Red Hat EX457 Exam Dumps (V8.02) Are Online to Upgrade Your Skills and Enhance Your knowledge in Red Hat Ansible

1. A team uses Automation Controller to manage a multi-environment network. Their Ansible playbooks are stored in a Git repository with different branches for each environment.

- The `develop` branch is for testing new features.

- The `main` branch represents stable, tested code for production.

How should an administrator configure Automation Controller to ensure the stability of the production environment and prevent accidental changes? (Select all that apply.)

2. A playbook task needs to provide a default value for a variable if it is not defined in the inventory. The task should configure an NTP server using the `ntp_peer` variable, but if `ntp_peer` is not defined for a host, it should use the IP address `10.1.1.254`.

Which Jinja2 expression correctly implements this logic?

3. What is the primary purpose of a "Machine" credential type within Ansible Automation Controller?

4. In the context of Ansible network automation, what are "facts"?

5. An automation engineer attempts to push their local commits to a shared remote repository using `git push`. The command fails with the following output.

To https://github.com/example/network-playbooks.git

! [rejected] main -> main (fetch first)

error: failed to push some refs to 'https://github.com/example/network-playbooks.git'

hint: Updates were rejected because the remote contains work that you do

hint: not have locally. This is usually caused by another repository pushing

hint: to the same ref. You may want to first integrate the remote changes

hint: (e.g., 'git pull ...') before pushing again.

What is the most likely cause of this error, and what is the correct command to resolve it before attempting to push again? (Choose 2.)

6. What is the primary advantage of using a Source Code Management (SCM) system like Git to manage playbooks within Ansible Automation Controller?

7. 1.An administrator is creating a Job Template in Automation Controller to run a playbook against a set of Arista switches. The playbook requires SSH access with a specific username and password to configure the switches.

Which credential type must be created and associated with the Job Template for the playbook to authenticate successfully to the Arista switches?

8. An automation engineer needs to start working with an Ansible project that is managed in a central Git repository. This is their first time working with this project on their local control node.

Which Git command is the essential first step to create a local working copy of the remote repository?

9. An administrator is creating a new Project in Automation Controller to pull playbooks from a public GitHub repository.

Review the following snippet of the Project configuration:

```

Name: New Network Project

Organization: Default

Source Control Type: Git

Source Control URL: https://github.com/ansible/ansible-tower-samples.git

Source Control Branch/Tag/Commit: main

Source Control Credential: [Not Set]

...

```

What will be the result of this Project configuration for a public, non-authenticated GitHub repository?

10. An automation team manages their Ansible playbooks in a central Git repository. To maintain code quality and prevent errors in the production environment, they want to enforce a policy where all changes are reviewed by a peer before being integrated into the `main` branch.

Which of the following Git practices should the team adopt to enforce this policy effectively? (Select all that apply.)

11. A team follows the Git-flow workflow, where all feature development happens in `feature/*` branches, which are then merged into a `develop` branch for integration testing. Only after the `develop` branch passes all tests is it merged into the `main` branch for production releases.

An administrator needs to model this workflow in Automation Controller. They want to ensure that an update and deployment of the `main` branch can only be triggered after the `develop` branch's project sync has succeeded.

Which Automation Controller feature is best suited to implement this conditional, multi-step Git and deployment process?

12. A playbook needs to apply a configuration to a list of VLAN IDs. The initial list is provided as a string from an external system.

"vlan_string": "10,20,30, 40 ,50"

The `ios_vlans` module requires a list of integers, not a string.

Which sequence of filters will correctly transform `vlan_string` into the required format `[10, 20, 30, 40, 50]`?

13. A job launch in Automation Controller fails immediately with an "Authentication failed" error when trying to connect to a Juniper router. The administrator verifies that the Job Template is correctly configured with an Inventory and a Project. They also check the assigned credential and see that it is of type "Source Control" and contains the SSH key for their GitLab repository.

What is the cause of this job failure?

14. An automation engineer is examining the log file from an `ansible-navigator` run to look for specific failures.

Review the following log file snippet from `/home/student/playbook_run.log`:

[INFO] Running playbook: configure_routers.yml

[ERROR] Task failed on host rtr-01: could not connect to device

[INFO] Task 'Gather Facts' completed on rtr-02

[WARNING] Module 'legacy_facts' is deprecated.

[ERROR] Task failed on host rtr-03: authentication failure

Which command will display only the lines containing the case-sensitive string "ERROR"?

15. After running a task with the `cisco.ios.ios_facts` module, the following data structure is returned.

"ansible_facts": {

"ansible_net_gather_subset": [

"all"

],

"ansible_net_hostname": "csr1000v",

"ansible_net_interfaces": {

"GigabitEthernet1": {

"bandwidth": 1000000,

"description": null,

"ipv4": [

{

"address": "192.168.1.101",

"subnet": "24"

}

],

"macaddress": "0a:de:3f:74:e7:00",

"mediatype": "Virtual",

"mtu": 1500,

"operstatus": "up",

"type": "CSR vNIC"

}

},

"ansible_net_model": "CSR1000V",

"ansible_net_serialnum": "9K8ZW5V7M4S",

"ansible_net_version": "16.09.04"

}

Which Jinja2 expression will correctly extract the serial number of the device?