JN0-420 JNCIS-DevOps

This list provides a general view of the skillset required to successfully complete the specified certification exam.

Platform Automation Overview
Identify features and fuctions on an IDP sensor
MGD-based automation
JSD-based automation

NETCONF/XML API
Describe the concepts, benefits or operation of automation access methods
XML API
NETCONF
REST API
gRPC

Data Serialization
Describe the concepts, benefits or operation of data serialization
YAML
JSON
XML

Python/Ruby
Describe Python tools for automating Junos
PyEZ
RPCs
PyEZ exception handling
REST
JSNAPy
Jinja2
Describe Ruby tools for automating Junos
RubyEZ

Ansible
Describe how to use Ansible for automating Junos
Play books
Templates (Jinja2)

Junos Automation Scripts
Describe the concepts, benefits or operation of automation scripts for Junos
Commit, Op, Event, or SNMP scripts
Python
SLAX

YANG
Identify the concepts, general features of Junos support for YANG models
Implementation concepts

Juniper Extension Toolkit
Identify the concepts, general features or functionality of the Juniper Extension Toolkit
Service APIs
Notification APIs
Fast Programmatic Configuration (Ephemeral DBs)
QUESTION 2
A customer has a control machine with a default Ansible installation. During execution of an Ansible module, the Ansible control machine generates the no hosts matched error.
Which statement is correct in this scenario?

A. The targetdevice was not defined in /etc/ansible/hosts on the control machine.
B. The target device was not defined in /etc/ansible/invertory/hosts on the control machine.
C. The target device was not defined in /etc/hosts on the control machine.
D. The target device was not defined on the associated DNS servers.

Answer: A


QUESTION 3
What are three elements of a JET notification message? (Choose three.)

A. hostname
B. time
C. username
D. severity
E. subscription type

Answer: B,C,D


QUESTION 4
With which three processes does the JET service process communicate?(Choose three)

A. rpd
B. mgd
C. cosd
D. ancpd
E. snmpd

Answer: A,B,E


QUESTION 5
What is the purpose of an _intit_.py file ?

A. An_init_.py file sets all magic attributes with the _init_prefix with the appropriate default values.
B. An_init_.py file initializes a Python application with default values for instantiated objects.
C. An_init_.py file contains strings for additional directories that the Python interpreter adds to sys.path [].
D. An_init_.py file indicates to the Python interpreter that a directory contains Python packages or modules.

Answer: B

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