Cisco 200-901 Exam Dumps

Question 6 of 530

What is a benefit of test-driven development?

strict adherence to product requirements

faster releases that have minimal features

early customer involvement

increased code quality

Correct Answer: D

A key benefit of test-driven development is increased code quality. By writing tests before the actual production code, developers are able to identify and fix defects early in the development process, leading to cleaner, more reliable, and maintainable code. TDD also encourages better design and helps ensure that the code meets its requirements by verifying functionality through automated testing.

Question 7 of 530

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

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.

It provides tooling to automate application builds and infrastructure provisioning.

It allows multiple engineers to work against the same code and configuration files and manage differences and conflicts.

It provides a system to track User Stories and allocate to backlogs.

It allows developers to write effective unit tests.

Correct Answer: A, C

Using a version control system provides several advantages. Firstly, it allows for branching and merging, which means different tasks can be worked on independently before being merged into a main branch. This helps manage contributions from multiple developers and maintain code integrity. Secondly, it enables multiple engineers to collaborate on the same codebase simultaneously, effectively managing differences and conflicts through version control mechanisms.

Question 8 of 530

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

It supports tracking and comparison of changes in binary format files.

It allows new team members to access the current code and history.

It supports comparisons between revisions of source code files.

It provides wiki collaboration software for documentation.

It allows old versions of packaged applications to be hosted on the Internet.

Correct Answer: B, C

Version control software allows new team members to access the current code and the history of all changes made to it. This capability is crucial for collaborative development and onboarding new developers. Additionally, it supports comparisons between revisions of source code files, which is essential for tracking changes, debugging, and understanding the evolution of the codebase over time.

Question 9 of 530

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

checkout of code

merge of code

committing code

branching code

Correct Answer: B

Code review is performed before merging code. During the version control process, changes are typically made in separate branches. Once the changes are ready, a merge request or pull request is created, which initiates the code review process. The code must be reviewed and approved before it can be merged into the main branch or another integration branch. This ensures that the code being merged meets the project's standards and does not introduce defects.

Question 10 of 530

What is an advantage of a version control system?

facilitates resolving conflicts when merging code

ensures that unit tests are written

prevents over-writing code or configuration files

forces the practice of trunk-based development

Correct Answer: A

An advantage of a version control system is that it facilitates resolving conflicts when merging code. Version control systems allow multiple developers to work on the same codebase simultaneously by managing changes and integrating those changes cohesively. This enables developers to detect conflicts early and provides tools to resolve them, ensuring smooth collaboration. By tracking changes, version control systems also allow reversing modifications and understanding the history of a project, which are critical aspects for maintaining and developing software effectively.