[2020.6] Tips for successfully passing the Juniper JN0-420 exam

How do I successfully pass the Juniper JNCIS JN0-420 exam?
ExamvceSoftware updates Juniper Free Exam Dumps Blog throughout the year! “Automation and DevOps, Specialist (JNCIS-DevOps)” JN0-420 exam. You can find the free JN0-420 pdf, JN0-420 practice question online test, and our recommended https://www.leads4pass.com/jn0-420.html brand site in ExamvceSoftware! Easy access to JN0-420 exam dumps!

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Latest Juniper JN0-420 exam pdf free download

[PDF Q1-Q13] Free Juniper JN0-420 pdf dumps download from Google Drive: https://drive.google.com/file/d/1Gm50IE7BsIFZY7MGmW-74OwxAtgxEkCO/

JNCIS-DevOps Exam Objectives (Exam: JN0-420): https://www.juniper.net/uk/en/training/certification/resources/jncis-devops/#gsc.tab=0

Latest Updates Juniper JN0-420 Exam Practice Questions and Answers


What are two message types that compose the message layer of the Juniper NETCONF implementation? (Choose

Correct Answer: CD


You are asked by your manager to automatically switch traffic from the primary link to the backup link on the MX Series
device at the branch site whenever latency is above 300 ms over a 5-minute period. Which type of Junos script would
you use in this scenario?
C. Commit
D. Event

Correct Answer: D

Reference: https://www.juniper.net/documentation/en_US/junos/topics/concept/junos-script-automation-overview.html


Your organization is creating a custom YANG module. You are asked to create a leaf node called timeout with a data
type of duration. In this scenario, what is the appropriate syntax for this leaf node?

juniper JN0-420 q3
juniper JN0-420 q3-1

A. Option A
B. Option B
C. Option C
D. Option D

Correct Answer: D


Which messaging protocol do JET service APIs use to interface with the Junos OS?
C. RabbitMQ

Correct Answer: B

Reference: https://www.juniper.net/documentation/en_US/jet1.0/information-products/pathway-pages/jet-developerguide.html


By default, Python event scripts and SNMP scripts configured on a Junos device execute as which user?
A. wheel
B. snmpd
C. nobody
D. root

Correct Answer: C


Click the Exhibit button. Exhibit:

examvcesoftware juniper JN0-420 q6

The Ansible playbook shown in the exhibit is executed against a set of Junos network devices. Each Junos device is
configured with a user account in the super-user login class. The user account uses SSH-key-based authentication with
a passphrase of user123.
What is the result of executing this playbook against the Junos network devices?
A. The playbook executes but fails with a “ConnectAuthError” due to the missing passphrase argument to the
junos_get_facts module
B. The playbook fails due to a YAML syntax error.
C. The playbook executes and prints the version of Junos running on each network device as the value of
D. The playbook executes and prints “VARIABLE IS NOT DEFINED!” as the value response.facts.version

Correct Answer: C


Click the Exhibit button. Exhibit:

examvcesoftware jn0-420 q7

An automation developer is using command-line scripting and wants to briefly survey NETCONF capabilities before
running a new task. Referring to the exhibit, how does the automation developer end the current NETCONF session and
go to the next one?
A. Use the command.
B. Use the quit command
C. Use the logout command
D. Use the command.

Correct Answer: D

Reference: https://www.juniper.net/documentation/en_US/junos/topics/task/operational/netconf-session-closing.html


Click the Exhibit button. Exhibit: You need to programmatically extract interface information using PyEZ from your MX
Series devise. You log in and use the show interfaces terse | display XML RPC command and see the information shown
in the exhibit. What is the correct PyEZ syntax to accomplish this task?

examvcesoftware jn0-420 q8

A. dev.rpc.get-interface-information()
B. dev.rpc.get_interface_information(terse=True)
C. dev.rpc.get-interface-information(terse=True)
D. dev.rpc.get_interface_information()

Correct Answer: B


With which three processes does the JET service process communicate? (Choose three)
A. snmpd
B. ancpd
C. cosd
D. mgd
E. rpd

Correct Answer: ADE


Click the Exhibit button. Exhibit:

examvcesoftware jn0-420 q10

Referring to the exhibit, how would you solve this issue?
A. Enable trace options under the NETCONF configuration hierarchy
B. Enable protocol-version v1 under the SSH configuration hierarchy
C. Enable outbound-ssh with services netconf under the SSH configuration hierarchy
D. Enable ssh under the NETCONF configuration hierarchy

Correct Answer: C

Reference: https://www.juniper.net/documentation/en_US/junos/topics/topic-map/netconf-ssh-connection.html


What are two format distinctions to know when using YAML? (Choose two)
A. white space indentation sensitive
B. tab indentation not allowed
C. tab indentation allowed
D. white space indentation insensitive

Correct Answer: AB

Because YAML is white-space sensitive and indentation is significant (not allowed), you should always use spaces
rather than tabs when creating playbooks. In YAML, items preceded by a hyphen (-) are considered list items, and the
key: value notation represents a hash. Reference: https://www.juniper.net/documentation/en_US/junosansible1.0/topics/task/program/junos-ansible-playbooks-creating-executing.html


A customer has a control machine with a default Ansible installation. During the execution of an Ansible module against a
Junos devise, the Ansible control machine generates the msg: unable to connect to router1.example.com:
ConnectRefusedError (router1.example.com) error.
What is the cause of this error?
A. router1.example.com was not defined in /etc/hosts on the control machine
B. Ansible cannot connect to the device through NETCONF
C. router1.example.com was not defined in /etc/ansible/inventory/hosts on the control machine
D. Ansible cannot authenticate to the device

Correct Answer: B

Reference: https://www.juniper.net/documentation/en_US/junos-ansible1.0/information-products/pathway-pages/junosansible.pdf

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