JN0-220 Real Exam Questions and Verified Answers

Question 1 Multiple choice

What are two characteristics found in a modern DevOps environment? (Choose two.)

A
The development and operations environments are identical
B
The development and operations environments are different
C
The DevOps practice relies heavily on the use of physical hardware
D
The DevOps practice relies heavily on the use of virtualization

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Correct answers: B, D

Question 2 Single choice

What does the statement "Ansible provides idempotent operations."
mean?

A
The result of performing the operation once is exactly the same as the result of performing it repeatedly without any intervening actions.
B
The result of performing the operation once is not exactly the same as the result of performing it repeatedly without any intervening actions.
C
The result of performing the operation once will not allow the operation to be run again without any intervening actions to correct the failure.
D
The result of performing the operation once will not allow the operation to be run again without any intervening actions.

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Correct answer: A

Explanation

References:
https://docs.ansible.com/ansible/latest/reference_appendices/glossary.html

Question 3 Multiple choice

You want to restrict access to the REST API on a Junos device?

What are two ways to accomplish this task? (Choose two.)

A
Enable a maximum number of connections
B
Restrict access by the source MAC address
C
Restrict access by the source IP address
D
Enable a schedule of specific access times

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Correct answers: C, D

Question 4 Multiple choice

Which two statements are true about data structures? (Choose two.)

A
YAML is human readable and supports serializing arbitrary native data structures
B
YAML follows the lowest common denominator data types and requires simple processing between different programming environments
C
JSON is language dependent, which uses conventions that are familiar to programmers of languages like C, C++, Java, Perl, and Python
D
JSON is simple to generate and parse, though human readability is sacrificed

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Correct answers: A, C

Question 5 Single choice

Which statement is correct about Python variables once they are created?

A
A global variable can only be used by functions that are defined later
B
All variables in Python can be used by any function within the script
C
A global variable can be used by any function within the script
D
A global can only be used within the function that created it

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Correct answer: A

Explanation

References:
https://stackoverflow.com/questions/423379/using-global-variables-in-a-function

Question 6 Single choice

How does YAML differ from JSON in data interchange formats?

A
YAML supports comments
B
JSON is language specific
C
JSON is a superset of YAML
D
YAML is not indentation aware

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Correct answer: A

Question 7 Multiple choice

Which statement is correct about Ansible? (Choose two.)

A
Ansible core modules for the Junos OS are developed by Ansible developers
B
Ansible Galaxy modules for the Junos OS are developed by Juniper Networks developers
C
Ansible Galaxy modules for the Junos OS and Ansible core modules for the Junos OS can coexist on the same control machine
D
Ansible Galaxy modules for the Junos OS and Ansible core modules for the Junos OS cannot coexist on the same control machine

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Correct answers: A, C

Question 8 Single choice

Which statement is true about using Ansible a Junos device?

A
The Junos device does not have an Ansible agent installed
B
SFTP must be used to allow communication between the Ansible control server and the Junos device
C
An Ansible playbook is a set of tasks written in XML
D
Ansible modules are copied and executed on the Junos device

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Correct answer: D

Question 9 Single choice

YAML was designed as a superset of which format?

A
XML
B
XSD
C
Ansible
D
JSON

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Correct answer: D

Explanation

References:
https://medium.com/@williamhayes/yaml-is-a-superset-of-json-it-is-explained-in-more-detail-here-1d758a069508

Question 10 Single choice

Which statement is correct about Ansible playbooks?

A
A playbook is a collection of tasks to be performed on the host.
B
A playbook is called by multiple Python modules.
C
A playbook is a specific Python module that is executed on a host.
D
A playbook is a collection of host files?

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Correct answer: A

Explanation

References:
https://www.tutorialspoint.com/ansible/ansible_playbooks.htm