[Update Apr 2022] Latest JNCIS-DevOps JN0-420 dumps exam material
Latest JNCIS-DevOps JN0-420 dumps exam material has 65 exam questions and answers, verified by Juniper-certified experts to be true and valid, candidates download JN0-420 dumps with PDF and VCE: https://www.leads4pass.com/jn0-420.html
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Read the latest JNCIS-DevOps JN0-420 dumps exam questions and answers online
| Number of exam questions | Exam name | From | Release time |
| 15 | Automation and DevOps, Specialist (JNCIS-DevOps) | Lead4Pass | Apr 14, 2022 |
New Question 1:
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)
A. junos_system_services
B. junos_zeroize
C. junos_get_facts
D. junos_install_config
Correct Answer: BD
References: https://www.juniper.net/documentation/en_US/junos-ansible1.0/topics/example/junos-ansible-playbooks-device-zeroize.html https://www.juniper.net/documentation/en_US/junos-ansible1.0/topics/example/junos-ansible-playbooks-device-configuring.html
New Question 2:
Click the Exhibit button.
Exhibit:
Ansible playbook:
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?
A. The device does not require configuration changes for the playbook to run successfully
B. The Telnet service must be configured for the playbook to run successfully
C. A password for the root user must be configured for the playbook to run successfully
D. The NETCONF service must be configured for the playbook to run successfully
Correct Answer: D
Reference: http://docs.ansible.com/ansible/latest/junos_facts_module.html
New Question 3:
Click the Exhibit button. Exhibit:
Where would the Python code shown in the exhibit be used?
A. a commit script
B. an op script
C. an event script
D. an SNMP script
Correct Answer: D
New Question 4:
A customer has a control machine with a default Ansible installation. During the execution of an Ansible module against a Junos device, 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
New Question 5:
Which statement describes the relationship between YANG and NETCONF?
A. YANG is the programming language used to generate base classes to develop the NETCONF protocol
B. NETCONF models XML data used to program YANG modules
C. YANG models the state and configuration data manipulated by the NETCONF protocol
D. NETCONF is the programming language used to create the state and configuration data manipulated by YANG
Correct Answer: C
Reference: https://tools.ietf.org/html/rfc6020
New Question 6:
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?
A.Op
B. SNMP
C. Commit
D. Event
Correct Answer: D
New Question 7:
In SLAX, what is the difference between the jcs:invoke () and the jcs:execute () functions?
A. RPCs called by jcs:execute () are executed within an existing connection
B. RPCs called by jcs:invoke () are executed within an existing connection
C. RPCs called by jcs:invoke () are not executed until the conclusion of the script
D. RPCs called by jcs:execute () are not executed until the conclusion of the script
Correct Answer: A
New Question 8:
You want to enable an unsigned Python op script named inventory.py that will be stored on a local Junos device. Which two commands are needed to accomplish this task? (Choose two)
A. set system scripts op allow-url-for-python
B. set system scripts op file inventory.py
C. set system scripts op no-allow-url
D. set system scripts language python
Correct Answer: BD
New Question 9:
Click the Exhibit button. Exhibit:
Referring to the exhibit, what is the type of the myConfig variable on line 17 of the Python script?
A. template
B. dictionary
C. string
D. list
Correct Answer: A
New Question 10:
Which statement is true about a Junos ephemeral configuration database?
A. It can be used to trigger a commit script
B. It can be used to reduce commit time
C. It can be used to archive previous versions of the ephemeral configuration
D. It can be used to validate configuration data semantics
Correct Answer: B
New Question 11:
Which two automation frameworks are agentless when managing Junos devices? (Choose two)
A. SaltStack
B. Ansible
C. Puppet
D. Chef
Correct Answer: AB
New Question 12:
You are asked to write an application that interacts directly with the internal APIs belonging to rpd. Which statement is true in this scenario?
A. You must write the application using the XML APIs
B. You must write the application using the REST APIs
C. You must write the application using the JET APIs
D. You must write the application using the YANG APIs
Correct Answer: C
New Question 13:
You want to push a configuration onto a Junos device without using NETCONF. Which two will accomplish this task? (Choose two)
A. ZTP
B. Ansible
C. JET
D. JSNAPy
Correct Answer: AC
New Question 14:
Which two primary processes are used by Juniper devices for on-box or off-box automation? (Choose two)
A. mgd
B. ancpd
C. jsd
D. rpd
Correct Answer: BC
New Question 15:
To which component(s) does the JET service APIs provide access?
A. YANG modules
B. XML APIs
C. control plane
D. forwarding plane
Correct Answer: C
Reference: https://www.juniper.net/documentation/en_US/jet1.0/topics/concept/jet-service-apis-overview.html
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