least privilege. This risk occurs in the different 403 Forbidden despite valid authentication situation. For the given Basic authentication for an approved legacy service requirement, the directly relevant risk is: Putting Basic credentials in a URL leaks them through browser and proxy histories.

D:

Discarding cached data on 304 creates empty reports despite no upstream change. This risk occurs in the different Handle conditional GET with 304 situation. For the given Basic authentication for an approved legacy service requirement, the directly relevant risk is: Putting Basic credentials in a URL leaks them through browser and proxy histories.

Question 235

The initial implementation fails or does not meet the expected behavior. A legacy lab endpoint explicitly documents HTTP Basic authentication over TLS, but the client sends a bearer token it cannot parse. Which investigation should be prioritized to diagnose the problem?

  1. Inspect identity, role assignments, method-specific permissions and server authorization logs.
  2. Inspect status code, job location, state transitions and final device evidence.
  3. Compare HTTP verb, required JSON schema and response status with the API reference.
  4. Inspect Authorization scheme, TLS certificate validity and authentication audit events.

Explanation

Correct Answer

D:

Inspect Authorization scheme, TLS certificate validity and authentication audit events. These are the relevant initial evidence checks for Basic authentication for an approved legacy service. Intended action: Send the required Basic authorization credentials through the HTTP client's supported auth interface over verified HTTPS. Expected success condition: The server authenticates the lab account and the request does not expose credentials in logs.

Incorrect Answers

A:

Inspect identity, role assignments, method-specific permissions and server authorization logs. This investigation primarily applies to 403 Forbidden despite valid authentication, not the current Basic authentication for an approved legacy service problem. Prioritize: Inspect Authorization scheme, TLS certificate validity and authentication audit events.

B:

Inspect status code, job location, state transitions and final device evidence. This investigation primarily applies to Interpret 202 Accepted as asynchronous work, not the current Basic authentication for an approved legacy service problem. Prioritize: Inspect Authorization scheme, TLS certificate validity and authentication audit events.

C:

Compare HTTP verb, required JSON schema and response status with the API reference. This investigation primarily applies to POST creates an alarm subscription, not the current Basic authentication for an approved legacy service problem. Prioritize: Inspect Authorization scheme, TLS certificate validity and authentication audit events.

Question 236

A Cisco network automation team has this requirement: A modern Meraki integration expects an API credential in the documented authentication header; a developer appends the token to URLs logged by proxies. Which design or implementation action best addresses it?

  1. Move the token into the authorized HTTP header and keep it out of query parameters and logs.
  2. Read the documented Link response header and follow the next relation until it is absent.
  3. Validate the notification, enqueue a durable job and return the required 2xx acknowledgement promptly.
  4. Select the documented RPC or action call for reboot rather than trying to update an unrelated GET resource with an invented field.

Explanation

Correct Answer

A:

Move the token into the authorized HTTP header and keep it out of query parameters and logs. Technical reason: Header-based API authentication avoids exposing secrets in ordinary URL records. Verify by: Network logs show no credential in the request URL and authenticated calls still succeed. Deployment qualification: Follow the product-specific authentication header name and rotation requirements.

Incorrect Answers

B:

Read the documented Link response header and follow the next relation until it is absent. This instead targets the different case Parse Link header for next page. The described Bearer token separation from query string requirement specifically calls for Move the token into the authorized HTTP header and keep it out of query parameters and logs.

C:

Validate the notification, enqueue a durable job and return the required 2xx acknowledgement promptly. This instead targets the different case Acknowledge webhook quickly and queue work. The described Bearer token separation from query string requirement specifically calls for Move the token into the authorized HTTP header and keep it out of query parameters and logs.

D:

Select the documented RPC or action call for reboot rather than trying to update an unrelated GET resource with an invented field. This instead targets the different case RPC action versus REST resource semantics (A management SDK exposes rebootDevice(deviceId) as an action while a REST inventory API exposes /devices/{id} as a resource.). The described Bearer token separation from query string requirement specifically calls for Move the token into the authorized HTTP header and keep it out of query parameters and logs.

Question 237

After deployment, an engineer must prove the proposed solution works. A modern Meraki integration expects an API credential in the documented authentication header; a developer appends the token to URLs logged by proxies. Which observed result is the most direct acceptance evidence?

  1. The unwanted subscription no longer appears on list requests and duplicate events cease.
  2. A reboot task appears in the controller's operations history for the chosen device.
  3. Network logs show no credential in the request URL and authenticated calls still succeed.
  4. A simulated text/html response is rejected as unexpected content without misleading key errors.

Explanation

Correct Answer

C:

Network logs show no credential in the request URL and authenticated calls still succeed. Recommended implementation: Move the token into the authorized HTTP header and keep it out of query parameters and logs. Why the observation matters: Header-based API authentication avoids exposing secrets in ordinary URL records.

Incorrect Answers

A:

The unwanted subscription no longer appears on list requests and duplicate events cease. That observation could confirm DELETE an obsolete webhook subscription, not the current Bearer token separation from query string case. For this case, the decisive observation is: Network logs show no credential in the request URL and authenticated calls still succeed.

B:

A reboot task appears in the controller's operations history for the chosen device. That observation could confirm RPC action versus REST resource semantics, not the current Bearer token separation from query string case. For this case, the decisive observation is: Network logs show no credential in the request URL and authenticated calls still succeed.

D:

A simulated text/html response is rejected as unexpected content without misleading key errors. That observation could confirm Content-Type guards JSON parsing, not the current Bearer token separation from query string case. For this case, the decisive observation is: Network logs show no credential in the request URL and authenticated calls still succeed.

Question 238

A developer is explaining the underlying technical behavior. A modern Meraki integration expects an API credential in the documented authentication header; a developer appends the token to URLs logged by proxies. Which principle is most relevant to this case?

  1. A documented GET query parameter belongs in the URL rather than an arbitrary request body.
  2. Header-based API authentication avoids exposing secrets in ordinary URL records.
  3. Rate limiting constrains request frequency and 429 indicates throttling rather than a malformed endpoint.
  4. HTTP client timeouts bound resource occupancy during network or server stalls.

Explanation

Correct Answer

B:

Header-based API authentication avoids exposing secrets in ordinary URL records. This mechanism explains Bearer token separation from query string. Action: Move the token into the authorized HTTP header and keep it out of query parameters and logs. Expected confirmation: Network logs show no credential in the request URL and authenticated calls still succeed.

Incorrect Answers

A:

A documented GET query parameter belongs in the URL rather than an arbitrary request body. This relates to GET filtered devices using query parameters. In the current Bearer token separation from query string case the operative principle is: Header-based API authentication avoids exposing secrets in ordinary URL records.

C:

Rate limiting constrains request frequency and 429 indicates throttling rather than a malformed endpoint. This relates to Back off on API rate-limit response. In the current Bearer token separation from query string case the operative principle is: Header-based API authentication avoids exposing secrets in ordinary URL records.

D:

HTTP client timeouts bound resource occupancy during network or server stalls. This relates to Control timeouts and retry budget. In the current Bearer token separation from query string case the operative principle is: Header-based API authentication avoids exposing secrets in ordinary URL records.

Question 239

A team does not apply the necessary control or correction. A modern Meraki integration expects an API credential in the documented authentication header; a developer appends the token to URLs logged by proxies. Which resulting failure or risk is most directly relevant?

  1. Aggressive retries amplify throttling and may lead to temporary API blocks.
  2. Python's dict string uses single quotes and is not valid JSON serialization.
  3. Credentials in query strings may leak in browser history, referer logs and monitoring exports.
  4. Granting administrator rights for a single denied method violates least privilege.

Explanation

Correct Answer

C:

Credentials in query strings may leak in browser history, referer logs and monitoring exports. This is the direct exposure for Bearer token separation from query string. Mitigate with: Move the token into the authorized HTTP header and keep it out of query parameters and logs. Check success by: Network logs show no credential in the request URL and authenticated calls still succeed.

Incorrect Answers

A:

Aggressive retries amplify throttling and may lead to temporary API blocks. This risk occurs in the different Back off on API rate-limit response situation. For the given Bearer token separation from query string requirement, the directly relevant risk is: Credentials in query strings may leak in browser history, referer logs and monitoring exports.

B:

Python's dict string uses single quotes and is not valid JSON serialization. This risk occurs in the different Use requests.post json parameter situation. For the given Bearer token separation from query string requirement, the directly relevant risk is: Credentials in query strings may leak in browser history, referer logs and monitoring exports.

D:

Granting administrator rights for a single denied method violates least privilege. This risk occurs in the different 403 Forbidden despite valid authentication situation. For the given Bearer token separation from query string requirement, the directly relevant risk is: Credentials in query strings may leak in browser history, referer logs and monitoring exports.

Question 240

The initial implementation fails or does not meet the expected behavior. A modern Meraki integration expects an API credential in the documented authentication header; a developer appends the token to URLs logged by proxies. Which investigation should be prioritized to diagnose the problem?

  1. Inspect prepared request URL, response status and simulated timeout handling.
  2. Inspect request headers, raw payload bytes and accepted media types in API docs.
  3. Compare HTTP verb, required JSON schema and response status with the API reference.
  4. Inspect URL construction, header placement and redacted request traces.

Explanation

Correct Answer

D:

Inspect URL construction, header placement and redacted request traces. These are the relevant initial evidence checks for Bearer token separation from query string. Intended action: Move the token into the authorized HTTP header and keep it out of query parameters and logs. Expected success condition: Network logs show no credential in the request URL and authenticated calls still succeed.

Incorrect Answers

A:

Inspect prepared request URL, response status and simulated timeout handling. This investigation primarily applies to Use requests.get with params and timeout, not the current Bearer token separation from query string problem. Prioritize: Inspect URL construction, header placement and redacted request traces.

B:

Inspect request headers, raw payload bytes and accepted media types in API docs. This investigation primarily applies to 415 Unsupported Media Type on JSON endpoint, not the current Bearer token separation from query string problem. Prioritize: Inspect URL construction, header placement and redacted request traces.

C:

Compare HTTP verb, required JSON schema and response status with the API reference. This investigation primarily applies to POST creates an alarm subscription, not the current Bearer token separation from query string problem. Prioritize: Inspect URL construction, header placement and redacted request traces.

DevNet Associate (DEVASC) (200-901) Practice Tests

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