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IT Certifications · 300-635 DCNAUTO

Cisco Automating Cisco Data Center Networking Solutions Exam Practice Test

The Cisco Automating Cisco Data Center Networking Solutions Exam practice page focuses on software-driven work with data center networks. The available questions sample skills such as representing fabric topology, interacting with controller APIs, handling events, and applying configuration changes through automation. These concepts connect programming practices with reliable operation of network devices and services.

Exam overview

Exam providerCisco
Exam code300-635 DCNAUTO
CategoryIT Certifications

About the Cisco Automating Cisco Data Center Networking Solutions Exam

Data center automation requires translating network intent into changes that can be validated, deployed, and observed. Practice scenarios address API behavior, including selecting HTTP methods, interpreting response content types, and using documented schemas to understand controller resources. They also touch on event-driven workflows, topology modeling with graphs, and time synchronization for correlating device and controller events. Secure implementation involves controlling access to deployment endpoints and keeping untrusted input from becoming executable shell content. For multi-device changes, validation helps catch errors before deployment, while code review supports controlled changes to shared automation. Together, these skills reflect decisions an engineer makes when building scripts and services that interact with data center infrastructure.

Sample Practice Questions

Review a selection from this exam's published US Practice Tests practice bank.

Question 1

A data-center fabric automation service needs to represent switches, links, and their relationships so it can calculate paths between endpoints. Which data structure is a natural fit for this topology?

  1. AA graph with devices as vertices and links as edges
  2. BA stack ordered by device creation time
  3. CA flat list of interface descriptions
  4. DA queue ordered by link speed
Show answerCorrect answer: A

A graph directly models entities and the connections between them. Graph algorithms can then be used for reachability and path calculations.

Question 2

Why might a network controller expose a webhook for configuration-change events?

  1. ATo let the controller notify a subscribed system when an event occurs, instead of requiring constant polling
  2. BTo replace all authentication requirements for API clients
  3. CTo guarantee that every event is delivered exactly once under all conditions
  4. DTo convert configuration data into encrypted form automatically
Show answerCorrect answer: A

A webhook is a mechanism for sending event notifications to a configured recipient. It can reduce repeated polling, though reliable consumers should still account for retries, duplicates, and delivery failures.

Question 3

A network automation service runs in containers across multiple hosts and must use the same time reference when correlating events from devices and controllers. Which practice is most appropriate?

  1. ASynchronize system clocks using a trusted time service such as NTP
  2. BSet each host clock manually once and never check it
  3. CUse container startup time as the timestamp for every event
  4. DInfer time ordering from device names
Show answerCorrect answer: A

Clock synchronization helps timestamps from separate systems be comparable and makes event correlation more reliable. NTP is a commonly used protocol for synchronizing clocks.

Question 4

Which HTTP method is generally appropriate for retrieving a resource without intending to modify it?

  1. AGET
  2. BPOST
  3. CPATCH
  4. DDELETE
Show answerCorrect answer: A

GET is conventionally used to retrieve a representation of a resource. POST, PATCH, and DELETE are commonly associated with submitting, partially modifying, or removing resources, respectively.

Question 5

A network automation service must prevent an untrusted input value from being interpreted as part of a shell command. Which practice is the safest general choice?

  1. ABuild a command string by concatenating the input
  2. BUse an argument-list interface and validate the input against expected values
  3. CBase64-encode the input and execute it as a command
  4. DRemove spaces from the input and assume it is safe
Show answerCorrect answer: B

Passing arguments as a list avoids shell interpretation in common process APIs, and validating values against expected constraints further limits risk. String concatenation and superficial transformations do not reliably prevent command injection.

Question 6

A network automation workflow needs to apply a change to several devices. Why is it useful to validate the generated configuration before deployment?

  1. AValidation can identify formatting or policy errors before they affect devices
  2. BValidation guarantees that every device is reachable
  3. CValidation automatically rolls back unrelated changes
  4. DValidation removes the need to test the workflow
Show answerCorrect answer: A

Pre-deployment validation can catch issues such as malformed configuration, missing required values, or policy violations before the change is applied. It does not establish device reachability or replace testing and operational safeguards.

Question 7

An automation client receives an API response whose content type is not JSON, although the workflow expected JSON. What is a robust client behavior?

  1. AAttempt JSON parsing unconditionally and ignore any parsing failure
  2. BInspect the response status and content type, then handle unexpected formats as an explicit error with useful diagnostics
  3. CTreat the response body as a valid empty object
  4. DRetry indefinitely until the response becomes JSON
Show answerCorrect answer: B

Checking status and content type before parsing makes response handling more reliable and helps distinguish API errors, proxy responses, and unexpected formats. Diagnostics should avoid exposing secrets or sensitive payload data.

How to use this practice test

The free US Practice Tests practice bank contains 50 questions for this exam. Start a session with up to 20 randomly selected questions, then use the displayed results to identify which areas—such as API handling, topology models, security controls, or deployment validation—need closer review.

Preparation tips

  • Practice mapping switches and links to graph structures, then reason through how a path can be found between two endpoints.
  • Compare common HTTP methods and inspect API examples for expected status codes, response formats, and resource schemas.
  • Build small client-side checks for unexpected content types, malformed responses, and untrusted values before data reaches a command or deployment workflow.
  • Trace a multi-device change from generated configuration through validation, review, deployment, and event-based monitoring.
Official sourceOfficial exam page ↗