Juniper JN0-421 JNCIS-DevOps Exam Questions Instant Access

Question 1

To which component(s) does the JET service APIs provide access?

AYANG modules

BXML APIs

Ccontrol plane

Dforwarding plane

Answer : C

Question 2

Which statement is true about a Junos ephemeral configuration database?

AIt can be used to trigger a commit script

BIt can be used to reduce commit time

CIt can be used to archive previous versions of the ephemeral configuration

DIt can be used to validate configuration data semantics

Answer : B

Question 3

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

AYAML

BXML

Cplain text

DGPB

EJSON

Answer : B, C, E

Question 4

You are asked by your manager to automatically switch traffic from the primary link to the backup link on the MX Series device at the branch site whenever latency is above 300 ms over a 5-minute period.

Which type of Junos script would you use in this scenario?

AOp

BSNMP

CCommit

DEvent

Answer : D

Question 5

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

AIt executes one API request per session

BIt executes APIs from multiple sessions in parallel

CIt supports only one client session at a time

DIt creates a separate thread to service JET application requests

Answer : B, D

To support application interaction with Junos OS, the JETservice process (jsd), by default, uses TCP port 32767 to listen for and receive requests from applications to execute APIs. Whenever a request comes on the TCP port, jsd creates a separate thread to service the JET application request. The session remains established as long as the client and server are both up and able to communicate with each other. Over the lifetime of a session, jsd can execute many APIs, and it can execute APIs from multiple sessions in parallel. You can have a maximum of 8 active client sessions connected at any given time.

Question 6

Click the Exhibit button.

Exhibit:

How would you test the configuration snippet shown in the exhibit?

AUse the root@router% logger SSHD_LOGIN_FAILED command

BUse the root@router% logger -e SSHD_LOGIN_FAILED command

CUse the root@router% test SSHD_LOGIN_FAILED command

DUse the root@router% event SSHD_LOGIN_FAILED command

Answer : B

Question 7

Click the Exhibit button.

Exhibit:

Your manager asks you to troubleshoot an Ansible problem when logging into a Junos device. You notice the Ansible play in question has a vars_files argument that calls the variables.yml entry file. The contents of that file are displayed in the exhibit.

What is happening in this scenario?

AThe file is an SSH key

BThe variables.yml file is not actually a YAML file

CThe file is encrypted with ansible-vault

DThe file is encrypted with ansible

Answer : C

Juniper Automation and DevOps, Specialist Exam JN0-421 JNCIS-DevOps Exam Questions