Juniper JNCIS JN0-420 Questions & Answers

• Question 1:

  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

  Correct Answer: BCE

  Reference: https://www.juniper.net/documentation/en_US/junos/information-products/pathway-pages/restapi/rest-api.html

• Question 2:

  Click the Exhibit button. Exhibit:

  

  Referring to the exhibit, the configuration components are displayed in which format?

  A. XML

  B. JSON

  C. YAML

  D. YANG

  Correct Answer: B

• Question 3:

  You want to implement a function that is available in the Junos OS , but not defined in a standard model. Which statement would you use with YANG to accomplish this task?

  A. augment

  B. deviation

  C. case

  D. choice

  Correct Answer: D

• Question 4:

  Your organization is creating a custom YANG module. You are asked to create a leaf node called timeout

  with a data type of duration.

  In this scenario, what is the appropriate syntax for this leaf node?

  

  

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: D

• Question 5:

  Click the Exhibit button. Exhibit:

  

  Referring to the exhibit, what should be replaced with to correctly print out the exception message Cannot connect to device?

  A. RpcError

  B. ConnectError

  C. PermissionError

  D. CommitError

  Correct Answer: B

• Question 6:

  Click the Exhibit button. Exhibit:

  

  Referring to the exhibit, what is the execution order of tasks in the Ansible playbook?

  A. Task A > Task B

  B. Task A > Task B > Task C

  C. Task C > Task B

  D. Task C > Task B > Task A

  Correct Answer: A

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

• Question 7:

  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

  Correct Answer: C

• Question 8:

  Which pair of daemons in the Junos OS handle automation?

  A. mgd and jsd

  B. mgd and JET

  C. jsd and gRPC

  D. JET and gRPC

  Correct Answer: A

• Question 9:

  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'")

  Correct Answer: B

• Question 10:

  What are three supported languages for operational scripts on Junos devices? (Choose three)

  A. Python

  B. XSLT

  C. SLAX

  D. Java

  E. PHP

  Correct Answer: ABC

  Junos automation scripts can be written in the following scripting languages:

  Extensible Stylesheet Language Transformations (XSLT)

  Stylesheet Language Alternative syntaX (SLAX)

  Python

  Reference: https://www.juniper.net/documentation/en_US/junos/topics/concept/junos-script-automationoverview.html