Free Practice Questions for Cisco 200-901 Exam

Simplifying the wording: Webhook enables the app to ( push or receive real time) . The clients Webhooks enable applications to receive real-time data by providing a mechanism for one application to send data to another as soon as an event happens. This is done through HTTP callbacks, where an event in the source system triggers an HTTP POST request to a predefined URL in the destination system. This allows the destination system to process the data immediately, ensuring real-time updates.

A code review process involves evaluating and examining another developer's code to identify potential issues, bugs, and improvements before the code is merged into the main codebase. It helps in maintaining code quality and catching errors early in the development cycle.

Error Detection: Code reviews help detect and eliminate common mistakes and bugs that developers might overlook.

Knowledge Sharing: They promote knowledge sharing and learning among team members.

Code Quality: Ensures that the code adheres to the coding standards and best practices.

Option D is correct as the primary benefit of code reviews is to eliminate common mistakes during development.

NETCONF (Network Configuration Protocol) operates over TCP port 830. It is a protocol defined for managing network devices and configurations. NETCONF provides mechanisms to install, manipulate, and delete the configuration of network devices. It uses XML as its data encoding format and allows for easy automation of network configuration tasks.

References:

Cisco DevNet Associate Certification Guide

RFC 6241 - Network Configuration Protocol (NETCONF)

The packet capture shows that the packets are arriving at Server B and that the server responds, indicating that Server B is reachable and the API service is running. However, since the developer cannot access the API, the most likely cause is that the return traffic on port 443 (HTTPS) is being blocked on the incoming interface of Firewall B. This means that although Server B is responding, the responses are not getting back to the developer's client because they are being blocked by the firewall.

In Ansible, when using the netconf_config module to automate configuration tasks that include unique interface variables for each device, the variables should be defined in individual YAML files within the host_vars directory. This directory contains host-specific variable files named after each host, allowing Ansible to load the appropriate variables for each device during playbook execution.

References:

Ansible Documentation - Variable precedence

Cisco DevNet Associate Certification Guide

GIT PUSH

To start a CI/CD pipeline and run automated tests after modifying the code in a cloned repository, the appropriate command is git push. When a developer pushes the changes to the remote repository, it triggers the CI/CD pipeline configured in the repository. Here are the steps:

Clone the repository from GitLab.

Make the necessary code modifications.

Use git commit to commit the changes locally.

Use git push to push the committed changes to the remote repository.

Pushing the changes to the remote repository initiates the CI/CD pipeline, which typically includes steps like building the application, running tests, and deploying the application if tests pass.

References:

Cisco DevNet Associate Certification Guide

GitLab CI/CD Documentation

Comprehensive Detailed Step by Step Explanation with ReferencesA sandbox environment is an isolated testing environment that mimics a live network. It allows engineers and developers to run scripts and test code without affecting the production network. Cisco provides sandboxes through the DevNet portal, which are always available for testing and experimentation with network automation and programmability. Using a sandbox helps monitor the live execution of code in a controlled and safe manner, ensuring that any potential issues do not impact the actual network.

References:

Cisco DevNet Sandboxes

Cisco DevNet Associate Certification Guide

The --no-ff option in the git merge command ensures that a merge commit is always created, even when a fast-forward merge is possible. This is useful for keeping a clear history of feature branches being merged into the main branch.

Fast Forward Merge: By default, Git performs a fast-forward merge if there are no diverging changes. This can result in a linear commit history without a separate merge commit.

Using --no-ff: The --no-ff option forces Git to create a merge commit, preserving the context that a feature branch was merged into the main branch, which is crucial for record-keeping and audit trails.

References:

Git Merge Documentation: Git Merge

Nonlinear development in a version control system like Git allows developers to work on different parts of the project independently and simultaneously. This approach provides several advantages:

Independent Workflows: Developers can work on different features or bug fixes without interfering with each other's work.

Parallel Development: Multiple branches enable parallel development, where teams can develop, test, and merge features separately.

Efficient Collaboration: Changes can be reviewed, tested, and merged systematically, improving collaboration among remote teams.

References:

Git and Nonlinear Development: Understanding Git Workflow

DNS (Domain Name System) is the technology responsible for matching a name to an IP address of an application running on a host. When a user types a domain name into a browser, DNS translates that domain name into the corresponding IP address, enabling the user's device to connect to the server hosting the application.

References:

Cisco DevNet Documentation - DNS

Cisco DevNet Associate Certification Guide