200-901 Cisco Platforms and Development — Timed 50 Questions

Question 1

A developer needs to retrieve a list of all network devices from Cisco DNA Center. Which API endpoint and HTTP method should be used?

Accepted Answer

GET /dna/intent/api/v1/network-device. The correct API to get the device list is GET /dna/intent/api/v1/network-device. Authentication is handled separately via POST /dna/system/api/v1/auth/token.

Answer

POST /dna/intent/api/v1/issues

Answer

POST /dna/system/api/v1/auth/token

Answer

GET /dna/intent/api/v1/topology/l2/{vlanID}

Question 2

An application uses the Meraki Dashboard API to fetch the list of networks for an organization. The API response includes a Link header with rel='next' pointing to the next page. Which pagination method is the API using?

Accepted Answer

LinkHeader-based pagination. Meraki supports LinkHeader-based pagination. The Link header with rel='next' indicates the next page URL.

Answer

Cursor-based pagination using startingAfter/endingBefore parameters

Answer

Offset-based pagination using page and perPage parameters

Answer

Token-based pagination using a nextPageToken parameter

Question 3

A developer wants to send a message to a specific room in Webex using the API. The developer already has the room ID. Which API call is correct?

Accepted Answer

POST /v1/messages with body { 'roomId': 'Y2lzY29zcGFyazovL3VzL1JPT00v...', 'text': 'Hello' }. To send a message to a room, POST /v1/messages is used with roomId and text in the body.

Answer

PUT /v1/messages with body { 'roomId': '...', 'text': 'Hello' }

Answer

POST /v1/rooms with body { 'title': 'New Room' }

Answer

GET /v1/messages with query parameter roomId='...'

Question 4

A network engineer is using Cisco IOS XE RESTCONF to retrieve the hostname of a device. The YANG module used is 'Cisco-IOS-XE-native'. Which URL path is correct?

Accepted Answer

GET /restconf/data/Cisco-IOS-XE-native:native/hostname. RESTCONF on IOS XE uses the path /restconf/data/ followed by the YANG path. The hostname is under native/hostname.

Answer

GET /restconf/data/Cisco-IOS-XE-native:hostname

Answer

GET /restconf/api/data/Cisco-IOS-XE-native:native/hostname

Answer

GET /restconf/operational/Cisco-IOS-XE-native:native/hostname

Question 5

When using the Meraki Dashboard API, what HTTP header is used to pass the API key?

Accepted Answer

X-Cisco-Meraki-API-Key: <key>. Meraki requires the API key in the X-Cisco-Meraki-API-Key header.

Answer

API-Key: <key>

Answer

Authorization: Bearer <key>

Answer

Meraki-API-Key: <key>

Question 6

A developer is automating network configuration using Cisco DNA Center. They want to deploy a configuration template to multiple devices. Which API category should they use?

Accepted Answer

Change your network. Template deployment falls under 'change your network' API category.

Answer

Platform

Answer

Run your network

Answer

Know your network

Question 7

An application sends many requests to the Meraki API and receives HTTP 429 errors. The response includes a 'Retry-After' header. What does this status code indicate?

Accepted Answer

The client has exceeded the rate limit. HTTP 429 means too many requests; rate limiting is in effect. Retry-After indicates the wait time.

Answer

The requested resource was not found

Answer

The server encountered an internal error

Answer

The API key is invalid

Question 8

A developer is using NX-API on a Cisco Nexus switch to execute CLI commands via JSON. Which endpoint and method should be used?

Accepted Answer

POST /ins with JSON body. NX-API uses POST /ins with JSON payload containing CLI commands.

Answer

GET /restconf/data/Cisco-NX-OS-device:cli

Answer

POST /api/cli with XML body

Answer

GET /ins?cmd=show version

Question 9

Which YANG model is an OpenConfig model commonly used for interface configuration?

Accepted Answer

openconfig-interfaces. OpenConfig models include oc-interfaces for interface configuration.

Answer

Cisco-IOS-XE-interfaces

Answer

ietf-interfaces

Answer

openconfig-routing-policy

Question 10

A developer wants to create a Webex webhook that triggers when a new message is posted in any room the bot is in. Which resource event should they subscribe to?

Accepted Answer

resource: 'messages', event: 'created'. To trigger on new messages, subscribe to 'messages' resource with 'created' event.

Answer

resource: 'messages', event: 'updated'

Answer

resource: 'rooms', event: 'created'

Answer

resource: 'memberships', event: 'created'

Question 11

A network administrator wants to use EEM on an IOS XE device to send a syslog message whenever a specific CLI command is entered. Which event detector should be used?

Accepted Answer

event cli match. EEM can trigger on CLI command entry using 'cli match' event.

Answer

event syslog pattern

Answer

event interface

Answer

event timer

Question 12

An application needs to authenticate to Cisco DNA Center. Which authentication method is used?

Accepted Answer

Basic Auth over HTTPS to obtain a token. DNA Center uses Basic Auth to obtain a token via POST /dna/system/api/v1/auth/token.

Answer

API key in X-Cisco-DNA-Center-API-Key header

Answer

OAuth2 with client credentials grant

Answer

Bearer token in Authorization header with no prior step

Question 13

A developer is using the Meraki Dashboard API to manage networks. Which two statements about pagination are correct?

Accepted Answer

The startingAfter parameter is used for cursor-based pagination.. Meraki supports both LinkHeader and cursor-based pagination via startingAfter/endingBefore parameters.

Answer

Paginated responses include a 'total' field showing the total count.

Answer

The API returns a maximum of 10 items per page.

Answer

The perPage parameter is required for all requests.

Question 14

A network engineer is planning to use model-driven programmability with YANG models. Which three statements about YANG models are correct?

Accepted Answer

pyang is a tool that can be used to explore YANG models.. A is correct because pyang is a command-line tool that validates and converts YANG models into various formats (e.g., tree, UML, YIN), enabling engineers to explore the structure and semantics of YANG modules. It is widely used in network automation workflows to inspect model hierarchies and dependencies before implementing NETCONF or RESTCONF configurations.

Answer

OpenConfig models are vendor-specific.

Answer

YANG models are only used with NETCONF, not RESTCONF.

Question 15

A developer is integrating with Cisco Webex Teams. Which two resources can trigger a webhook?

Accepted Answer

resource: 'rooms', event: 'created'. Option B is correct because the Cisco Webex Teams API supports webhooks for the 'rooms' resource with the 'created' event, which triggers when a new room (space) is created. This is a documented and valid webhook combination that allows developers to react to room creation events in real-time.

Answer

resource: 'memberships', event: 'deleted'

Answer

resource: 'people', event: 'created'

Answer

resource: 'teams', event: 'updated'

Question 16

A network engineer needs to retrieve a list of all network devices from Cisco DNA Center. Which API endpoint should they use?

Accepted Answer

GET /dna/intent/api/v1/network-device. The correct endpoint to retrieve the device list in Cisco DNA Center is GET /dna/intent/api/v1/network-device.

Answer

POST /dna/system/api/v1/auth/token

Answer

GET /dna/intent/api/v1/issues

Answer

GET /dna/intent/api/v1/topology/l2/{vlanID}

Question 17

An administrator wants to receive real-time notifications when a new message is posted to a Webex room. Which Webex API resource should be used to configure this?

Accepted Answer

Webhooks API. Webhooks allow you to register for events like message.created. The webhook resource is used for this purpose.

Answer

People API

Answer

Messages API

Answer

Rooms API

Question 18

A developer is using the Meraki Dashboard API to retrieve a list of clients for a network. After a successful request, the response includes a Link header with rel="next" pointing to the next page. What does this indicate about the API's pagination?

Accepted Answer

The API uses Link header pagination and the next page can be retrieved by following the URL in the Link header.. Meraki API uses Link headers for pagination, and a rel="next" link indicates there are additional pages to fetch.

Answer

The API uses page-based pagination with page and perPage parameters.

Answer

The API uses offset-based pagination and the next page can be retrieved by incrementing an offset parameter.

Answer

The API uses cursor-based pagination with startingAfter/endingBefore parameters.

Question 19

An engineer needs to authenticate to the Cisco DNA Center API to obtain a token. What is the correct authentication method and endpoint?

Accepted Answer

POST /dna/system/api/v1/auth/token with Basic auth header. Cisco DNA Center uses Basic authentication (with username:password) to POST to /dna/system/api/v1/auth/token to obtain a token.

Answer

POST /dna/system/api/v1/token with Bearer auth

Answer

GET /dna/intent/api/v1/auth/token with Basic auth header

Answer

POST /dna/system/api/v1/auth/token with API key in header

Question 20

A developer wants to send a message to a Webex room using the API. Which HTTP method and endpoint should they use?

Accepted Answer

POST /v1/messages. To send a message, use POST to /v1/messages with roomId or toPersonEmail.

Answer

POST /v1/rooms

Answer

PUT /v1/messages

Answer

GET /v1/messages