Free 200-901 DEVASC Dump

Question #1

Which two concepts describe test-driven development? (Choose two.)

• A. User acceptance testers develop the test requirements.
• B. It enables code refactoring.
• C. Tests are created when code is ready for release.
• D. Implementation is driven by incremental testing of release candidates.
• E. Write a test before writing code.

Correct Answer: BE

Community vote distribution

BE (92%)

Question #2

Which task is performed because the test-driven development approach is being used?

• A. creating test scenarios based on continuous development
• B. writing code without committing any coding violations
• C. refactoring code that is covered by existing tests
• D. testing existing software before developing new code

Correct Answer: C

Reference:

https://www.guru99.com/test-driven-development.html

Community vote distribution

C (100%)

Question #3

What is the first development task in test-driven development?

• A. Write code that implements a desired function.
• B. Write a failing test case for a desired function.
• C. Reverse engineer the code for a desired function.
• D. Write a passing test case for existing code.

Correct Answer: B

Reference:

Test Driven Development (TDD): Example Walkthrough

Community vote distribution

B (100%)

Question #4

In test-driven development, what are two of the green bar patterns? (Choose two.)

• A. another test
• B. break
• C. triangulate
• D. starter test
• E. fake it

Correct Answer: CE

Reference:

https://www.cs.uic.edu/~i442/Patterns%20for%20TDD.pdf

Community vote distribution

CE (100%)

Question #5

In the test-driven development model, what is changed after a test fails?

• A. schedule
• B. project requirements
• C. code
• D. test

Correct Answer: C

Reference:

https://www.guru99.com/test-driven-development.html#:~:text=In%20simple%20terms%2C%20test%20cases,code%20simple%20and%20bug%

2Dfree

Community vote distribution

C (100%)

Question #6

What is a benefit of test-driven development?

• A. strict adherence to product requirements
• B. faster releases that have minimal features
• C. early customer involvement
• D. increased code quality

Correct Answer: A

Community vote distribution

D (69%)

A (31%)

Question #7

Which two statements describe the advantages of using a version control system? (Choose two.)

• A. It allows for branching and merging so that different tasks are worked on in isolation before they are merged into a feature or master branch.
• B. It provides tooling to automate application builds and infrastructure provisioning.
• C. It allows multiple engineers to work against the same code and configuration files and manage differences and conflicts.
• D. It provides a system to track User Stories and allocate to backlogs.
• E. It allows developers to write effective unit tests.

Correct Answer: AC

Community vote distribution

AC (100%)

Question #8

What are two advantages of version control software? (Choose two.)

• A. It supports tracking and comparison of changes in binary format files.
• B. It allows new team members to access the current code and history.
• C. It supports comparisons between revisions of source code files.
• D. It provides wiki collaboration software for documentation.
• E. It allows old versions of packaged applications to be hosted on the Internet.

Correct Answer: BC

Community vote distribution

BC (88%)

 

Question #9

Before which process is code review performed when version control is used?

• A. checkout of code
• B. merge of code
• C. committing code
• D. branching code

Correct Answer: B

Community vote distribution

B (100%)

Question #10

What is an advantage of a version control system?

• A. facilitates resolving conflicts when merging code
• B. ensures that unit tests are written
• C. prevents over-writing code or configuration files
• D. forces the practice of trunk-based development

Correct Answer: A

Community vote distribution

A (100%)

Question #11

Refer to the exhibit.

Which Python data structure does my_json contain?

• A. map
• B. list
• C. json
• D. dict

Correct Answer: D

Reference:

https://stackoverflow.com/questions/34764979/loading-python-string-with-u-as-json?noredirect=1&lq=1

Community vote distribution

D (100%)

Question #12

When a Cisco IOS XE networking device is configured using RESTCONF, what is the default data-encoding method?

• A. JSON
• B. YAML
• C. XML
• D. x-form-encoding

Correct Answer: A

Reference:

https://www.cisco.com/c/en/us/td/docs/routers/csr1000/software/restapi/restapi/RESTAPIintro.pdf

Community vote distribution

C (60%)

A (40%)

Question #13

Refer to the exhibit.

Which JSON is equivalent to the XML-encoded data?

A.

B.

C.

D.

Correct Answer: B

Reference:

https://www.guru99.com/json-vs-xml-difference.html

Question #14

FILL BLANK –

Fill in the blanks to complete the Python script to request a service ticket using the APIC-EM REST API for the user `devnetuser`. import requests import json controller = ‘devnetapi.cisco.com/sandbox/apic_em’ url = `https://` + controller + `api/va/ticket` payload = {‘username’: ‘_________________’, ‘password’: ‘370940885’} header = {‘Content-type’: ‘application.json’} response = _______________________.post(url, data=json.dumps(payload), \ headers= ______________________, verify=False) r_json = response.json() print(r_json) ticket = r_json[`response`][`serviceTicket`] print(ticket)

Correct Answer: See explanation below.

devnetuser

requests

header

Reference:

https://developer.cisco.com/docs/apic-em/#!hello-world

Question #15

Which two statements about JSON and XML are true? (Choose two.)

• A. The syntax of JSON contains tags, elements, and attributes.
• B. XML objects are collections of key-value pairs.
• C. JSON objects are collections of key-value pairs.
• D. JSON arrays are an unordered set of key-value pairs.
• E. The syntax of XML contains tags, elements, and attributes.

Correct Answer: CE

Community vote distribution

CE (100%)

Question #16

Which statement describes the benefit of using functions in programming?

• A. Functions ensure that a developer understands the inner logic contained before using them as part of a script or application.
• B. Functions create the implementation of secret and encrypted algorithms.
• C. Functions allow problems to be split into simpler, smaller groups, and reduce code repetition, which makes the code easier to read.
• D. Functions store mutable values within a script or application.

Correct Answer: C

Community vote distribution

C (100%)

Question #17

Refer to the exhibit.

The output of a unified diff when comparing two versions of a Python script is shown. Which two `single_request_timeout()` functions are defined in fish.py and cat.py? (Choose two.)

A.

B.

C.

D.

E.

Correct Answer: BC

Question #18

What is a benefit of organizing code into modules?

• A. reduces the length of code
• B. enables code to be multifunctional
• C. enables the reuse of code
• D. improves overall performance

Correct Answer: C

Community vote distribution

C (100%)

Question #19

What is a benefit of organizing code into modules?

• A. enables the code to be broken down into layers
• B. improves collaboration of the development team
• C. makes it easier to deal with large and complex systems
• D. enables the inclusion of more programming languages in the code

Correct Answer: C

Community vote distribution

B (100%)

Question #20

What is the Git command to delete a local branch named `experiment` without a warning?

• A. git branch ג€”rm experiment
• B. git branch ג€”n experiment
• C. git branch ג€”f experiment
• D. git branch ג€”D experiment

Correct Answer: D

Reference:

https://www.atlassian.com/git/tutorials/using-branches

Community vote distribution

D (100%)

Question #21

What is the outcome of executing this command?

git clone ssh:/john@example.com/path/to/my-project.git

• A. creates a local copy of a repository called ג€my-projectג€
• B. initiates a new Git repository called ג€my-projectג€
• C. creates a copy of a branch called ג€my-projectג€
• D. creates a new branch called ג€my-projectג€

Correct Answer: A

Reference:

https://www.atlassian.com/git/tutorials/setting-up-a-repository/git-clone

Community vote distribution

A (100%)

Question #22

Which action does the Git command git merge allow the developer to perform?

• A. Combine multiple sequences of commits into one unified history
• B. Push changes to the remote repository
• C. Create, list, rename, and delete branches
• D. Switch between branches

Correct Answer: A

Reference:

https://www.atlassian.com/git/tutorials/using-branches/git-merge

Community vote distribution

A (100%)

Question #23

How does a developer create and switch to a new branch called `my-bug-fix` to develop a product fix?

• A. git checkout -b my-bug-fix
• B. git branch -b my-bug-fix
• C. git branch my-bug-fix
• D. git checkout my-bug-fix

Correct Answer: A

Community vote distribution

A (100%)

Question #24

DRAG DROP –

Drag and drop the Git commands from the left onto the right that add modified local files to a remote repository. Not all options are used.

Select and Place:

Correct Answer: 

Question #25

A developer needs to prepare the file README.md in the working tree for the next commit operation using Git. Which command needs to be used to accomplish this?

• A. git -a README.md
• B. git add README.md
• C. git add README.md staging
• D. git commit README.md

Correct Answer: B

Reference:

https://teamtreehouse.com/community/committing-the-readmemd-file-to-repository

Community vote distribution

B (100%)

Question #26

A developer is reviewing a code that was written by a colleague. It runs fine, but there are many lines of code to do a seemingly simple task repeatedly. Which action organizes the code?

• A. Refactor the code by removing any unnecessary tests.
• B. Reverse engineer and rewrite the code logic.
• C. Using functions, rewrite any pieces of code that are repeated.
• D. Modify the code to use loops.

Correct Answer: C

Community vote distribution

C (67%)

D (33%)

Question #27

Which principle is a value from the manifesto for Agile software development?

• A. processes and tools over teams and interactions
• B. detailed documentation over working software
• C. adhering to a plan over responding to requirements
• D. customer collaboration over contract negotiation

Correct Answer: D

Reference:

https://www.cisco.com/c/dam/global/en_hk/solutions/collaboration/files/agile_product_development.pdf

Community vote distribution

D (100%)

Question #28

Which advantage does the agile process offer compared to waterfall software development?

• A. to add or update features with incremental delivery
• B. to view the full scope of end-to-end work
• C. to have each phase end before the next begins
• D. to fix any issues at the end of the development cycle

Correct Answer: A

Community vote distribution

A (100%)

Question #29

How do XML and JSON compare regarding functionality?

• A. XML provides more support for mapping data structures into host languages than JSON.
• B. XML provides more human readability than JSON.
• C. JSON provides less support for data types than XML.
• D. JSON natively supports arrays and XML does not natively support arrays.

Correct Answer: D

Community vote distribution

B (56%)

D (44%)

Question #30

What are two principles of an infrastructure as code environment? (Choose two.)

• A. Components are coupled, and definitions must be deployed for the environment to function.
• B. Redeployments cause varying environment definitions.
• C. Environments must be provisioned consistently using the same inputs.
• D. Service overlap is encouraged to cater for unique environment needs.
• E. Complete complex systems must be able to be built from reusable infrastructure definitions.

Correct Answer: CE

Community vote distribution

CE (100%)

Question #31

Which two encoding formats do YANG interfaces support? (Choose two.)

• A. XML
• B. JSON
• C. XHTML
• D. BER
• E. plain text

Correct 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

Community vote distribution

AB (100%)

Question #32

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[‘items’][‘host’][‘value’]
• B. data[‘items’][1][‘host’][‘value’]
• C. data[‘items’][0][‘host’][‘value’]
• D. data[‘items’][‘host’][1]

Correct Answer: C

Community vote distribution

C (100%)

Question #33

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.

Correct Answer: A

Reference:

https://community.cisco.com/t5/cisco-digital-network/how-can-i-make-this-script-to-run/td-p/3882782

Community vote distribution

D (85%)

A (15%)

Question #34

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.

Correct Answer: D

Community vote distribution

D (100%)

Question #35

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.

Correct Answer: B

Community vote distribution

B (80%)

C (20%)

Question #36

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

Correct Answer: D

Community vote distribution

D (100%)

Question #37

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

Correct Answer: A

Community vote distribution

B (100%)

Question #38

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

Correct Answer: B

Community vote distribution

B (100%)

Question #39

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

Correct Answer: A

Community vote distribution

C (100%)