Cisco Cisco Certified DevNet Professional 350-901 Questions & Answers

• Question 121:

  An engineer needs to automate the configuration on a Cisco NX-OS switch. The solution must meet these requirements:

  Ansible is used The transport protocol is encrypted Support for Asynchronous requests.

  Which two access mechanisms must be used? (Choose two.)

  A. SNMP Version 2c

  B. NETCONF

  C. NX-API

  D. HTTPS

  E. JSON-RPC

  Correct Answer: BD

• Question 122:

  Refer to the exhibit.

  

  A developer has created a Python script that retrieves information about the deployment of Cisco wireless access points using REST API. Which two code snippets must be added to the blank in the code to print the value of the userid key instead of printing the full JSON response? (Choose two.)

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  E. Option E

  Correct Answer: BD

• Question 123:

  An application is made up of multiple microservices, each communicating via APIs. One service is beginning to be a bottleneck for the application because it can take a lot of time to complete requests. An engineer tried adding additional instances of this service behind the load balancer, but it did not have any effect. Which application design change must be implemented m this scenario?

  A. Move from synchronous to asynchronous interactions with the service and implement a message queue.

  B. Deploy an API gateway to centralize all inbound communication requests and offload authentication

  C. Vendor all dependencies into the service that is causing delays to remove external dependency checks.

  D. Leverage serverless architecture instead of containers to gain the advantage of event driven APIs.

  Correct Answer: A

• Question 124:

  What securely stores and encrypts the API keys and tokens that are used for an application deployment?

  A. ITSM

  B. Artifactory

  C. GitHub

  D. Vault

  Correct Answer: D

• Question 125:

  Refer to the exhibit.

  

  Which type of python dependency file is shown?

  A. setup.py

  B. TOML

  C. packages

  D. requirements.txt

  Correct Answer: B

• Question 126:

  Refer to the exhibit.

  

  An architect wrote an application to collect device information from the Cisco Meraki Dashboard API. Every time a network change occurs the application collects information and records new endpoint MAC addresses. The application stopped working after the locations and network equipment of a competitor were acquired. Which application approach must be applied to reduce latency and rate limiting?

  A. MOS scoring system before collecting information

  B. leaky faucet algorithm for fault categorizing

  C. error handling to check for reachability first

  D. webhooks to trigger updates

  Correct Answer: C

• Question 127:

  Refer to the exhibit. A developer wants to automatically deploy infrastructure for a containerized application. A .gitlab-ci.yml file must describe a pipeline that builds a container based on a supplied Dockerfile and executes an Ansible playbook on the configured container. What must be added where the code S missing to complete the script?

  

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: D

• Question 128:

  A team is developing a cloud-native application for network monitoring and management of various devices. An increased growth rate of users is expected. The solution must be easily managed and meet these requirements:

  able to use dependencies easy disposability flexible configuration

  Which application design approach must be used?

  A. waterfall model

  B. 12-factor app framework

  C. object-oriented programming

  D. agile software development

  Correct Answer: B

  Explanation: This framework is designed to provide a consistent set of practices and principles to ensure applications can be easily deployed and managed in the cloud. It utilizes a microservices architecture which allows applications to be broken up into smaller, more manageable components. In addition, the 12-factor App Framework makes use of dependencies, flexible configuration and disposable services, making it an ideal choice for this type of application.

• Question 129:

  Refer to the exhibit.

  

  Cisco IOS XE switches are used across the entire network and the description that is filed for all interfaces must be configured. Which code snippet must be placed in the blank in the script to leverage RESTCONF to query all the devices in the device list for the interfaces that are present?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: A

• Question 130:

  Where must the data be encrypted to ensure end-to-end encryption when using an API?

  A. on the device that consumes the API

  B. on the source device before transmission

  C. on the end device after a request is received

  D. on the server that stores the data

  Correct Answer: A