DevNet Associate (Version 1.0) – DevNet Associate Module 4 Exam Answers

Last Updated on June 14, 2021 by InfraExam

DevNet Associate (Version 1.0) – DevNet Associate Module 4 Exam Answers

1. In which situation would a synchronous API be used?

   • when the client is not required to take action
   • when the original API request or data from the request is delayed
   • when data is being retrieved from a database
   • when a server is not part of the process

2. Which API architectural style uses an XML-based messaging protocol to communicate between applications?

   • SOAP
   • XML-RPC
   • REST
   • NFS

3. Which SOAP message root element defines the XML document as a SOAP message?

   • Header
   • Meta tag
   • Body
   • Envelope

4. What is the meaning of the term flow as it relates to the OAuth 2.0 authorization framework?

   • It is the number of requests contained in the token bucket.
   • It is the sequence of data exchanged between a REST API request and a response.
   • It is a process for an API request to send authentication credentials to a web service.
   • It is a process for an API user to obtain an access token from the authorization server.

5. Refer to the exhibit. A network administrator is using a Python script to test a REST API request. The traceback message indicates that there is an error in the URI. What is a possible issue?

   

   • The SSL certificate is invalid.
   • The protocol is wrong.
   • The destination host address is wrong.
   • The query component is missing.

6. A network engineer is learning about Rest APIs. When executing a particular API, the server responds with curl. How is this information useful?

   • Curl shows the URL used in the API request.
   • Curl shows how to access the content displayed in the response body using curl.
   • Curl shows the information the API returned from the server.
   • Curl shows the retrieved information in JSON format.

7. A client is sending a REST API request to a web server. The request includes the need for data compression. Which three values are acceptable for the Accept-Encoding request header? (Choose three.)

   • xz
   • zip
   • br
   • *
   • gzip
   • tar

8. Which characteristic of the SOAP architecture specifies communication between all similar and dissimilar application types?

   • interface uniformity
   • neutrality
   • independence
   • extensibility

9. Refer to the exhibit. A network administrator is using a Python script to send a REST API request. What is the purpose of the line of code resp = requests.get(url, verify = False) ?

   

   • It bypasses the certificate validation check.
   • It skips the URL verification step and tests the resource path.
   • It tests the function of the Python requests library.
   • It omits the sending URL in the response.

10. What is an architectural constraint to which a true RESTful API web service must adhere?

    • It uses HTTPS to transport data.
    • It operates in a stateless way.
    • It operates as a cloud service.
    • It must operate along with a DNS server.

11. What is a characteristic of a RESTful API?

    • It supports a secure data transmission between a remote user and an enterprise network.
    • It uses HTTP methods to gather and manipulate data.
    • It facilitates the configuration changes from a network controller to end devices.
    • It is a southbound API.

12. Match the RESTful API method to CRUD function.

    

13. What are two purposes for using rate limits on public and unrestricted APIs? (Choose two.)

    • to avoid a server overloading from too many requests at the same time
    • to limit the number of authorization requests per API call
    • to limit the number of passwords that a client can have in making API requests
    • to ensure a client uses a multifactor authentication mechanism
    • to provide better service and response time to all users
      

      Answers Explanation & Hints: Using an API rate limit is a way for a web service to control the number of requests a user or application can make per defined unit of time and it is considered a best practice for public and unrestricted APIs. Some benefits of using rate limits include the following: Avoid a server overload from too many requests at once. Provide better service and response time to all users. Protect against a denial of service (DoS) attack.

14. Which HTTP response status code indicates that the user is not authenticated to access the site?

    • 201
    • 400
    • 401
    • 403
    • 404

15. In the REST API request URI example http://example.com/update/person?id=42&email=person%40example.com , which term describes the component example.com ?

    • path
    • authority
    • scheme
    • query

16. Which type of credential information is used for the bearer authentication in REST APIs?

    • a username and password set by the client
    • an MD5 hash string generated by the client application
    • a password encoded using Base64
    • a string generated by an authentication server