Cisco Cisco Certified DevNet Associate 200-901 Questions & Answers

• Question 391:

  Refer to the exhibit. A developer cannot reach the web application behind an NGINX load balancer. The developer sends a request to an application FQDN with cURL but gets an HTTP 502 response. Which action solves the problem?

  

  A. Fix errors in the server configuration, which is behind the load balancer.

  B. Bring up the load balancer to the active state.

  C. Fix errors in the cURL request sent by the client.

  D. Change the default gateway on the load balancer to an active one.

  Correct Answer: A

  The HyperText Transfer Protocol (HTTP) 502 Bad Gateway server error response code indicates that the server, while acting as a gateway or proxy, received an invalid response from the upstream server. https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/502#:~:text=The%20HyperText%20Transfer%20Protocol%20(HTTP,response%20from%20the%20upstream%20server

• Question 392:

  Refer to the exhibit. A developer just finished testing a Python script and wants to save the list of packages and versions installed on the current machine. The developer must make sure that it will not cause any issues if tested on another device due to different library versions. Which line of code needs to be placed on the snippet where the code is missing?

  

  A. pip freeze 2> requirements.txt

  B. pip freeze > requirements.txt

  C. pip freeze => requirements.txt

  D. pip freeze | requirements.txt

  Correct Answer: B

  pip freeze requirements.txt ile ilgili sel sonucu The most common command is pip freeze > requirements. txt , which records an environment's current package list into requirements. txt. If you want to install the dependencies in a virtual environment, create and activate that environment first, then use the Install from requirements.

• Question 393:

  A developer is attempting to retrieve all the messages from a Cisco Webex space. The server responds by sending the first 1,000 messages. The developer must make additional requests to retrieve the rest of the messages. Which API constraint is described in this scenario?

  A. payload limiting

  B. throttling

  C. pagination

  D. rate limiting

  Correct Answer: C

  https://developer.atlassian.com/server/confluence/pagination-in-the-rest-api/

• Question 394:

  What is the main purpose of a code review?

  A. To provide the technical lead visibility into all code.

  B. To identify and review errors with the team.

  C. To ensure that all code is checked in simultaneously.

  D. To detect logical errors.

  Correct Answer: B

• Question 395:

  How does a synchronous API request differ from an asynchronous API request?

  A. clients receive responses with a task id for further processing

  B. clients subscribe to a webhook for operation results

  C. clients are able to access the results immediately

  D. clients poll for the status of the execution of operations

  Correct Answer: C

• Question 396:

  A new application is being developed that must be hardware independent. The application includes an administrative component which is accessed using a Windows desktop GUI. Installation and management of the environment must be fully automated. Which application deployment type meets the requirements?

  A. bare metal

  B. virtual Python environment

  C. container

  D. virtual machine

  Correct Answer: C

• Question 397:

  What is used in JSON to represent a Python Tuple?

  A. Object

  B. Array

  C. Dict

  D. Collection

  Correct Answer: B

  JSON has only two datatypes objects and arrays tuples should be arrays

  https://www.tutorialspoint.com/How-can-I-represent-python-tuple-in-JSON-format#:~:text=Use%20the%20json.,a%20tuple%20as%20a%20parameter.

• Question 398:

  How is a branch called "my-bug-fix" started to develop a fix needed in a product?

  A. git branch -b my-bug-fix

  B. git checkout -b my-bug-fix

  C. git checkout my-bug-fix

  D. git branch my-bug-fix

  Correct Answer: B

• Question 399:

  Which tool is used to block all traffic to the domain by using a single API call?

  A. Cisco ISE

  B. Cisco Firepower

  C. Cisco AMP

  D. Cisco Umbrella

  Correct Answer: D

  KeyWord = domain

  Umbrella blocks access to malicious domains, URLs, IPs, and files. The system looks at the nature of any DNS requests and takes an action based on its threat intelligence, which is a large-scale repository of historical data about threats. In turn, Umbrella is building models that classify requests so that you build on its threat intelligence. These requests can be safe and allowed, malicious and blocked, or deemed "risky" and sent to a proxy for deeper inspection.

• Question 400:

  What is a benefit of a model-driven approach for infrastructure automation?

  A. enforces the generation of all automation scripts through the modeling environment

  B. provides a small learning curve and helps system administrators with limited coding experience

  C. ensures that system administrators gain a good understanding of coding and expand their experience and capabilities

  D. enables a user to understand a declarative language to translate the model into an actionable script

  Correct Answer: A