JN0-421 Online Training Archives

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1. Which two automation frameworks are agentless when managing Junos devices?

Chef

Ansible

Puppet

SaltStack

2. With the inclusion of Python in the Junos OS, what is an advantage that this feature provides administrators?

The ability to compile Python scripts on the device.

The ability to execute Python scripts on the device.

It provides compatibility with all Python versions.

It provides the Python command line (REPL) for testing

3. What are two benefits of network automation? (Choose two )

to enforce consistency in automated devices

increase programming language fluency

to provide historical configuration management

to improve product lifecycle management

4. Which command is used to execute an Ansible playbook?

ansible-vault

ansible

ansible-galaxy

ansible-playbook

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

It executes APIs from multiple sessions in parallel

It executes one API request per session.

It creates a separate thread to service JET application requests

It supports only one client session at a time

6. Exhibit:

Referring to the exhibit. how would you solve this issue ?

Enable protocol-version v1 under the SSH configuration hierarchy.

Enable ssh under the NETCONF configuration hierarchy.

Enable outbound-ssh with services netconf under the SSH configuration hierarchy.

Enable trace options under the NETCONF configuration hierarchy.

In the Python commit script, which object provides the post-inheritance candidate configuration?

Commit-Script-Input

Checkout_Configuration

Junos_ Configuration

Canadidate_ Configuration

8. Which format does an Ansible playbook use

JSON

YAML

XML

CSV

Referring to the exhibit, what should <CHANGEME> be replaced with to correctly print out the exception message Cannot cannot to device ?

PeramissionError

RpcError

ConnectError

CommitError

10. Click the Exhibit:

Referring to the exhibit, what will he hostname be if interface ge-0/0/0 goes down?

int-test-2

int-test-3

int-test-4

int-test-1

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11. Click the Exhibit button.

You need to programmatically extract interface information using PYeZ from you MX Series device. You log in and use the show interfaces terse I display xml rpc command and see the information shown in the exhibit.

What is the correct PyEZ syntax to accomplish this task?

A)

Option A

Option B

Option C

Option D

12. Which transport protocol must be supported by RFC-compliant NETCONF implementations?

SSH

Telnet

TLS

BEEP

13. Which command is valid for assessing a Junos device using the RESTful API on the default port?

A)

Option A

Option B

Option C

Option D

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

A)

Option A

Option B

Option C

Option D

15. Which two statements are correct about JSON characteristics? (Choose two.)

JSON is programming language independent

JSON uses # # for comments

JSON is a supported template language.

JSON is easy to read for humans and devices.

16.

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

XML

YANG

YAML

JSON

17. Which statement is true about a Junos ephemeral configuration database?

It can be used to reduce commit time.

It can be used to archive previous versions of the ephemeral configuration.

It can be used to validate configuration data semantics.

It can be used to trigger a commit script.

18. Click the Exhibit button.

Where would the Python code shown in the exhibit be used?

a commit script

an op script

an event script

an SNMP script

19. What is a purpose of RubyEZ?

to provide a Ruby interface to Juniper devices that support Puppet

to provide an off device interface to Ruby

to provide a Ruby interface to the Junos Space management product

to provide a Ruby framework for interfacing with Juniper devices

20. What is the purpose of an _intit_.py file ?

An_init_.py file sets all magic attributes with the _init_prefix with the appropriate default values.

An_init_.py file initializes a Python application with default values for instantiated objects.

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

An_init_.py file indicates to the Python interpreter that a directory contains Python packages or modules.

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21. Which two automation frameworks are agentless when managing Junos devices?

Chef

Ansible

Puppet

SaltStack

22. With the inclusion of Python in the Junos OS, what is an advantage that this feature provides administrators?

The ability to compile Python scripts on the device.

The ability to execute Python scripts on the device.

It provides compatibility with all Python versions.

It provides the Python command line (REPL) for testing

23. What are two benefits of network automation? (Choose two )

to enforce consistency in automated devices

increase programming language fluency

to provide historical configuration management

to improve product lifecycle management

24. Which command is used to execute an Ansible playbook?

ansible-vault

ansible

ansible-galaxy

ansible-playbook

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

It executes APIs from multiple sessions in parallel

It executes one API request per session.

It creates a separate thread to service JET application requests

It supports only one client session at a time

26. Exhibit:

Referring to the exhibit. how would you solve this issue ?

Enable protocol-version v1 under the SSH configuration hierarchy.

Enable ssh under the NETCONF configuration hierarchy.

Enable outbound-ssh with services netconf under the SSH configuration hierarchy.

Enable trace options under the NETCONF configuration hierarchy.

27.

In the Python commit script, which object provides the post-inheritance candidate configuration?

Commit-Script-Input

Checkout_Configuration

Junos_ Configuration

Canadidate_ Configuration

28. Which format does an Ansible playbook use

JSON

YAML

XML

CSV

29.

Referring to the exhibit, what should <CHANGEME> be replaced with to correctly print out the exception message Cannot cannot to device ?

PeramissionError

RpcError

ConnectError

CommitError

30. Click the Exhibit:

Referring to the exhibit, what will he hostname be if interface ge-0/0/0 goes down?

int-test-2

int-test-3

int-test-4

int-test-1

Page 4 of 7

31. Click the Exhibit button.

Option A

Option B

Option C

Option D

32. Which transport protocol must be supported by RFC-compliant NETCONF implementations?

SSH

Telnet

TLS

BEEP

33. Which command is valid for assessing a Junos device using the RESTful API on the default port?

A)

Option A

Option B

Option C

Option D

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

A)

Option A

Option B

Option C

Option D

35. Which two statements are correct about JSON characteristics? (Choose two.)

JSON is programming language independent

JSON uses # # for comments

JSON is a supported template language.

JSON is easy to read for humans and devices.

36.

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

XML

YANG

YAML

JSON

37. Which statement is true about a Junos ephemeral configuration database?

It can be used to reduce commit time.

It can be used to archive previous versions of the ephemeral configuration.

It can be used to validate configuration data semantics.

It can be used to trigger a commit script.

38. Click the Exhibit button.

Where would the Python code shown in the exhibit be used?

a commit script

an op script

an event script

an SNMP script

39. What is a purpose of RubyEZ?

to provide a Ruby interface to Juniper devices that support Puppet

to provide an off device interface to Ruby

to provide a Ruby interface to the Junos Space management product

to provide a Ruby framework for interfacing with Juniper devices

40. What is the purpose of an _intit_.py file ?

An_init_.py file sets all magic attributes with the _init_prefix with the appropriate default values.

An_init_.py file initializes a Python application with default values for instantiated objects.

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

An_init_.py file indicates to the Python interpreter that a directory contains Python packages or modules.

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41. Which two automation frameworks are agentless when managing Junos devices?

Chef

Ansible

Puppet

SaltStack

42. With the inclusion of Python in the Junos OS, what is an advantage that this feature provides administrators?

The ability to compile Python scripts on the device.

The ability to execute Python scripts on the device.

It provides compatibility with all Python versions.

It provides the Python command line (REPL) for testing

43. What are two benefits of network automation? (Choose two )

to enforce consistency in automated devices

increase programming language fluency

to provide historical configuration management

to improve product lifecycle management

44. Which command is used to execute an Ansible playbook?

ansible-vault

ansible

ansible-galaxy

ansible-playbook

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

It executes APIs from multiple sessions in parallel

It executes one API request per session.

It creates a separate thread to service JET application requests

It supports only one client session at a time

46. Exhibit:

Referring to the exhibit. how would you solve this issue ?

Enable protocol-version v1 under the SSH configuration hierarchy.

Enable ssh under the NETCONF configuration hierarchy.

Enable outbound-ssh with services netconf under the SSH configuration hierarchy.

Enable trace options under the NETCONF configuration hierarchy.

47.

In the Python commit script, which object provides the post-inheritance candidate configuration?

Commit-Script-Input

Checkout_Configuration

Junos_ Configuration

Canadidate_ Configuration

48. Which format does an Ansible playbook use

JSON

YAML

XML

CSV

49.

Referring to the exhibit, what should <CHANGEME> be replaced with to correctly print out the exception message Cannot cannot to device ?

PeramissionError

RpcError

ConnectError

CommitError

50. Click the Exhibit:

Referring to the exhibit, what will he hostname be if interface ge-0/0/0 goes down?

int-test-2

int-test-3

int-test-4

int-test-1

Page 6 of 7

51. Click the Exhibit button.

Option A

Option B

Option C

Option D

52. Which transport protocol must be supported by RFC-compliant NETCONF implementations?

SSH

Telnet

TLS

BEEP

53. Which command is valid for assessing a Junos device using the RESTful API on the default port?

A)

Option A

Option B

Option C

Option D

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

A)

Option A

Option B

Option C

Option D

55. Which two statements are correct about JSON characteristics? (Choose two.)

JSON is programming language independent

JSON uses # # for comments

JSON is a supported template language.

JSON is easy to read for humans and devices.

56.

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

XML

YANG

YAML

JSON

57. Which statement is true about a Junos ephemeral configuration database?

It can be used to reduce commit time.

It can be used to archive previous versions of the ephemeral configuration.

It can be used to validate configuration data semantics.

It can be used to trigger a commit script.

58. Click the Exhibit button.

Where would the Python code shown in the exhibit be used?

a commit script

an op script

an event script

an SNMP script

59. What is a purpose of RubyEZ?

to provide a Ruby interface to Juniper devices that support Puppet

to provide an off device interface to Ruby

to provide a Ruby interface to the Junos Space management product

to provide a Ruby framework for interfacing with Juniper devices

60. What is the purpose of an _intit_.py file ?

An_init_.py file sets all magic attributes with the _init_prefix with the appropriate default values.

An_init_.py file initializes a Python application with default values for instantiated objects.

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

An_init_.py file indicates to the Python interpreter that a directory contains Python packages or modules.

Page 7 of 7

61. Which data serialization method does the Junos CLI use to communicate with the Junos management process (mgd) /

XML

YAML

gRPC

JSON

62. By default, Python event scripts and SNMP script configured on a Junos device execute as which user ?

snmpd

wheel

root

nobody

63. You are asked by you 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?

Commit

Event

SNMP

64. Click the Exhibit button.

The r0 device is currently in a factory-default state. The console connection of r0 is reachable using Telnet on TCP port 555 of the console_server host.

Referring to the exhibit, which statement is true?

The NETCONF service must be configured for the playbook to run successfully.

The Telnet service must be configured for the playbook to run successfully.

The device does not require configuration changes for the playbook to run successfully.

A password for the root user must be configured for the playbook to run successfully.

65. Click the Exhibit button.

What will executing the program shown in the exhibit retrieve from a Junos device?

the previous configuration changes of the device

the current software version on the device

the current memory utilization

the FPC inventory of the device

66. Click the Exhibit button.

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

Use the [email protected] test SSH_LOGIN_FAILED command.

Use the [email protected] logger SSH_LOGIN_FAILED command.

Use the [email protected] event SSH_LOGIN_FAILED command.

Use the [email protected] logger Ce SSH_LOGIN_FAILED command.