200-901 Cisco Platforms and Development — 25 Questions

Question 1

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?

Choose an answer to begin — your selection is scored in the full session.

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 2

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 3

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.. Option D is correct because the Meraki Dashboard API uses cursor-based pagination, where the startingAfter parameter specifies the ID of the last item from the previous page so the next page begins immediately after it. Option E is correct because paginated API responses include an HTTP Link header containing the URL (with the appropriate cursor parameters) for retrieving the next page, allowing clients to follow pagination without manually constructing requests. The unmarked options do not belong: the API does not return a 'total' field showing the total count (A), the maximum items per page is 1000 rather than 10 (B), and perPage is optional with a default of 10, not required for all requests (C).

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 4

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 5

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

Accepted Answer

resource: 'rooms', event: 'created'. 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 6

An engineer is configuring IOS XE for RESTCONF. Which YANG module must be enabled to use RESTCONF?

Accepted Answer

restconf. RESTCONF is a standardized protocol (RFC 8040) that uses HTTP methods to access data defined in YANG modules. To enable RESTCONF on IOS XE, the 'restconf' module must be explicitly enabled in the configuration, typically via the 'restconf' global command. Without this module, the RESTCONF server will not start, and HTTP requests to the RESTCONF API will fail.

Answer

Cisco-IOS-XE-native

Answer

netconf-yang

Answer

nxapi

Question 7

A developer is exploring YANG models on yangcatalog.org. They want to find a standard model for interface configuration that is vendor-neutral. Which model should they look for?

Accepted Answer

oc-interfaces. OpenConfig models are vendor-neutral. oc-interfaces is the OpenConfig model for interfaces.

Answer

Cisco-NX-OS-device

Answer

ietf-interfaces

Answer

Cisco-IOS-XE-native

Question 8

A developer wants to use Cisco DNA Center to change the network configuration. Which TWO API categories provide capabilities to modify the network? (Choose two.)

Accepted Answer

Run your network. Option B, "Run your network," is correct because this Cisco DNA Center API category exposes operational commands and workflows that let applications execute actions against the network, including configuration-affecting operations. Option E, "Change your network," is correct because it is the API category explicitly intended for modifying network configuration, such as applying templates and provisioning changes through Cisco DNA Center. The remaining options do not belong: "Platform" (A) covers authentication, tokens, and system-level integration services rather than network modification; "Know your network" (C) provides discovery and inventory data; and "Monitor your network" (D) provides telemetry, health, and assurance data without changing device configuration.

Answer

Platform

Answer

Know your network

Answer

Monitor your network

Question 9

A developer is building an integration with Cisco Webex and needs to retrieve information about the authenticated user. Which TWO APIs can be used? (Choose two.)

Accepted Answer

GET /v1/people/me. Option C, GET /v1/people/me, is correct because the Webex People API exposes this endpoint specifically to return the profile of the currently authenticated user, identified by the access token, making it the canonical way to retrieve "me" information. Option D, GET /v1/people, is also correct because the People API's list endpoint can be queried (for example with an email or displayName parameter) to look up person records, including the authenticated user's own details, so it can serve the same retrieval purpose. Option A, GET /v1/rooms, is wrong because it lists Webex meeting rooms/spaces rather than user profile data. Option B, GET /v1/memberships, is wrong because it returns membership records linking people to rooms, not the authenticated user's identity. Option E, POST /v1/people, is wrong because it is a write operation for creating a new person, not for retrieving the authenticated user's information.

Answer

GET /v1/rooms

Answer

GET /v1/memberships

Answer

POST /v1/people

Question 10

A network engineer wants to retrieve a list of all network devices from Cisco DNA Center using the REST API. Which authentication method is required to obtain an access token?

Accepted Answer

Basic Authentication with username and password to obtain a token. Cisco DNA Center uses Basic Authentication to obtain a token by sending a POST request to /dna/system/api/v1/auth/token with a Basic Auth header. The returned token is then used in subsequent API calls.

Answer

OAuth 2.0 client credentials grant

Answer

API key in the X-Cisco-Meraki-API-Key header

Answer

Bearer token in the Authorization header directly with no initial authentication

Question 11

An engineer is configuring Cisco IOS XE for RESTCONF programmability. Which configuration is necessary to enable the RESTCONF API?

Accepted Answer

netconf-yang and restconf. RESTCONF requires the 'restconf' service to be enabled globally. Additionally, 'netconf-yang' is often enabled together, but 'restconf' is the key for RESTCONF.

Answer

ip scp server enable

Answer

ip http server and ip http secure-server

Answer

feature nxapi

Question 12

Which YANG model type is defined by industry standards and supported by multiple vendors, offering interoperability?

Accepted Answer

OpenConfig YANG models. OpenConfig models are vendor-neutral, community-driven YANG models that promote interoperability across different network devices.

Answer

MIB-based models

Answer

IETF YANG models

Answer

Cisco native YANG models

Question 13

In Cisco IOS XE, a network engineer wants to retrieve the hostname of a device using RESTCONF. Which URI and method should be used? Assume RESTCONF is enabled and the base URL is https://device/restconf.

Accepted Answer

GET /restconf/data/Cisco-IOS-XE-native:native/hostname. To retrieve the hostname via RESTCONF on IOS XE, you use GET on the data resource path that corresponds to the native YANG model: /restconf/data/Cisco-IOS-XE-native:native/hostname. The Cisco-IOS-XE-native module defines the 'native' container, and 'hostname' is a leaf within it. GET is the correct method for reading data.

Answer

GET /restconf/data/hostname

Answer

GET /restconf/data/Cisco-IOS-XE-interfaces:interfaces

Answer

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

Question 14

What authentication method is required to obtain a token from Cisco DNA Center's API?

Accepted Answer

Basic Authentication (username:password base64 encoded) in Authorization header. Cisco DNA Center's API uses Basic Authentication to obtain an authentication token. You send a POST request to the /dna/system/api/v1/auth/token endpoint with the username and password base64-encoded in the Authorization header (Basic <base64>). The response contains a token that is then used as a Bearer token for subsequent API calls. This two-step process is required because DNA Center does not support direct API key or OAuth 2.0 client credentials for token generation.

Answer

Bearer token in Authorization header

Answer

API key in header X-API-Key

Answer

OAuth 2.0 client credentials grant

Question 15

Which YANG model is commonly used as an open standard for interface configuration and is supported by many vendors?

Accepted Answer

openconfig-interfaces. OpenConfig models are vendor-neutral standard models. oc-interfaces is the OpenConfig interface model.

Answer

ietf-interfaces

Answer

cisco-routing

Answer

Cisco-IOS-XE-native

Question 16

A network automation engineer is using Cisco DNA Center APIs. Which TWO of the following are valid API categories? (Choose two.)

Accepted Answer

Know your network. The valid categories are 'Know your network' and 'Change your network'. 'Monitor your network' and 'Secure your network' are not official categories.

Answer

Monitor your network

Answer

Secure your network

Answer

Automate your network

Question 17

A network administrator is planning to use model-driven programmability on Cisco IOS XE devices. Which TWO are valid YANG model sources for configuration? (Choose two.)

Accepted Answer

Cisco native YANG models (e.g., Cisco-IOS-XE-native). Cisco native models and OpenConfig models are both valid. IETF models are also valid but not listed. The others are not YANG models.

Answer

NETCONF capabilities

Answer

CLI commands

Answer

SNMP MIBs

Question 18

An administrator wants to retrieve a list of all network devices from Cisco DNA Center using the REST API. Which authentication method is required to obtain the API token?

Accepted Answer

Basic Authentication with username and password. Cisco DNA Center uses Basic Authentication with username and password (Base64 encoded) in the Authorization header to obtain a token via POST /dna/system/api/v1/auth/token.

Answer

Bearer token from OAuth2

Answer

Digest Authentication

Answer

API key in X-Cisco-Meraki-API-Key header

Question 19

An engineer is exploring YANG models for network interfaces. They need a vendor-neutral model that can be used across multiple device types. Which YANG model should they use?

Accepted Answer

OpenConfig interfaces. OpenConfig interfaces is a vendor-neutral YANG model developed by the OpenConfig working group, which aims to provide standardized data models that work across multiple vendors and device types. Unlike vendor-specific models, OpenConfig models are designed to be implemented consistently on different platforms, enabling multi-vendor automation and management. Therefore, for a vendor-neutral model usable across multiple device types, OpenConfig interfaces is the correct choice.

Answer

ietf-interfaces

Answer

Cisco-NX-OS-device

Answer

Cisco-IOS-XE-native

Question 20

Which TWO statements about Cisco Meraki API pagination are correct? (Choose two.)

Accepted Answer

The startingAfter parameter specifies the ID of the last item to start after.. Option D is correct because Meraki's REST API uses cursor-based pagination, where the startingAfter parameter takes the ID of the last item on the current page so the next request returns the items that follow it. Option E is correct because Meraki responses include an HTTP Link header with rel="next", rel="prev", and rel="first" URLs that you follow to traverse pages. Option A is wrong because Meraki does support the perPage parameter to control how many items are returned per page (up to 1000 for many endpoints). Option B is wrong because Meraki does paginate large result sets, so a single call does not return all data. Option C is wrong because Meraki uses cursor-based pagination via startingAfter/endingBefore, not a numeric page parameter.

Answer

The perPage parameter is not supported.

Answer

Pagination is not required because all data is returned in one call.

Answer

Meraki uses page number parameter for pagination.