200-901 Cisco Platforms and Development Practice Test 9 — 15 Questions

Question 1

Which command enables the NX-API feature on a Cisco NX-OS device?

Accepted Answer

feature nxapi. The global configuration command 'feature nxapi' enables the NX-API interface.

Answer

restconf enable

Answer

nxapi enable

Answer

enable nxapi

Question 2

A developer needs 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 the room ID and message body.

Answer

GET /v1/messages

Answer

PUT /v1/messages

Answer

DELETE /v1/messages

Question 3

A network engineer wants to automate a configuration change on a Cisco IOS XE device when a specific syslog message appears. Which tool should they use?

Accepted Answer

EEM applet configured to match the syslog pattern and execute CLI commands. EEM (Embedded Event Manager) is a built-in Cisco IOS XE feature that allows the device to react to local events, including syslog messages. An EEM applet can be configured with an event syslog pattern to match a specific syslog message and an action to execute CLI commands, enabling automated configuration changes directly on the device. This is the most direct and native way to trigger a configuration change based on a syslog message without external dependencies.

Answer

RESTCONF with a Python script polling the device

Answer

SNMP trap receiver

Answer

NETCONF with a YANG-based notification subscription

Question 4

A developer is using the Cisco DNA Center API and receives a token. How is this token typically used in subsequent API requests?

Accepted Answer

In the X-Auth-Token header. The Cisco DNA Center API uses token-based authentication where the token is passed in the X-Auth-Token HTTP header for subsequent requests. This is the standard method specified in the Cisco DNA Center API documentation, ensuring the server can validate the session without relying on cookies or query parameters.

Answer

As a query parameter named token

Answer

In the request body

Answer

In the Authorization header as Bearer <token>

Question 5

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

Accepted Answer

openconfig-interfaces. OpenConfig is a vendor-neutral, community-driven data model standard for network configuration and state. The 'openconfig-interfaces' YANG model is the OpenConfig model specifically designed for interface configuration, providing a consistent, model-driven approach across different network operating systems. Option D is correct because it directly names the OpenConfig model for interfaces.

Answer

oc-yang-interfaces

Answer

ietf-interfaces

Answer

Cisco-IOS-XE-interfaces

Question 6

Which THREE of the following are valid event triggers for an EEM applet on Cisco IOS XE? (Choose THREE.)

Accepted Answer

timer. EEM applets support timer-based event triggers, such as absolute time, countdown, or watchdog timers, allowing automation of actions at specified intervals or after a delay. This is a core EEM feature defined in Cisco IOS XE for scheduling tasks without external input.

Answer

snmp trap

Answer

http request

Question 7

A developer wants to retrieve the list of network devices from Cisco DNA Center. Which API endpoint should be used?

Accepted Answer

GET /dna/intent/api/v1/network-device. The GET /dna/intent/api/v1/network-device endpoint returns a list of network devices managed by DNA Center.

Answer

GET /dna/intent/api/v1/site

Answer

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

Answer

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

Question 8

When making API calls to Cisco Meraki Dashboard, what header must be included for authentication?

Accepted Answer

X-Cisco-Meraki-API-Key: <key>. Cisco Meraki Dashboard API uses a custom header for authentication rather than standard HTTP authentication schemes. The header `X-Cisco-Meraki-API-Key` must be included with the API key as its value. This is explicitly documented in the Meraki API reference and is required for all API requests to authenticate the caller.

Answer

Authorization: Basic <base64>

Answer

Authorization: Bearer <token>

Answer

Api-Key: <key>

Question 9

A developer is using the Meraki Dashboard API to list all networks in an organization. The response includes a Link header with rel="next". What does this indicate?

Accepted Answer

There are additional data pages to retrieve.. Meraki uses Link headers for pagination; the next link indicates there are more pages of results to fetch.

Answer

The organization ID is invalid.

Answer

The API version is deprecated and should be updated.

Answer

The request is rate-limited and needs to wait.

Question 10

A developer needs to send a message to a specific room in Webex using the API. What is the correct endpoint and required body parameter for the room destination?

Accepted Answer

POST /v1/messages with roomId parameter. To send a message to a Webex room, use POST /v1/messages with the roomId parameter to specify the target room.

Answer

POST /v1/messages with toPersonEmail parameter

Answer

POST /v1/memberships with roomId

Answer

POST /v1/rooms with message text

Question 11

When using RESTCONF on Cisco IOS XE, which URL retrieves the hostname configuration?

Accepted Answer

GET /restconf/data/Cisco-IOS-XE-native:native/hostname. The native YANG model Cisco-IOS-XE-native contains the hostname under /native/hostname.

Answer

GET /restconf/data/ietf-interfaces:interfaces

Answer

GET /restconf/data/openconfig-interfaces:interfaces

Answer

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

Question 12

An engineer wants to trigger an EEM applet when a specific syslog message appears. Which event detector should be used?

Accepted Answer

event syslog pattern. EEM's syslog event detector triggers on syslog messages matching a pattern.

Answer

event timer cron

Answer

event interface

Answer

event cli pattern

Question 13

Which NX-OS API method allows sending CLI commands in JSON format without enabling any additional features?

Accepted Answer

NX-API method 'cli' with JSON encoding. The NX-API 'cli' method with JSON encoding allows an administrator to send standard NX-OS CLI commands wrapped in a JSON payload over HTTP/HTTPS to the NX-API endpoint, and it works without enabling additional model-driven features like RESTCONF or NETCONF. It is the simplest NX-API method because it reuses existing CLI syntax rather than requiring YANG models. This is why it is the correct answer for sending CLI commands in JSON without extra feature enablement.

Answer

RESTCONF with YANG data

Answer

SNMP with MIB objects

Answer

NETCONF with XML data

Question 14

Which tool is used to explore and validate YANG models?

Accepted Answer

pyang. pyang is a Python-based tool for validating and converting YANG models.

Answer

Postman

Answer

cURL

Answer

YANGman

Question 15

Which three components are required to set up a Webex webhook for message creation events? (Choose three.)

Accepted Answer

Resource type (e.g., "messages"). A is correct because every Webex webhook must specify a resource type to define which API resource triggers the webhook. For message creation events, the resource type must be "messages" to indicate that the webhook listens for changes to message resources. Without this, the webhook cannot know which data model to monitor.

Answer

Room ID to filter messages

Answer

API access token as a query parameter