Automation and DevOps Specialist

Here you have the best Juniper JN0-420 practice exam questions

You have 65 total questions to study from
Each page has 5 questions, making a total of 13 pages
You can navigate through the pages using the buttons at the bottom
This questions were last updated on October 14, 2025
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Question 1 of 65

Which command is valid for accessing a Junos device using the RESTful API on the default port?

curl http://192.168.1.1/rpc/get-interface-information?interface-name=1o0 –u "user:pass123"

curl http://user:pass123@192.168.1.1/rpc/get-interface-information?interface-name=1o0

curl –u "user:pass123" http://192.168.1.1:80/rpc/get-interface-information?interface-name=1o0

curl http://user:pass123@192.168.1.1.:3000/rpc/get-interface-information?interface-name=1o0

Correct Answer: C

Question 2 of 65

You need to reset all Junos systems in your lab to their factory-default state and then push a new configuration to the device.
Which two Ansible modules would your playbook use to accomplish this task? (Choose two)

junos_system_services

junos_zeroize

junos_get_facts

junos_install_config

Correct Answer: B, D

Question 3 of 65

Click the Exhibit button.
Exhibit:
Ansible playbook:
Exam JN0-420: Question 3 - Image 1

The r0 device is currently in a factory-default state. The console connection of r0 is reachable using Telnet on TCP port 555 of the console_server host.
Referring to the exhibit, which statement is true?

The device does not require configuration changes for the playbook to run successfully

The Telnet service must be configured for the playbook to run successfully

A password for the root user must be configured for the playbook to run successfully

The NETCONF service must be configured for the playbook to run successfully

Correct Answer: D

Question 4 of 65

Click the Exhibit button.
Exhibit:
Exam JN0-420: Question 4 - Image 1

You are using RubyEZ to interact with a Junos device: however, you are not successfully connecting to the device.
Referring to the exhibit, what is the problem?

Argument passed to Netconf:: SSH.new statement must be referenced as variables

Netconf::SSH.new statement only expects an IP address of the target device

Netconf::SSH.new statement arguments must be hashes

A Junos::Ez::Provider statement is missing before the Netconf::SSH. New statement

Correct Answer: A

Question 5 of 65

Click the Exhibit button.
Exhibit:
Exam JN0-420: Question 5 - Image 1

How would you test the configuration snippet shown in the exhibit?

Use the root@router% logger SSHD_LOGIN_FAILED command

Use the root@router% logger -e SSHD_LOGIN_FAILED command

Use the root@router% test SSHD_LOGIN_FAILED command

Use the root@router% event SSHD_LOGIN_FAILED command

Correct Answer: B