troubleshooting

In a Jinja2 template designed for Junos configuration, how do you correctly output the value of a variable named 'hostname'?

Which PyEZ utility module should you import if you need to upgrade the Junos operating system on a remote device via a Python script?

Your CI/CD pipeline includes a linters step before deployment. Why is running a linter against YAML or Jinja2 template files critical in a Junos automation workflow?

An engineer needs to convert an existing YAML-formatted inventory file into JSON format using a Python script. Which workflow accomplishes this transformation?

You are developing a PyEZ script that loads a configuration snippet onto a Junos device. You want to ensure the configuration is merged with the existing candidate configuration and then committed. Which sequence of PyEZ methods should you use?

An engineer is troubleshooting a script that updates Junos configuration via the REST API. The payload is sent as JSON, but the device returns a 415 Unsupported Media Type error. What is the root cause?

You are writing a Python automation tool that reads telemetry data from a Junos device. The data is received as a JSON string containing forward slashes escaped as '\/'. When you load this string using json.loads(), how does Python handle the escaped slashes?

When troubleshooting REST API authentication and authorization on Junos devices, which THREE log files or diagnostic tools can an administrator inspect? (Choose three)

Which TWO statements are true regarding PyEZ Table and View definitions? (Choose two)

Which THREE mechanisms are valid methods for authenticating and establishing a NETCONF session with a Junos device? (Choose three)

Which THREE advanced features or methods are available on a PyEZ Device instance for session management and inspection? (Choose three)

In the context of network DevOps, what is the purpose of implementing idempotency in automation scripts or playbooks targeting Junos devices?

When using PyEZ to push a configuration, you want to log out all NETCONF XML traffic exchanged between the script and the Junos device for debugging purposes. How do you enable this logging in Python?

An engineer needs to execute a custom Junos RPC (such as 'get-route-information') using the REST API. Which HTTP method and general URI structure should be used?

What is JSNAPy primarily used for in Junos network automation?

Which TWO advantages does structured telemetry and data streaming offer over traditional SNMP polling in Junos automation? (Choose two)

An automation engineer wants to log structured data from a Junos device automation run. The Python script formats a dictionary into a JSON string and prints it. However, the engineer wants all keys sorted alphabetically to ensure consistent log diffing. Which parameter accomplishes this in json.dumps()?

An enterprise network is adopting a CI/CD pipeline for Junos network changes using GitLab CI. A developer wants to ensure that a test job automatically runs whenever a merge request is opened against the main branch. In which configuration file must this pipeline behavior be defined, and what is the primary keyword used to control branch execution?

An automation engineer writes a Python script that reads a Junos configuration exported as JSON and uses json.loads to parse it. The script then searches for a key named "interfaces". The JSON document contains two objects at the same nesting level, each with an "interfaces" key, because the configuration was merged from two sources. What will json.loads produce, and how should the script handle it?

What Jinja2 feature allows you to include the contents of another template file into your main configuration template?

You need to lock the candidate configuration datastore in your NETCONF script to prevent concurrent modifications by other administrators. Which XML element accomplishes this?

When writing a Python script to interact with a Junos device via PyEZ, you receive an object representing RPC output. You want to serialize a custom Python class instance containing device metadata into JSON, but calling json.dumps() raises a TypeError. What is the standard approach to resolve this?

An automation script attempts to connect to the Junos REST API via HTTPS, but the Python script throws an SSL certificate verification error. What is the most appropriate way to resolve this in a development environment while maintaining security best practices?

Which of the following primitive data types is NOT supported natively in JSON?

In a Git repository managing Junos configurations, which TWO files or directories are typically added to the '.gitignore' file to prevent sensitive or temporary files from being tracked? (Choose two)

An automation script needs to compare pre- and post-change states on a Junos device using JSNAPy (Junos Snapshot Administrator). Which configuration file format is used by JSNAPy to define snapshot checks and test assertions?

Which Jinja2 construct is used to define reusable blocks of template code that can be called with arguments like a function?

You need to load a set of configuration changes into the Junos candidate datastore from an inline XML string using NETCONF. Which RPC element is used to load configuration data?

An engineer is comparing how NETCONF and the Junos REST API handle candidate configuration validation. In NETCONF, the client can issue a <validate> RPC. How is configuration validation typically handled in the Junos REST API workflow?

An automation engineer is designing a data model for Junos device inventory that will be serialized to JSON and consumed by multiple tools. The engineer wants to include a null value, a boolean, and a string that contains a colon and a space. Which TWO statements correctly describe JSON serialization rules that apply to this model? (Choose two.)

A DevOps engineer is building a pipeline that uses Junos PyEZ to retrieve operational data from a fleet of Junos devices. The engineer wants to understand which transport protocol PyEZ uses by default and why this matters for firewall rules. Which statement is correct?

An automation scripter needs to load a YAML configuration file in Python. To prevent arbitrary code execution vulnerabilities associated with untrusted files, which function should always be called?

An automation team is designing a script that uses the Junos REST API to manage configurations on a fleet of Junos devices. They need to ensure secure communication and proper error handling. Which two practices should they implement? (Choose two.)

Which THREE features are provided by the Junos REST API daemon (jpagent) when running on a Junos device? (Choose three)

An engineer is designing a Junos automation solution that requires programmatic access to retrieve operational data and configuration from devices. The solution must use a standardized, vendor-neutral protocol that supports capabilities exchange and transactions. Which protocol should be used?

Which TWO characters or sequences are valid in YAML for representing lists or sequences? (Choose two)

Which TWO benefits are provided by implementing automated CI/CD pipelines for Junos network changes? (Choose two)

Which TWO characteristics describe declarative network automation compared to imperative scripting? (Choose two)

Which TWO methods can an administrator use to verify that a Python script successfully established a NETCONF session with a Junos device? (Choose two)

An engineer compares NETCONF and Junos REST API when fetching operational state via RPCs. How does the REST API transmit an RPC request compared to a NETCONF <rpc> wrapper?

An automation engineer writes a Python script that reads a Junos configuration file serialized in JSON. The file opens successfully, but parsing fails with a JSONDecodeError due to trailing commas at the end of object lists. How does standard JSON handle trailing commas compared to YAML?

When converting a deeply nested JSON data structure representing Junos device health metrics into YAML using PyYAML, the output uses complex block styles that are difficult for team members to read. Which parameter in yaml.safe_dump() can force scalar values or containers to prefer flow style (JSON-like curly braces and brackets) instead?

A developer is writing a script that uses the Junos REST API to make configuration changes. The script needs to handle errors gracefully. After sending a load-configuration RPC, the developer receives an HTTP 400 Bad Request response with a JSON body containing an error message. What is the most likely cause of this error?

You are developing a Python script using Junos PyEZ to retrieve and process operational data. You need to handle exceptions that may occur during device interaction. Which two exceptions are raised by PyEZ when a connection or authentication issue occurs? (Choose two.)

When comparing the Junos REST API workflow to the NETCONF protocol workflow, which characteristic is unique to the REST API?

An automation engineer is writing a Python script to parse a Juniper Junos NETCONF reply received in XML format and needs to convert it into a JSON structure for easier manipulation in a web application. Which built-in Python module is primarily used to handle JSON data serialization and deserialization?

An automation engineer uses a Python script to pull interface statistics from a Junos device through the Junos PyEZ Table and View framework. The View definition must map the XML element <name> to the Python attribute interface_name. Which PyEZ View syntax correctly performs this mapping?

Why is it considered a best practice to store sensitive secrets (such as SNMP community strings or API tokens) outside of plaintext Jinja2 templates in a Git repository?

You are writing a Python script that parses a multi-document YAML stream containing Junos device site configurations. One of the documents contains a custom YAML tag. When parsing with yaml.safe_load_all(), how does the safe loader handle custom tags?

Which term describes the practice of continuously building, testing, and validating software or network configurations in an automated pipeline?

Which TWO error response categories or HTTP status codes are commonly returned by the Junos REST API when client requests are malformed or unauthorized? (Choose two)

An automation script reads interface names and VLAN IDs from a CSV file and converts each row into a JSON object before sending it to a Junos device REST API. Which Python module is specifically designed to parse CSV (Comma-Separated Values) files?

You are writing a Python automation script that reads a Junos configuration file in JSON format. The JSON file contains duplicate keys within the same object scope. According to the JSON specification RFC 8259, how should a conforming JSON parser handle duplicate keys?

Which TWO commands or tools are associated with running JSNAPy snapshot verifications from a CLI environment? (Choose two)

You are writing a script that performs multiple configuration changes inside a single PyEZ Config context. How can you verify that the candidate configuration has syntax errors before committing it?

When interacting with Junos devices via NETCONF, which TWO RPC operations are part of standard NETCONF protocol capabilities? (Choose two)

Which Junos configuration statement enables the NETCONF service over SSH for remote automation clients?

An engineer needs to explain the primary advantage of treating network configurations as code in a modern DevOps workflow. Which principle best describes this approach?

An engineer receives a YAML configuration snippet for a PyEZ automation script, but the script fails with a parser error. Upon inspection, the error is caused by improper indentation levels. Which rule must be strictly followed regarding indentation in YAML syntax?

When executing a NETCONF <get-config> request, you specify <source><candidate/></source> but omit any filtering tags. What is returned in the <rpc-reply>?

An automation engineer needs to convert a JSON payload representing Junos interface configurations into equivalent YAML format to reuse in an Ansible playbook. Which fundamental structural relationship between JSON and YAML makes this conversion straightforward?

An automation engineer is reviewing data serialization formats used within Junos automation workflows. Which TWO statements are correct regarding JSON syntax and data types? (Choose two)

Which protocol is natively used by Junos XML management APIs to provide structured, session-oriented configuration and operational data exchange?

During script development, an engineer encounters a YAML file containing comments and multiple configuration documents separated by document markers. Which characters are used to denote the start of a new document within a single YAML file stream?

An administrator issues an edit-config RPC with default-operation="replace" targeting the candidate datastore. What is the impact on the existing configuration on the Junos device?

When designing a version control workflow for Junos configurations using Git, which THREE practices are considered industry best standards? (Choose three)

A network architect is designing a version control strategy for multi-vendor network operations. They need a system that tracks changes to text-based configuration files, allows multiple engineers to work on separate feature branches concurrently, and merges changes systematically. Which category of tool is being utilized?

A Python script retrieves interface statistics from a Junos device in JSON format, modifies a threshold value, and needs to output it back into a formatted JSON string with an indentation level of 4 spaces for readability. Which Python snippet achieves this?

Which user credential validation mechanism does the Junos REST API use by default when authenticating incoming API calls?

You are reviewing a pull request that updates Junos interface configurations using Jinja2 templates. The template contains a conditional statement checking an interface speed variable. What happens if the variable is undefined during template rendering?

Which statement best describes the primary architectural difference between NETCONF and the Junos REST API?

Which TWO actions can be performed using the JSNAPy command-line interface (CLI) tool during network verification workflows?

An automation engineer needs to pretty-print a JSON payload in the Linux terminal for debugging Junos telemetry. Which built-in Python command-line utility can be invoked to validate and pretty-print a JSON file?

An automation engineer wants to verify the syntax of a large YAML playbook before executing it against a production Junos device. Which python one-liner command can be run in the terminal to quickly check if the file is syntactically valid YAML?

An engineer writes a Python script using ncclient to push changes to a Junos device. After sending the configuration via <edit-config>, the script needs to make the changes active without dropping the NETCONF session lock prematurely or requiring a separate explicit commit RPC if candidate workflows are bypassed. However, using standard candidate datastore workflow, what is the exact RPC required to activate the candidate configuration?

A Python automation script extracts routing table entries from a Junos device. The data structure contains deeply nested dictionaries and lists. The engineer needs to perform a deep copy of this deserialized JSON structure before modifying it. Which Python module provides the deepcopy function needed to duplicate nested containers safely?

When writing Python automation scripts for Junos using PyEZ, which THREE objects or methods are commonly used for device interaction and configuration management? (Choose three)

You are writing a PyEZ script that must retrieve interface statistics from a Junos device. You want to use a predefined PyEZ Table to avoid writing custom parsing logic. Which predefined Table should you use to get operational status and statistics for all interfaces?

In a CI/CD pipeline for network changes, what is the role of automated unit testing?

A network automation script is reading a YAML configuration file containing Junos device credentials. The script encounters an unhandled exception when attempting to load the file using PyYAML. Upon inspection, the error is caused by a tab character used for indentation instead of spaces. Which YAML specification rule does this violate?

What is a primary characteristic of a DevOps culture when applied to network operations (NetOps)?

An automation engineer is writing a Python script using Junos PyEZ to connect to a device. Which module and class must be imported to instantiate a device object representing the Junos target?

An engineer executes a NETCONF <discard-changes> RPC. What is the precise effect of this operation on the Junos device?

An automation engineer writes a Python script that loads a YAML file containing Junos device connection parameters. The file includes a line `timeout: 30` and another line `description: 30 seconds`. The script then uses the values in a template. Which statement correctly describes how a standard YAML parser will interpret these two scalar values?

When retrieving configuration data in JSON format from the Junos REST API, how are Junos hierarchical container statements represented in the JSON payload structure?

An engineer executes an HTTP GET request to retrieve interface operational details using the Junos REST API, but receives a 403 Forbidden status code. What is the most likely reason?

You are configuring a CI/CD pipeline for Junos network deployments. The pipeline must validate the syntax of generated candidate configurations against a physical or virtual Junos device before committing them to production. Which stage of the CI/CD pipeline does this validation step represent?

An engineer needs to establish a NETCONF session with a Junos device securely. Which underlying transport protocol does NETCONF use by default according to RFC 6242?

Which TWO of the following are valid scalar values in a YAML document? (Choose two)

Which TWO benefits are gained by using the Junos REST API instead of traditional CLI screen-scraping in automation workflows? (Choose two)

Which of the following valid JSON values represents a boolean true state?

Which command is used in Git to save staged changes to the local repository with a descriptive commit message?

You have captured a baseline snapshot using JSNAPy and want to compare a newly taken snapshot against that baseline. Which JSNAPy command-line action executes this comparison?

A network automation engineer is establishing a NETCONF session with a Junos device. After the SSH connection is established, the device and the client exchange <hello> messages. What is the primary purpose of this exchange?

An automation developer is writing a script to modify candidate configuration data on a Junos device using the REST API. Which HTTP method and request body format should be used to replace an existing configuration hierarchy?

An automation developer is examining a JSON response payload returned by a Juniper device via a REST API call. Which valid JSON data type is used to represent an ordered list of values enclosed within square brackets?

What is the primary templating engine used alongside Python for generating structured Junos configuration text in network automation workflows?

Which file extension is conventionally used for YAML data serialization files?

An engineer is applying a candidate configuration using PyEZ and needs to load it from an external text file named 'interfaces.conf'. Which Config method should be used?

A Python script reads a Junos configuration snippet stored in YAML. The configuration uses YAML anchors and aliases to duplicate common routing policy definitions across multiple VRFs. When the script parses the file using yaml.safe_load(), what happens to the anchors and aliases?

An engineer is building a CI/CD pipeline for Junos device configuration. The pipeline must validate configuration changes before deployment and ensure that only tested configurations are merged into the main branch. Which two practices are essential for achieving this goal? (Choose two.)

Which of the following characters is used to start a comment line in a YAML document?

Which THREE architectural features distinguish the Junos REST API from traditional CLI screen-scraping (CLI automation via expect scripts)? (Choose three)

An automation engineer is writing a script that saves operational telemetry data gathered from a Junos router. The data needs to be written directly to an open file stream in JSON format. Which method from the Python 'json' module should be used?

Which data serialization formats are natively supported by the Junos REST API for both input and output payloads?

An automation script uses the Junos XML API to retrieve interface statistics every 5 minutes. The script uses the <get-interface-information> RPC with the <interface-name> filter for a specific interface. After several successful runs, the script suddenly receives an empty <interface-information> element. What is the most likely cause?

An engineer needs to represent an ordered list of IP addresses in a YAML configuration file for a Junos automation playbook. Which valid YAML syntax correctly defines a sequence of items?

Which TWO statements are true regarding NETCONF locking mechanisms on Junos devices? (Choose two)

Which THREE exceptions can be raised by PyEZ during script execution when interacting with a Junos device? (Choose three)

You are writing a Python automation script that processes JSON output from a Junos device's 'show interfaces' operational command via PyEZ. One of the interface descriptions contains raw control characters. When the script attempts to dump this data to a JSON string using json.dumps(), it raises a ValueError. Which parameter should you pass to json.dumps() to handle non-printable or out-of-range character encoding gracefully?

You are writing a PyEZ script that must connect to a Junos device and run several RPCs, but you need the connection to automatically recover if the NETCONF session drops during a long-running task. Which PyEZ connection parameter should you configure to enable this behavior?

When implementing Jinja2 templates for Junos configuration generation, which THREE features or syntax constructs are natively supported by the Jinja2 engine?

Which Python function deserializes a JSON-formatted string into a native Python dictionary?

An automation script performs a NETCONF transaction that triggers an alarm. You want to retrieve current system alarms using the Junos XML API. Which RPC tag represents this request?

An organization is implementing a Git-based version control strategy for Junos network configurations. Which THREE practices are considered standard DevOps workflows when managing network configurations in Git? (Choose THREE)

An engineer is building a Python application to manage Junos devices. They need to open a NETCONF session, retrieve the device's hostname and model, and handle exceptions if the device is unreachable. Which Junos PyEZ component is designed specifically for establishing the NETCONF session and executing RPCs?

An automation engineer needs to retrieve the operational status of all interfaces from a Junos device using the Junos REST API over HTTPS. The device is configured with the REST API enabled and the engineer has valid credentials. Which HTTP request accomplishes this task?

An automation engineer is writing a Python script that takes a complex nested Python dictionary containing Junos telemetry parameters and converts it into a YAML string. Which PyYAML function should be used?

Which TWO features are supported by YAML but are notably absent in standard JSON? (Choose two)

An automation engineer is using the Junos REST API to manage configuration. The engineer needs to perform a commit that includes a descriptive comment and also synchronizes the commit across both Routing Engines in a dual-RE chassis. Which TWO parameters must be included in the commit RPC request? (Choose two.)

When serializing complex nested Python dictionaries to JSON, which THREE data types will cause a TypeError unless handled by a custom default encoder function? (Choose three)

When writing an automation script that converts data formats between YAML and JSON for Junos configuration pipelines, which THREE potential pitfalls should an engineer account for? (Choose three)

When an automation engineer queries operational data using the Junos REST API, how does the API format the returned structure if the 'Accept: application/json' header is supplied?

An engineer needs to retrieve the entire candidate configuration in JSON format from a Junos device using the Junos REST API. Which HTTP header must be included in the GET request to ensure the response is returned in JSON format?

When designing an automation workflow that uses the Junos REST API for configuration management, which THREE practices ensure robust execution? (Choose three)

Which TWO HTTP response status codes indicate a successful Junos REST API request where data was successfully retrieved or modified? (Choose two)

Which python module is part of the standard library that can be used to parse XML responses returned by NETCONF?

During a NETCONF session with a Junos device, an automation script issues an RPC to load a configuration. The device returns a response containing an <rpc-error> tag. What does this indicate?

A network engineer is establishing a version control workflow for network configurations using Git. Which Git command should the engineer use to stage newly created configuration template files in the local repository working directory so they are included in the next commit?

An automation script reads a configuration template where boolean values are represented as 'yes' and 'no' in YAML. When parsed using PyYAML in Python, how are these values interpreted?

When serializing Python data structures to JSON for Junos automation payloads, which THREE parameters can be passed to json.dumps() to control formatting and readability? (Choose three)

A network engineer is establishing a NETCONF session with a Junos device and needs to lock the candidate configuration to prevent concurrent modifications by other administrators. Which NETCONF operation should be executed?

Which TWO characteristics describe JSNAPy snapshot operations? (Choose two)

Which TWO actions occur during the initial NETCONF session establishment phase between a client and a Junos device? (Choose two)

Which THREE attributes are available within the <edit-config> operation element in NETCONF to specify the modification action on a target node? (Choose three)

An automation engineer needs to include comments explaining complex network parameters inside a Junos automation data file. Which serialization format should the engineer select?

An operations team is applying DevOps principles to network automation on Junos devices. They want to ensure that all changes to device operational states and configurations are treated as disposable and repeatable. Which DevOps practice best describes rebuilding device configurations completely from centralized version-controlled templates rather than performing manual incremental hot-patches?

A DevOps engineer is designing a CI/CD pipeline for validating Junos configuration changes prior to deployment. Which THREE actions are typically performed during the automated CI pipeline 'test' or 'validate' stage? (Choose THREE)

Which statement correctly identifies the relationship between Junos REST API and NETCONF data models?

Which THREE advantages are associated with using the Junos REST API over NETCONF in lightweight automation scripts? (Choose three)

You are writing a Python script to retrieve the operational state of interfaces from a Junos device using NETCONF. Which XML RPC element must be enclosed within the <rpc> tag to request operational data?

You are writing a Python script using the PyEZ library to retrieve interface facts from a Juniper EX Series switch. The resulting data structure is stored in a Python dictionary. You need to dump this dictionary into a YAML file so it can be read by an Ansible playbook later. Which PyYAML function should you use to convert the Python dictionary into a YAML-formatted string or file stream?

A network automation team stores Junos device inventory in JSON. A developer notices that the JSON file contains a field "last_updated": "2024-05-01T12:00:00Z" and wants to compare it against the current time in a Python script. Which statement correctly describes how a standard JSON parser handles this value?

What is the native data format returned by Junos devices when queried via REST API or NETCONF operations configured with JSON output formatting?

Which THREE actions can be performed using the Junos REST API operational endpoints? (Choose three)

When using Jinja2 templates in Python to generate configurations, how can you load a template file from disk prior to rendering it with variables?

An automation engineer is comparing YAML and JSON for storing Junos device configuration data. Which TWO statements accurately describe differences between the two formats? (Choose two.)

When modifying a Junos device configuration using the PyEZ Config table-driven or Context manager (with Config(dev) as cu:), what is the default behavior regarding locking the candidate configuration?

Which THREE principles are foundational to the DevOps movement when applied to network engineering? (Choose three)

You are utilizing PyEZ Table and View abstractions to parse interface statistics. Which base class must your custom Table class inherit from to map to Junos XML output?

Which THREE tasks are typical responsibilities of a network DevOps engineer managing a Junos infrastructure? (Choose three)

You want to run a JSNAPy verification test via Python code. Which Python class should you import and instantiate to execute the snapshot comparison programmatically?

In JSNAPy, what file format is used to define test cases and expected operational states?

Which TWO of the following are valid primitive data types in JSON? (Choose two)

An automation engineer is building a Python script that generates Junos configuration snippets from a JSON payload. The payload contains nested objects representing interfaces, units, and addresses. The engineer uses json.loads and then accesses data['interfaces']['ge-0/0/0']['unit'][0]['family']['inet']['address'][0]['name']. Which JSON structural feature makes this nested access pattern possible?

When comparing error handling between NETCONF and the Junos REST API, how are protocol-level errors communicated back to the client?

An automation engineer is using the Junos XML API to retrieve operational data from a device. The engineer wants to ensure that the response is well-formed XML and includes the Junos namespace so that it can be parsed correctly. Which XML namespace should the engineer expect in the response for Junos-specific operational tags?

You are writing a PyEZ script to retrieve the configured hostname from a Junos device. You want to use the simplest method that returns the hostname as a string without parsing XML manually. Which PyEZ feature should you use?

You are writing a Python script that uses PyEZ to connect to a Junos device. After calling `dev.open()`, you need to verify that the NETCONF session is active before performing operational commands. Which statement correctly checks the connection status and returns a Boolean value?

Which THREE error-tag values defined in NETCONF RFC 6241 may be returned by a Junos device when an edit-config operation fails validation? (Choose three)

Which TWO benefits does NETCONF provide over traditional screen-scraping CLI automation? (Choose two)

Which TWO characteristics are true regarding the Junos REST API? (Choose two)

An automation script makes a REST API request to modify a Junos configuration. To ensure that the changes are validated and committed in a single workflow step without leaving dangling candidate changes, how can the commit parameter be handled?

Which THREE error-type values are defined in the NETCONF protocol specification (RFC 6241) for categorizing <rpc-error> messages? (Choose three)

An automation developer is designing a tool that interacts with multiple network vendors, including Juniper Junos. They evaluate using Junos REST API versus NETCONF. Which workflow advantage does the REST API offer over NETCONF in web-centric application environments?

An automation engineer is using the Junos XML API over SSH to load a configuration snippet into the candidate datastore. The engineer wants to ensure that the configuration is merged with the existing candidate configuration. Which RPC and attribute should be used?

A network automation team is using the Junos REST API to manage configurations on a Junos device. They need to perform a commit operation that includes a commit comment and also synchronizes the commit across all Routing Engines in a dual-RE system. Which HTTP method and URI combination should they use to achieve this with a single request?

A Python script processes a YAML configuration template for Junos BGP neighbors. The configuration contains a multi-line banner string description. Which YAML block scalar indicator preserves newlines exactly as written in the text block?

What is the standard IETF RFC that defines the core NETCONF protocol architecture and operations?

You are writing a Python automation script that processes configuration data. The script reads a YAML file containing Junos firewall filters, modifies them, and writes them back out. However, you notice that all the original comments in the file are stripped out in the output. What is the fundamental reason for this behavior in standard PyYAML dump operations?

You are writing a script that uses PyEZ to load a partial configuration merge. By default, what configuration database mode does the Config utility lock and load into?

When managing Junos configuration changes in a team environment, why is atomic configuration rollback capability crucial during automated deployments?

An automation engineer is tasked with implementing a REST API client that authenticates to a Junos device. The engineer must choose an authentication method supported by the Junos REST API and ensure that credentials are transmitted securely. Which two statements are correct about authentication for the Junos REST API? (Choose two.)

An automation script attempts to load a configuration snippet using NETCONF <edit-config> with operation="delete" on a container statement. What happens if the specified container does not currently exist in the candidate configuration?

What is the purpose of the <hello> element exchanged immediately after establishing a NETCONF SSH session?

What is the primary function of a version control system (VCS) like Git in a Junos automation workflow?

Which THREE distinct operational states or configuration views can be queried using specific Junos XML API RPCs? (Choose three)

In a CI/CD pipeline configured for Junos network changes, which THREE automated testing steps are typically performed before production deployment? (Choose three)

What type of brackets enclose an array in a JSON document?

When an automation script issues a POST request to create a new static route via the Junos REST API, what HTTP status code indicates that the resource was successfully created?

When writing a Python script that connects to multiple Junos devices concurrently using PyEZ, which Python module is commonly used to manage thread pooling and parallel execution?

An automation engineer is writing a Python script using Juniper PyEZ to connect to a Junos device. Which context manager approach is best practice to ensure the Device session is properly closed even if an exception occurs?

Which transport protocol is mandated by RFC 6241 as the standard secure connection mechanism for NETCONF when operating in typical Junos enterprise automation environments?

When executing a configuration change via the Junos REST API, what is the role of the HTTP DELETE method?

A network automation team is using the Junos REST API to manage configurations on a fleet of Junos devices. They need to ensure that configuration changes are applied atomically and that they can roll back if an error occurs. They decide to use the REST API to load a configuration, commit it, and then verify the commit. Which sequence of REST API calls should they use to load a configuration snippet, commit it, and then confirm the commit was successful?

In a Junos NETCONF automation workflow, what happens during a lock operation on the configuration database? (Choose two)

You are writing a script that parses NETCONF responses from Junos. You encounter an element named <ok/> inside an <rpc-reply>. What does this indicate?

Which TWO tools or platforms are commonly used for version control and hosting of Junos automation code repositories? (Choose two)

A network team uses a CI/CD pipeline to manage Junos device configurations. After a developer merges a change to the main branch, the pipeline is triggered automatically. Which DevOps principle is primarily demonstrated when the pipeline deploys the tested configuration to production devices without manual intervention?

When using Jinja2 inheritance, which tag is placed in a base template to indicate where child templates can insert their custom content?

An automation engineer is writing a Python script that retrieves the operational status of all interfaces from a Junos device using the Junos REST API. The script sends a GET request to https://device/rest/interface. The device returns an HTTP 200 OK response, but the response body is empty. The engineer examines the request and confirms that the URL is correct and the device is reachable. Which action should the engineer take to retrieve the interface status information?

An automation engineer uses a Python script with the PyEZ library to retrieve interface statistics from a Junos device and wants to store the results in a file that preserves data types such as integers, booleans, and null values for later processing by another tool. The engineer needs a serialization format that is compact, widely supported by APIs, and preserves these primitive types. Which format should the engineer choose?

An engineer is using Junos PyEZ to load a configuration change onto a device. The script uses the Config class to lock the candidate configuration, load a set of changes, and then commit. During testing, the commit fails because another user has an exclusive lock on the configuration. What is the correct behavior of the engineer's script when it attempts to lock the configuration in this situation?

You are using PyEZ to retrieve the operational status of all interfaces on a Junos device. You want to get the output in a structured Python dictionary rather than raw XML. Which method should you use on the Device object?

A network automation developer is writing a Python script that uses the Junos REST API to load a candidate configuration from a file and commit it. The developer wants to ensure the configuration is merged with the existing candidate configuration. Which HTTP method and endpoint should be used to load the configuration?

An automation script attempts to unlock a candidate configuration datastore that was previously locked by a different NETCONF session. Which RPC is required to force-terminate that session and release the lock?

Which of the following describes the fundamental structural difference between JSON and YAML regarding syntax design?

Which TWO tasks are typically automated using Python and PyEZ in a network DevOps pipeline? (Choose two)

An automation engineer is troubleshooting a Junos REST API script that intermittently fails with HTTP 401 Unauthorized errors when retrieving operational data. The script uses HTTP Basic Authentication with a valid username and password. The engineer confirms that the credentials are correct and that the REST API is enabled. What is the most likely cause of the intermittent failures?

Which TWO file formats are commonly used for structuring network configuration data and automation templates in Junos DevOps pipelines? (Choose two)

An engineer writes a Python script that loads a JSON configuration file using the json.load() method. The file contains configuration parameters for a Junos device. If the JSON file contains a trailing comma at the end of the last element in an array, what will happen when the script executes?

A Python script using PyEZ loads a configuration from a file and commits it on a Junos device. The commit fails with a `CommitError` exception. You need to retrieve the specific error message returned by the device. Which method or attribute should you use to obtain the detailed error text?

You are writing a Python script that converts a Junos operational state output from XML (via NETCONF) into JSON. The XML structure contains sibling elements with the same tag name. When converted naively, how do standard XML-to-JSON conversion libraries (like xmltodict) typically represent these repeated sibling elements in the resulting JSON dictionary?

An automation engineer needs to parse a JSON payload returned by the Junos REST API that contains a list of interfaces, each with a name and a list of addresses. The engineer wants to iterate over the interfaces and then over each interface's addresses in Python. Which Python data structure mapping does the `json` module produce for this payload?

A network automation team is evaluating Junos PyEZ for managing a fleet of Junos devices. They want to understand which capabilities PyEZ provides natively. (Choose two.)

In a Junos automation environment, what role does a schema (such as YANG or Junos XSD) play when interacting with NETCONF?

What is the role of the <rpc> element in a NETCONF message exchange?

You are writing a script that uses Jinja2 to dynamically render a Junos interface configuration. Which Python module and function are required to load a template from the local filesystem and render it with a dictionary of variables?

While executing a NETCONF edit-config operation, you want to ensure that any syntax errors or invalid statements immediately cause the device to roll back the entire transaction without applying partial changes. Which parameter achieves this?

When using the Junos REST API to configure static routes, how does the JSON payload structure represent list items that can have multiple instances (such as multiple next-hops or static routes)?

You are using the PyEZ SW utility to install a new Junos image on a device. Which method parameter allows the script to automatically reboot the device after a successful installation?

Which TWO methods are provided by the Python standard library 'json' module for deserializing JSON data? (Choose two)

You are developing a Python script using PyEZ to load a configuration onto a Junos device. You need to ensure that the configuration is merged with the existing candidate configuration, and that the load operation does not perform a commit check automatically. Which method should you use to load the configuration from a file?

A network engineer is using Git for version control of Junos configurations. During a peer review on a pull request, a merge conflict arises because two engineers modified the same interface description line in different branches. What is the correct procedure to resolve this conflict in Git?

An automation engineer is using the Junos XML API over NETCONF to load a configuration change into the candidate datastore. The engineer wants to ensure that the change is committed automatically only if the candidate configuration passes a validation check. Which NETCONF operation should the engineer use to validate the candidate configuration before committing?

A network automation engineer is using the Junos XML API over NETCONF to make configuration changes. The engineer wants to ensure that if the commit fails, the candidate configuration is automatically rolled back to its previous state without manual intervention. Which NETCONF operation should the engineer use to achieve this?

You are writing a Python script to retrieve interface statistics from a Junos device using the REST API. You use HTTP Basic Authentication. Which HTTP header must be included to pass the encoded credentials correctly?

What is the primary benefit of decoupling network configuration data (YAML/JSON) from presentation templates (Jinja2) in network automation?

A network engineer writes a Python script using Junos PyEZ to push a configuration change. The script uses the ConfigTable or Config class. What mechanism does PyEZ use under the hood to ensure the configuration lock is released even if the script encounters an unhandled exception?

Which TWO of the following are valid ways to instantiate a PyEZ Device object in Python, providing connection parameters? (Choose two)

A network engineer is designing a new automation workflow for Junos devices and wants to understand how the Junos automation stack separates its responsibilities. Which statement accurately describes the role of the Junos management daemon (mgd) in this stack?

Which Junos automation toolset relies heavily on XML over NETCONF and provides robust Python libraries tailored specifically for Junos network devices?

An automation engineer wants to retrieve information about all software packages installed on a Junos device using the REST API. Which operational RPC endpoint category is typically targeted?

Which TWO data serialization formats can an automation engineer request using the 'Accept' header in a Junos REST API GET request? (Choose two)

Which TWO characteristics distinguish the Junos REST API from NETCONF when interacting with Junos devices? (Choose two)

In a Python script utilizing PyEZ, what method must be called on the Device instance after all configuration and operational tasks are complete to properly terminate the NETCONF session?

What is the primary benefit of using PyEZ Table and View abstractions over raw RPC XML parsing in Python scripts?

When using NETCONF to edit a Junos configuration, you include the attribute operation="create" on an existing configuration leaf. What behavior does the device exhibit?

Which character is used to indicate a mapping key-value pair in YAML syntax?

Which TWO Python standard library modules are commonly combined when a script needs to fetch web content (such as Junos REST API data) and parse the resulting payload? (Choose two)

An automation script executes a NETCONF <get-config> query with a specific subtree filter for interface statistics. However, the response contains configuration data instead of operational statistics. Why did this occur?

You need to execute a custom remote procedure call (RPC) in PyEZ to retrieve the Ethernet switching table. The tag in Junos XML API is get-ethernet-switching-table-information. How should you write this method call in Python?

Which tool or library is commonly used in Python to simplify interacting with Junos NETCONF APIs by abstracting low-level XML handling?

Which TWO components are essential parts of a model-driven network automation architecture on Junos devices? (Choose two)

Which NETCONF RPC tag is used to gracefully terminate an active NETCONF session with a Junos device?

Which TWO benefits are gained by applying DevOps principles to Junos network management? (Choose two)

An automation engineer is designing a deployment strategy for Junos devices using Git branches. Which branching strategy model aligns best with continuous delivery where feature branches are merged frequently into a shared integration branch that automatically triggers staging tests?

You are writing a PyEZ script that needs to handle exceptions when connecting to a Junos device and executing RPCs. Which TWO exceptions are raised by PyEZ when authentication fails or when the device is unreachable? (Choose two.)

Which TWO benefits are gained by using Python virtual environments when developing PyEZ and Jinja2 automation scripts? (Choose two)

When executing a configuration commit in Junos via NETCONF, which TWO commit parameters or modifiers can be specified in the RPC? (Choose two)

An automation developer is designing a script that reads routing policy parameters from a configuration file. Which TWO data formats are natively supported and commonly used across Junos automation toolchains like PyEZ, Ansible, and REST APIs for data serialization? (Choose two)

Which XML tag encapsulates the entire response returned by a Junos device in reply to a valid NETCONF RPC request?

A Python automation script parses a Junos telemetry stream in JSON. The JSON payload uses integer keys in a dictionary (e.g., {443: 'HTTPS'}). When loaded into Python using json.loads(), what data type do the dictionary keys become?

When developing Python scripts that utilize PyEZ and Jinja2, which THREE best practices ensure robust and maintainable automation code? (Choose three)

When executing an RPC call in PyEZ, what format is typically returned by default if you do not parse it into another structure?

An automation engineer is designing a Python script that converts Junos device configuration data between JSON and YAML formats. The script must correctly handle data types to avoid misconfiguration. Which TWO statements about JSON and YAML data type handling are correct? (Choose two.)

A network automation engineer is writing a Python script using the Junos PyEZ library to retrieve operational state from a QFX Series switch. The script needs to retrieve interface statistics using an RPC instead of raw CLI text parsing. Which PyEZ method should the engineer execute to invoke the 'get-interface-information' RPC and receive the structured XML response?

Which of the following data types is natively supported in JSON without requiring custom serialization handlers?

A network automation engineer is using a Python script with the PyYAML library to load a YAML file that defines a Junos device's configuration. The script needs to ensure that the loaded data is a Python dictionary and that no arbitrary Python objects are instantiated during parsing. Which function should the engineer use to safely load the YAML content?

A network automation engineer is utilizing the Junos PyEZ library in Python to manage device configurations. Which THREE methods or classes are part of the core Junos PyEZ library functionality? (Choose THREE)

You are writing a Python script using PyEZ to retrieve and process operational data from a Junos device. Which TWO statements correctly describe the use of PyEZ Table and View for parsing operational data? (Choose two.)

An automation engineer is designing a Junos network automation workflow and needs to select the component of the Junos automation architecture responsible for parsing XML and JSONRPC client requests and interacting directly with the Junos kernel and daemons. Which component fulfills this role?

A network automation team is using Junos PyEZ to retrieve interface statistics from a device. They need to ensure that the script can handle multiple devices concurrently and that each device connection is properly closed after the operation. Which approach should they take?

An engineer applies a configuration change using NETCONF with <edit-config> and specifies default-operation="replace" at the top level, but includes an element with operation="merge". How does Junos evaluate this?

An administrator configures the Junos REST API service. By default, which TCP port does the device listen on for secure HTTPS REST requests?

What is the primary benefit of using structured data formats (such as XML, JSON, or YAML) over unstructured CLI text output in Junos automation?

Which Junos configuration hierarchy is used to configure system services parameters related to the REST API agent?

Which THREE statements correctly contrast the session handling of NETCONF versus the Junos REST API? (Choose three)

You are configuring a webhook in your version control system to trigger an automated CI/CD pipeline whenever a developer pushes a configuration commit to the main branch of your Junos automation repository. What security mechanism should be implemented on the receiving pipeline webhook endpoint?

Which TWO of the following are valid extensions commonly used for YAML files? (Choose two)

In a DevOps pipeline managing Junos devices, an engineer implements 'Infrastructure as Code' (IaC). Which practice best exemplifies this methodology when applied to Junos routing policies?

When writing a Python script to interact with Junos devices, you want to ensure that password credentials are not hardcoded in the source code. What is a recommended best practice supported by PyEZ?

You send an edit-config RPC with an invalid XML tag name. What is the standard structure of the error returned in the <rpc-reply>?

Which TWO statements are true regarding the NETCONF protocol hello message exchange? (Choose two.)

When establishing a NETCONF session over SSH, which standard capability announcement is exchanged during the initial hello message phase?

An automation engineer is writing a Python script that uses the ncclient library to connect to a Junos device via NETCONF. The engineer wants to retrieve the entire candidate configuration from the device. Which NETCONF operation should be used?

You are automating the retrieval of operational data from a Junos device using PyEZ. You write a Python script that calls the RPC method `get_interface_information` with the argument `terse=True` on a `Device` object. The script executes successfully, but the returned XML contains only a subset of interface details, missing fields like `admin-status` and `oper-status`. You need the full operational status for each interface. What should you do to obtain the complete data?

In Git version control, which TWO commands are used to integrate changes from one branch into another? (Choose two)

You are writing a Python script to gather operational state information from a Junos device using PyEZ. Which method should you call on an open Device instance to retrieve standard hardware and OS inventory facts into a dictionary?

An automation script needs to check if a Junos device supports a specific feature before executing an RPC. Which PyEZ property can be checked to inspect the software version loaded on the device?

Which THREE HTTP methods are commonly used within the Junos REST API for managing configuration and operational resources? (Choose three)

Which Python module is part of the standard library and provides functions to serialize and deserialize JSON data?

An automation engineer stores Junos interface descriptions in a YAML file. One description includes the text 'Link: 10G uplink to core-sw-01'. After loading the file with a standard YAML parser, the engineer finds the value is not parsed as expected. Which YAML syntax should the engineer use to store this value correctly?