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Juniper JN0-221 Exam Practice Questions (P. 4)

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Question #16
Which two statements about DevOps are correct? (Choose two.)
  1. A
    DevOps is a methodology that allows for frequent, quick modifications
  2. B
    DevOps is a methodology that ensures that collaboration does not occur across organizational boundaries
  3. C
    DevOps is a methodology used to develop software or systems
  4. D
    DevOps is a methodology that is limited to small codebase development

Correct Answer:
AC
Reference:
https://www.juniper.net/us/en/products-services/what-is/devnetops/

Question #17
Which statement is correct about Infrastructure as Code (IaC)?
  1. A
    It is an infrastructure that runs identical operating systems
  2. B
    It is an infrastructure where devices are entirely virtualized
  3. C
    It is an infrastructure that is used for beta code testing
  4. D
    It is an infrastructure where devices are managed like software

Correct Answer:
D
Reference:
https://www.vmware.com/topics/glossary/content/infrastructure-as-code

Question #18
Which two statements about Ansible are true? (Choose two.)
  1. A
    Ansible modules only execute a change if required
  2. B
    By default, Ansible core modules use NETCONF to connect to the remote host
  3. C
    By default, Ansible playbooks are executed locally
  4. D
    Ansible uses an agentless architecture

Correct Answer:
BD
Reference:
https://www.juniper.net/documentation/en_US/junos-ansible/topics/concept/junos-ansible-overview.html#:~:text=Ansible%20uses%20an%20agentless
%20architecture,software%20on%20the%20managed%20nodes.&text=Thus%2C%20Ansible%20users%20can%20get,of%20Python%20to%20use%20Ansible

Question #19
Which two Python packages use NETCONF to interact with Junos devices? (Choose two.)
  1. A
    numpy
  2. B
    jsnapy
  3. C
    junos-eznc
  4. D
    pyyaml

Correct Answer:
BC

Question #20
Which Python code block is an example of a context manager?
  1. A
    while True: device "" Device(host-"vmx-1", user-"lab", passwd-"lab123") ...
  2. B
    try: device "" Device(host-"vmx-1", user-"lab", passwd-"lab123") ... except: print("Unable to connect to the vMX1")
  3. C
    with Device(host="vmx-1", user="lab", passwd="lab123") as device: ...
  4. D
    for host in ["vmx-1", "vmx-2"]: device "" Device(host-host, user-"lab", passwd-"lab123") ...

Correct Answer:
B
Reference:
https://packetpushers.net/using-python-context-managers/

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