Juniper Juniper Certifications JN0-420 Questions & Answers

• Question 11:

  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

  Correct Answer: D

• Question 12:

  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

  Correct Answer: B

• Question 13:

  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

• Question 14:

  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

  Correct Answer: C

  Reference: http://docs.ansible.com/ansible/latest/playbooks_reuse_roles.html

• Question 15:

  You are writing a SLAX op script to provide a customized rendition of the show interface output. You want to include a command-line argument named interface and provide it with the default value of fxp0. Which code snippet accomplishes this goal?

  A. default $interface = "fxp0";

  B. argument $interface = "fxp0";

  C. param $interface = "fxp0";

  D. $interface = "fxp0";

  Correct Answer: C

  Reference: "This Week Applying Junos Automation" By Curtis Call pages 32-33

• Question 16:

  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

  Correct Answer: AB

• Question 17:

  What is the purpose of an __init__.py file?

  A. An __init__.py file initializes a Python application with default values for instantiated objects

  B. An __init__.py file indicates to the Python interpreter that a directory contains Python packages or modules

  C. __init__.py file sets all magic attributes with the __init__.prefix with the appropriate default values

  D. An __init__.py file contains strings for additional directories that the Python interpreter adds to sys.path []

  Correct Answer: B

• Question 18:

  Which YAML document represents a valid mapping (dictionary) of sequences (lists)?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: D

  Reference: https://github.com/Animosity/CraftIRC/wiki/Complete-idiot%27s-introduction-to-yaml

• Question 19:

  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

  Correct Answer: D

  Reference: https://www.juniper.net/documentation/en_US/junos-ansible1.0/topics/task/troubleshooting/ junos-ansible-connection-errors-troubleshooting.html

• Question 20:

  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()

  Correct Answer: B