A network management system needs to be alerted when a device's interface goes down. The YANG module for the device should define a mechanism to send this event asynchronously to subscribed clients. Which YANG statement should be used?

rpc interface-down { input { leaf interface-name { type string; } } }

list interface-down { key "interface-name"; leaf interface-name { type string; } }

notification interface-down { leaf interface-name { type string; } }

container interface-down { leaf interface-name { type string; } }

A network automation engineer is designing a YANG module to model the physical interfaces on a Junos device. Each interface must have a unique name, a description, an enabled flag, and one or more IPv4 addresses. The engineer needs to ensure that the model enforces the uniqueness of interface names at the data-tree level. Which YANG construct should the engineer use to model the collection of interfaces?

A leaf-list named 'interface' with the type string

A list named 'interface' with the key statement set to 'name'

A container named 'interfaces' containing a leaf-list named 'name'

A container named 'interface' with a leaf named 'name'

A vendor provides a base YANG module for system configuration. A network operator wants to add a new leaf called 'banner' under the existing 'system' container in the vendor's module, without modifying the vendor's original module. Which YANG statement should the operator use in a new module?

uses system { leaf banner { type string; } }

augment "/sys:system" { leaf banner { type string; } }

container system { leaf banner { type string; } }

Juniper NetworksCertified Specialist, Automation and DevOps (JNCIS-DevOps)

Domain 5Objective 1

Implementation Concepts JN0-423 Practice Questions (Page 1)

Part of the YANG domain, which makes up ~15% of our current practice bank. Juniper Networks does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–9 in this domain), expect 2–3 from this objective — we provide 22 practice questions to prepare you well beyond it. (estimate)

22questions here

5free pages

7concepts

Questions 1–5

1foundation · easy
Which YANG statement is used to add new nodes to an existing module without modifying the original module?
Select an answer first
2foundation · easy
Which YANG statement allows a module to reference definitions from another module?
Select an answer first
3application · medium
A network management system needs to be alerted when a device's interface goes down. The YANG module for the device should define a mechanism to send this event asynchronously to subscribed clients. Which YANG statement should be used?
Select an answer first
4application · medium
A network automation engineer is designing a YANG module to model the physical interfaces on a Junos device. Each interface must have a unique name, a description, an enabled flag, and one or more IPv4 addresses. The engineer needs to ensure that the model enforces the uniqueness of interface names at the data-tree level. Which YANG construct should the engineer use to model the collection of interfaces?
Select an answer first
5application · medium
A vendor provides a base YANG module for system configuration. A network operator wants to add a new leaf called 'banner' under the existing 'system' container in the vendor's module, without modifying the vendor's original module. Which YANG statement should the operator use in a new module?
Select an answer first

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Implementation Concepts JN0-423 Practice Questions (Page 1)

Questions 1–5

Which YANG statement is used to add new nodes to an existing module without modifying the original module?

Which YANG statement allows a module to reference definitions from another module?

A network management system needs to be alerted when a device's interface goes down. The YANG module for the device should define a mechanism to send this event asynchronously to subscribed clients. Which YANG statement should be used?

A vendor provides a base YANG module for system configuration. A network operator wants to add a new leaf called 'banner' under the existing 'system' container in the vendor's module, without modifying the vendor's original module. Which YANG statement should the operator use in a new module?

Keep studying — YANG