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Juniper Automation and DevOps, Associate JN0-224 Exam Questions
Question 1
Which two statements are true about an XML schema document? (Choose two.)
Answer : C, D
An XML schema document (XSD) is a key component in defining the structure and constraints of XML data used in various applications, including Junos:
Authoritative Source (C): An XML schema document serves as the authoritative definition of the structure, content, and semantics of XML documents. It ensures that the XML data adheres to specific rules and formats, which is essential for both operational and configuration XML.
XSD Format (D): XML schema documents are typically written in the XSD (XML Schema Definition) format, which provides a formal description of the XML document's structure.
Option A is incorrect because XML schemas are not formatted as XLT files (which are related to XSLT transformations), and Option B is incorrect because XML schemas can indeed be examined in the Junos CLI using appropriate commands.
W3C XML Schema Definition Language (XSD) Documentation: Provides comprehensive information on the XSD format.
Juniper Networks Documentation: Discusses the role of XML schemas in managing Junos configurations.
Question 2
A REST API client uses which two HTTP methods to execute RPC requests on the server? (Choose two.)
Answer : A, C
REST APIs use HTTP methods to perform different operations on resources. In the context of RPC (Remote Procedure Call) requests:
GET: This method is used to retrieve data from the server. In a REST API, it is commonly used to fetch information about resources, such as the current configuration or operational state.
POST: This method is used to send data to the server to create or update a resource. In the context of RPC, POST is often used to execute a procedure on the server that may result in the modification of a resource or triggering of an action.
Options B (HEAD) and D (CONNECT) are not typically used for executing RPC requests:
HEAD is similar to GET but only retrieves the headers, not the body of the response.
CONNECT is used to establish a tunnel to the server, primarily for SSL-encrypted communication, and is not commonly associated with RESTful RPC operations.
Supporting Reference:
Juniper Networks REST API Documentation: The documentation provides detailed information about the use of HTTP methods in Juniper's RESTful services.
'RESTful Web Services' by Leonard Richardson and Sam Ruby: This book explains the principles of REST and how different HTTP methods, particularly GET and POST, are used to interact with RESTful APIs.
Question 3
You want to use a Python package or module.
In this scenario, which statement would accomplish this task?
Answer : D
In Python, to use a package or module, you use the import statement. This statement allows you to load a module into your script so that you can use its functions, classes, and variables. For example, if you wanted to use the math module, you would write import math. This makes all the functions and constants in the math module available for use in your program.
Option A (reap), B (dir), and C (input) do not serve the purpose of importing modules. dir is used to list the attributes of an object, input is used to get user input, and reap is not a valid Python command related to importing modules.
Supporting Reference:
Python Documentation on Imports: The Python documentation provides clear guidelines on how to use the import statement to include modules in your Python scripts.
Question 4
Which two data structures are used in JSON? (Choose two.)
Answer : B, C
In JSON (JavaScript Object Notation), the two primary data structures are:
Objects: These are collections of key-value pairs, where each key is a string, and the value can be a string, number, array, boolean, or another object. In Python, this structure is analogous to a dictionary.
Arrays: These are ordered lists of values, where each value can be of any data type, including another array or object. In Python, this structure is similar to a list.
Option A (tuples) and Option D (dictionaries) refer to Python-specific data structures and are not directly used in JSON.
Supporting Reference:
JSON Documentation and Tutorials: JSON objects and arrays are the standard data structures used in this format, as described in many tutorials and the official JSON documentation.
Question 5
Exhibit.
Referring to the exhibit, which XML XPath expression will only show the IP address XML elements?
Question 6
You are using the curl tool to include multiple RPCs in a REST API request.
Which HTTP method must be used for this request?
Answer : C
Question 7
You are asked to develop an on-box Junos script that prevents deletion of the SNMP configuration.
Which type of script serves this purpose?
Answer : A
A commit script in Junos is used to enforce policies and configuration constraints on the device. These scripts are written in Extensible Stylesheet Language Transformations (XSLT) or Python and are executed automatically during the commit process of a configuration change.
In this context, to prevent the deletion of the SNMP configuration, a commit script is the appropriate choice. It can be designed to check the configuration changes being committed and reject any commit that attempts to delete or modify the SNMP configuration. This script essentially acts as a gatekeeper, ensuring that only allowable changes are committed to the device configuration.
Supporting Reference:
Juniper Networks Commit Scripts Documentation: The official Juniper documentation provides examples and use cases of commit scripts, including how they can be used to prevent unauthorized changes to the device configuration.
'Junos Automation Scripting' by Jonathan Looney: This resource gives practical examples and best practices for creating commit scripts to enforce configuration policies in Junos OS.
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