JN0-420 Online Practice Questions and Answers

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

Which two statements are correct about JSON characteristics? (Choose two)

A. JSON is a supported template language

B. JSON is easy to read for humans and devices

C. JSON uses ## for comments

D. JSON is programming language independent

What are two attributes of the jsd JET service process? (Choose two)

A. It executes one API request per session

B. It executes APIs from multiple sessions in parallel

C. It supports only one client session at a time

D. It creates a separate thread to service JET application requests

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

What is purpose of RubyEZ?

A. to provide a Ruby framework for interfacing with Juniper devices

B. to provide an off device interface to Ruby

C. to provide a Ruby interface to Juniper devices that support Puppet

D. to provide a Ruby interface to the Junos Space management product

Which data serialization is used between RubyEZ and a Junos device?

A. SNMP

B. OpenConfig

C. XML

D. automated CLI

What are two benefits of network automation? (Choose two)

A. to enforce consistency in automated devices

B. to increase programming language fluency

C. to provide historical configuration management

D. to improve product lifecycle management

Click the Exhibit button. Exhibit:

You need to programmatically extract interface information using PyEZ from your MX Series device. 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?

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()

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

Click the Exhibit button. Exhibit:

Referring to the exhibit, what are two results of the Python operational script? (Choose two)

A. It disables a user-selected interface

B. It commits the configuration

C. It deactivates a user-selected interface

D. It does not commit the configuration

Click the Exhibit button. Exhibit:

What will executing the program shown in the exhibit retrieve from a Junos device?

A. the previous configuration changes of the device

B. the current memory utilization

C. the FPC inventory of the device

D. the current software version on the device

Click the Exhibit button.

Exhibit:

Junos Event Policy Configuration

Referring to the exhibit. What will the hostname be if interface ge-0/0/0 goes down?

A. int-test-2

B. int-test-1

C. int-test-4

D. int-test-3

Which data serialization method does the Junos CLI use to communicate with the Junos management process (mgd)?

A. JSON

B. gRPC

C. XML

D. YAML

Click the Exhibit button. Exhibit:

Referring to the exhibit, which Python statement selects the element for the user logged in on the pts/2 TTY?

A. response.find("./uptime-information/user-table/user-entry/tty='pts/2'")

B. response.find("./uptime-information/user-table/[tty='pts/2']/user-entry")

C. response.find("../user-entry/[tty='pts/2']")

D. response.find("./uptime-information/user-table/user-entry@tty='pts/2'")

Using the RESTful API on a Junos device, you are able to retrieve configuration information in which three formats? (Choose three)

A. YAML

B. XML

C. plain text

D. GPB E. JSON