JN0-420 Online Practice Questions and Answers

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

The XML tag is a member of which NETCONF protocol layer?

A. Transport

B. Content

C. Messages D. Operations

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

A. NETCONF

B. MQTT

C. RabbitMQ

D. gRPC

What is correctly formatted JSON string?

A. Option A

B. Option B

C. Option C

D. Option D

In a Python commit script, which object provides the post-inheritance candidate configuration?

A. Commit-Script-Input

B. Junos_Configuration

C. Candidate_Configuration

D. Checkout_Configuration

Click the Exhibit button. Exhibit:

Referring to the exhibit, which exception is raised if the RPC takes 40 seconds to return a complete response?

A. jnpr.junos.exception.RpcError

B. jnpr.junos.exception.ConnectTimeoutError

C. jnpr.junos.exception.RpcTimeoutError

D. jnpr.junos.exception.LockError

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

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 target device was not defined in /etc/ansible/inventory/hosts on the control machine

B. The target device was not defined on the associated DNS servers

C. The target device was not defined in /etc/hosts on the control machine

D. The target device was not defined in /etc/ansible/hosts on the control machine

Which statement describes the purpose of Ansible roles?

A. A collection of hosts that have been categorized by purpose

B. A collection of permissions for users of your Ansible setup

C. A collection of tasks to be run on a given set of hosts

D. A collection of Ansible playbooks