DevNet Associate (DEVASC) v1.0
Question 1
Which two encoding formats do YANG interfaces support? (Choose two.)
- A. XML
- B. JSON
- C. XHTML
- D. BER
- E. plain text
Answer : AB
Reference:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/prog/configuration/171/b_171_programmability_cg/model_driven_telemetry.html
Question 2
Refer to the exhibit.
The JSON data in the exhibit has been parsed and stored into a variable `data`. What returns the value `172.16.0.11`?
- A. data[ג€˜itemsג€™][ג€˜hostג€™][ג€˜valueג€™]
- B. data[ג€˜itemsג€™][1][ג€˜hostג€™][ג€˜valueג€™]
- C. data[ג€˜itemsג€™][0][ג€˜hostג€™][ג€˜valueג€™]
- D. data[ג€˜itemsג€™][ג€˜hostג€™][1]
Answer : C
Question 3
Refer to the exhibit.
What does the Python function do?
- A. It returns HTTP Basic Authentication.
- B. It returns DNAC user and password.
- C. It reads a token from a local JSON file and posts the token to the DNAC URL.
- D. It returns an authorization token.
Answer : A
Reference:
https://community.cisco.com/t5/cisco-digital-network/how-can-i-make-this-script-to-run/td-p/3882782
Question 4
Package updates from a local server fail to download. However, the same updates work when a much slower external repository is used. Why are local updates failing?
- A. The server is running out of disk space.
- B. The Internet connection is too slow.
- C. The Internet is down at the moment, which causes the local server to not be able to respond.
- D. The update utility is trying to use a proxy to access the internal resource.
Answer : D
Question 5
What is a functionality of the Waterfall method as compared to the Agile method for software development?
- A. Waterfall increases agility to implement faster while Agile promotes reliability.
- B. A phase begins after the previous phase has ended in Waterfall while Agile phases run in parallel.
- C. Customers get feedback during the process in Waterfall while they can see the result at the end in Agile.
- D. Requirements can be updated in Waterfall while in Agile it should be gathered in the beginning.
Answer : B
Question 6
What is a benefit of using functions in the code for the development process?
- A. better user experience in the end product
- B. improves code performance
- C. easier to compile the code
- D. faster code development
Answer : D
Question 7
What is the difference between YAML and JSON data structure?
- A. YAML uses spaces; JSON uses parentheses
- B. YAML uses indentation; JSON uses brackets and braces
- C. YAML uses brackets and braces; JSON uses indentation
- D. YAML uses parentheses; JSON uses spaces
Answer : A
Question 8
A developer is working on a feature for a new application. The changes in the existing branch named 'feat00304' must be integrated into a single commit with the current working primary branch named 'prodapp411926287'. Which git command must be used?
- A. git rebase --merge feat00304
- B. git merge --squash feat00304
- C. git push --rebase feat00304
- D. git checkout --squash feat00304
Answer : B
Question 9
A file that already exists in a local repository is updated. Which command must be executed to ensure that the changes in the file are included in the next Git commit?
- A. git update
- B. git merge
- C. git add
- D. git rebase
Answer : A
Question 10
Into which type of Python data structure should common data formats be parsed?
- A. sequence
- B. set
- C. dictionary
- D. list
Answer : C
Question 11
Several teams at a company are developing a new CRM solution to track customer interactions with a goal of improving customer satisfaction and driving higher revenue. The proposed solution contains these components:
* MySQL database that stores data about customers
* HTML5 and JavaScript UI that runs on Apache
* REST API written in Python
What are two advantages of applying the MVC design pattern to the development of the solution? (Choose two.)
- A. to enable multiple views of the same data to be presented to different groups of users
- B. to provide separation between the view and the model by ensuring that all logic is separated out into the controller
- C. to ensure data consistency, which requires that changes to the view are also made to the model
- D. to ensure that only one instance of the data model can be created
- E. to provide only a single view of the data to ensure consistency
Answer : BD
Question 12
Refer to the exhibit. Which XML snippet has interface information that conforms to the YANG model?
A.
B.
C.
D.
Answer : A
Question 13
What is a benefit of version control?
- A. prevents two users from working on the same file
- B. keeps track of all changes to the files
- C. prevents the sharing of files
- D. keeps the list of data types used in the files
Answer : B
Question 14
Refer to the exhibit. What does the command marked (2) do when it is run?
- A. It duplicates the ג€testג€ branch.
- B. It deletes the ג€testג€ branch only if a new branch is created.
- C. It deletes the ג€testג€ branch.
- D. It does not delete the branch until it is merged.
Answer : C
Question 15
What is a comparison of YAML and JSON?
- A. YAML has a more consistent approach to representing data compared to JSON.
- B. JSON does not support comments and YAML does.
- C. YAML is a more verbose data structure compared to JSON.
- D. JSON has more common usage in configuration management tools compared to YAML.
Answer : B
Reference:
https://stackoverflow.com/questions/244777/can-comments-be-used-in-json