DevNet Associate (DEVASC) Exam Questions

Here you have the best Cisco 200-901 practice exam questions.

Some things you may want to keep in mind about this practice exam questions:

You have 530 total questions to study from
Each page has 5 questions, making a total of 106 pages
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This questions were last updated on September 10, 2024

Question 1 of 530

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

Test-driven development (TDD) is a software development methodology that involves writing a test before writing the actual code. This ensures that the code is tested incrementally and helps in refining and improving it through continuous refactoring. By following these steps, TDD facilitates the creation of clean, efficient, and bug-free code. Therefore, enabling code refactoring and writing a test before writing code are two key concepts that describe TDD.

Question 2 of 530

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

In test-driven development (TDD), the process involves writing tests before writing the actual code. Once the test is written and fails (because the functionality is not yet implemented), the developer writes the minimum amount of code required for the test to pass. After the test passes, the code is then refactored to ensure it is clean and efficient while still passing the tests. The task of refactoring code that is covered by existing tests aligns with the principles of TDD, as it involves refining the code after it has already been tested to ensure it meets all requirements and maintains readability and structure without changing its behavior.

Question 3 of 530

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

In test-driven development (TDD), the first development task is to write a failing test case for the desired function. This initial test case is intended to define the function's expected behavior before any actual implementation code is written, ensuring that the code development follows the requirements specified by the test. Only after writing this failing test and seeing it fail does the developer proceed to write the minimum amount of code necessary to make the test pass.

Question 4 of 530

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

In test-driven development (TDD), two recognized green bar patterns are 'triangulate' and 'fake it'. 'Triangulate' refers to the method of using multiple tests to drive the design of the code, while 'fake it' is about implementing simple code that makes the test pass in the simplest way possible. These patterns help ensure that the code evolves incrementally and maintains a clear focus on passing tests while gradually improving the implementation.

Question 5 of 530

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

In the test-driven development model, after a test fails, the code is changed. This is because the primary purpose of test-driven development is to write the minimum amount of code necessary to pass the failing test. The process involves writing a test that initially fails, then writing the code to make the test pass, followed by refactoring the code if necessary. Therefore, the correct answer is that the code is changed.