[Apr 05, 2026] JN0-224 Test Prep Training Practice Exam Questions Practice Tests
Exam Questions Answers Braindumps JN0-224 Exam Dumps PDF Questions
Juniper JN0-224 Exam Syllabus Topics:
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NEW QUESTION # 27
Which two statements are valid regarding Junos automation? (Choose two.)
- A. The mgd process handles JET API requests.
- B. The jsd process handles JET API requests.
- C. The mod process handles XML API calls.
- D. The jsd process handles XML API calls.
Answer: B,D
Explanation:
In Junos automation, several processes handle API requests, and understanding which process handles what is crucial:
jsd Process:
XML API Calls (A): The jsd process is responsible for handling XML API calls, which are a significant part of Junos automation. XML API allows for structured and standardized communication with Junos devices, enabling automation scripts to query and configure devices.
JET API Requests (C): The jsd process also handles JET (Junos Extension Toolkit) API requests. JET provides a more modern, programmable interface for interacting with Junos OS, and jsd is the process that manages these interactions.
mgd Process (Incorrect Option):
Not for JET API Requests: The mgd process handles general management operations, such as CLI commands and managing the configuration database, but it does not handle JET API requests. That role is fulfilled by jsd.
mod Process (Incorrect Option):
Not for XML API Calls: The mod process deals with managing chassis components and is not involved in handling XML API calls.
Reference:
Juniper Networks JET and XML API Documentation: Describes the roles of jsd in handling both XML and JET API requests.
Junos Automation and DevOps Documentation: Provides insights into how different processes interact with Junos APIs.
NEW QUESTION # 28
Exhibit.
Referring to the exhibit, which XML XPath expression will only show the IP address XML elements?
- A. //address/name
- B. /address/name
- C. //name
- D. /name
Answer: A
Explanation:
https://www.w3schools.com/xml/xpath_syntax.asp
NEW QUESTION # 29
What is the correct Python script syntax to prompt for input?
- A. hostIP = input{Device IP address: }
- B. input("Device IP address: ") = hostIP
- C. hostIP = input"Device IP address: "
- D. hostIP = input("Device IP address: ")
Answer: D
Explanation:
In Python, the correct syntax to prompt the user for input and store that input in a variable is:
input(prompt): The input() function is used to take input from the user. The string provided as an argument (inside the parentheses) is displayed as a prompt to the user. The input provided by the user is returned as a string and can be stored in a variable.
Example:
hostIP = input("Device IP address: ")
In this example, "Device IP address: " is the prompt displayed to the user, and the user's input will be stored in the variable hostIP.
Options B, C, and D are syntactically incorrect in Python.
Reference:
Python Official Documentation: Describes the use of the input() function for getting user input.
Python Tutorials: Various tutorials demonstrate how to properly use the input() function in scripts.
NEW QUESTION # 30
Which two tools would you use to make REST API requests? (Choose two.)
- A. Web browser
- B. cURL
- C. NETCOfJF
- D. SSH
Answer: A,B
Explanation:
REST API requests can be made using various tools that support HTTP methods. Two common tools are:
cURL: A command-line tool that allows you to send HTTP requests, including GET, POST, PUT, and DELETE. It is widely used for testing and interacting with RESTful APIs due to its simplicity and flexibility.
Web Browser: Modern web browsers can be used to send HTTP GET requests directly by entering the URL into the address bar. Additionally, browser extensions like Postman or built-in developer tools can be used to construct and send more complex REST API requests.
Option B (NETCOfJF) is incorrect as it does not refer to a standard tool for making REST API requests.
Option D (SSH) is incorrect because SSH is a protocol used for secure remote login and command execution, not for sending REST API requests.
Supporting Reference:
cURL Documentation: Official cURL documentation provides extensive information on how to use cURL to interact with REST APIs.
Web Development and REST API Guides: Many web development resources and REST API documentation recommend using web browsers and tools like cURL for testing and interacting with APIs.
NEW QUESTION # 31
A REST API client uses which two HTTP methods to execute RPC requests on the server? (Choose two.)
- A. CONNECT
- B. POST
- C. GET
- D. HEAD
Answer: B,C
Explanation:
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.
NEW QUESTION # 32
Which two statements about Ansible are correct? (Choose two.)
- A. Ansible is an open source project.
- B. Ansible can use a single playbook to configure devices from multiple vendors.
- C. Ansible modules must be written in Go.
- D. Ansible requires a license to unlock full functionality.
Answer: A,B
NEW QUESTION # 33
Exhibit.
Referring to the exhibit, which statement about REST is correct?
- A. The device is configured to allow connections from the REST API Explorer
- B. The device is configured to allow HTTPS connections on port 3443.
- C. The device is configured to allow only two simultaneous REST connections.
- D. The device is configured to allow HTTP connections on port 3030.
Answer: B
NEW QUESTION # 34
You are asked to use the REST API to retrieve interface configuration information from your Junos device. You decide to use a cURL HTTP GET command to retrieve this information.
In this scenario, which two statements are correct? (Choose two.)
- A. You can retrieve this data in HTML or JSON formats.
- B. You must have SSH enabled on the Junos device.
- C. You must Include the authentication Information with each request.
- D. You can retrieve this data in XML or JSON formats.
Answer: C,D
Explanation:
When using the REST API to retrieve interface configuration information from a Junos device:
Data Formats (C): The information can be retrieved in XML or JSON formats. These are the two standard data formats supported by the Junos REST API for representing configuration and operational data.
Authentication (D): For each HTTP request, especially when using tools like cURL, authentication information must be included. This is typically done using basic authentication (username and password) or an authentication token.
Option A is incorrect because HTML is not a supported format for REST API data retrieval in Junos, and Option B is incorrect because SSH is not required for REST API requests; the REST API typically uses HTTP/HTTPS.
Reference:
Junos REST API Documentation: Details the data formats (XML, JSON) supported by the Junos REST API and the need for authentication.
cURL Usage with REST API: Provides examples of how to use cURL with Junos REST API, including the necessity of providing authentication.
NEW QUESTION # 35
You are using the curl tool to include multiple RPCs in a REST API request.
Which HTTP method must be used for this request?
- A. GET
- B. POST
- C. HEAD
- D. PUT
Answer: B
NEW QUESTION # 36
Which two statements are true about an XML schema document? (Choose two.)
- A. It is formatted as an XLT file.
- B. It cannot be examined in the Junos CLI.
- C. It is an authoritative source for operational and configuration XML.
- D. lit is formatted as an XSD file.
Answer: C,D
Explanation:
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.
Reference:
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.
NEW QUESTION # 37
Which two data structures are used in JSON? (Choose two.)
- A. objects
- B. dictionaries
- C. arrays
- D. tuples
Answer: A,C
Explanation:
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.
NEW QUESTION # 38
Which two statements about Junos automation are correct? (Choose two.)
- A. Junos automation allows for device provisioning through the console port.
- B. The Junos REST API client is on-box.
- C. The Junos REST API client is off-box.
- D. Junos automation does not allow for device provisioning throuqh the console port.
Answer: A,B
NEW QUESTION # 39
You are asked to develop an on-box Junos script that prevents deletion of the SNMP configuration.
Which type of script serves this purpose?
- A. SNMP script
- B. event script
- C. op script
- D. commit script
Answer: D
Explanation:
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.
NEW QUESTION # 40
Which two statements are correct about the Junos REST API Explorer? (Choose two.)
- A. The REST API Explorer is enabled by default on all Junos devices.
- B. The REST API Explorer returns data only in XML format.
- C. The REST API Explorer supports multiple RPC calls.
- D. The REST API Explorer supports both GET and POST calls.
Answer: C,D
Explanation:
The Junos REST API Explorer provides an interactive environment to explore and execute REST API calls. The correct statements are:
Supports GET and POST Calls (C): The REST API Explorer allows users to make both GET and POST requests, enabling retrieval and submission of data to the Junos device.
Supports Multiple RPC Calls (D): The REST API Explorer can execute multiple RPC (Remote Procedure Call) commands, allowing a wide range of operations to be performed directly through the interface.
Option A is incorrect because the REST API Explorer is not enabled by default; it must be enabled manually. Option B is incorrect because the REST API Explorer returns data in both XML and JSON formats, not just XML.
Reference:
Junos REST API Explorer Documentation: Provides details on the supported operations and how to use the Explorer for different types of requests.
Juniper Networks Documentation: Covers the setup and usage of the REST API Explorer.
NEW QUESTION # 41
Which type of on-box automation script is designed to run every time a user executes a configuration change?
- A. SNMP
- B. commit
- C. event
- D. operation
Answer: B
Explanation:
In Junos OS, a commit script is an on-box automation script that runs every time a configuration change is committed. Commit scripts are used to enforce configuration policies, validate configuration changes, or make automatic adjustments to configurations when certain conditions are met.
Commit Script (C): Executes automatically during the commit process, ensuring that the new configuration adheres to specific rules or conventions before it is applied to the system.
Event, SNMP, and operation scripts are used for other purposes in Junos automation but do not run automatically with every configuration change.
Reference:
Junos OS Automation Scripts Guide: Provides details on different types of scripts, including commit scripts, and their use cases.
Juniper Networks Documentation: Offers examples and best practices for creating and using commit scripts.
NEW QUESTION # 42
Which development model is the classic approach to software development?
- A. Kanban
- B. Scrum
- C. Lean
- D. Waterfall
Answer: D
NEW QUESTION # 43
Your organization is developing an application to automate management of Junos network appliances. You want to use the existing PyEZ libraries to improve the development process. Which API would satisfy this requirement?
- A. XML API
- B. RPC API
- C. REST API
- D. JETAPI
Answer: C
NEW QUESTION # 44
What is the difference between a list and a tuple in Python?
- A. Lists are mutable objects that use parentheses, and tuples are immutable objects that use square brackets.
- B. Lists are mutable objects that use square brackets, and tuples are immutable objects that use parentheses.
- C. Lists are immutable objects that use square brackets, and tuples are mutable objects that use parentheses.
- D. Lists are immutable objects that use parentheses, and tuples are immutable objects that use square brackets.
Answer: B
Explanation:
In Python, the distinction between lists and tuples is essential for efficient programming:
Lists:
Mutable (B): This means that once a list is created, its elements can be changed, added, or removed. Lists are versatile and commonly used when the data is expected to change.
Square Brackets: Lists are defined using square brackets [].
Example:
my_list = [1, 2, 3]
my_list[0] = 10 # Modifying the first element
Tuples:
Immutable (B): Once a tuple is created, it cannot be altered. Tuples are used when a fixed collection of items is needed, providing more integrity to the data.
Parentheses: Tuples are defined using parentheses ().
Example:
my_tuple = (1, 2, 3)
# my_tuple[0] = 10 # This would raise an error because tuples are immutable Reference:
Python Official Documentation: The Python Language Reference provides detailed information on data types like lists and tuples, including their mutability and syntax.
Automation Scripts: In the context of automation, understanding when to use mutable or immutable data structures can significantly impact script performance and reliability.
NEW QUESTION # 45
YAML uses which two data structures? (Choose two.)
- A. mappings
- B. arrays
- C. objects
- D. sequences
Answer: A,D
Explanation:
YAML (YAML Ain't Markup Language) primarily uses two data structures:
Mappings: These are key-value pairs, similar to dictionaries or hashes in programming languages. In YAML, mappings are used to represent associative arrays or objects. They are defined with a colon (:) separating the key from the value.
Example:
key: value
name: John Doe
Sequences: These are ordered lists of items, equivalent to arrays or lists in other programming languages. Sequences in YAML are denoted by a dash (-) followed by a space and then the item.
Example:
fruits:
- Apple
- Banana
- Cherry
Detailed Explanation:
Mappings (B) allow you to define relationships between keys and values, making it possible to represent more complex data structures like dictionaries or objects.
Sequences (C) allow you to represent ordered collections, which is important for listing elements that must maintain a specific order.
YAML is often used in configuration files and data serialization in DevOps environments, such as in Ansible playbooks, Kubernetes manifest files, and CI/CD pipeline definitions. Its simplicity and human-readable format make it a popular choice for these applications.
Reference:
YAML Official Documentation: YAML's specification outlines these core data structures.
Juniper Automation and DevOps Documentation: Provides best practices for using YAML in network automation scripts and configuration management.
NEW QUESTION # 46
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