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Question 161.

Which protocol provides model-driven device management over SSH?

1. SCP
2. NTP
3. DHCP
4. NETCONF

Correct Answer: 4

Explanation:

NETCONF is a network management protocol designed for programmatic configuration and retrieval of device data. It commonly operates over SSH and uses structured data models, often defined with YANG. This makes NETCONF useful for automation workflows that need predictable configuration and operational data rather than relying on screen-scraping CLI output. SCP transfers files, NTP synchronizes clocks, and DHCP provides address configuration. NETCONF also supports operations such as retrieving configuration, editing configuration, and working with supported datastores. Its structured approach makes it suitable for model-driven network automation.

Question 162.

Which Python object can store multiple network device names?

1. Boolean
2. List
3. Integer
4. Float

Correct Answer: 2

Explanation:

A Python list can store multiple values in an ordered collection and is frequently used in automation scripts. A list could contain device hostnames, management addresses, interface identifiers, or task results. Lists can also be iterated with loops, allowing one automation routine to process many devices without duplicating code. Boolean values represent true or false conditions, integers represent whole numbers, and floats represent decimal numbers. Choosing an appropriate collection structure is important when automation needs to maintain and process groups of network resources.

Question 163.

Which HTTP status indicates a server-side processing failure?

1. 500
2. 201
3. 204
4. 304

Correct Answer: 1

Explanation:

HTTP status code 500 represents an internal server error and generally indicates that the server encountered an unexpected condition while processing the request. In network automation, a controller API might return a 500 response because of an internal application problem or unexpected backend failure. Automation code should distinguish this from client-side errors such as invalid requests or authentication problems. Status 201 indicates successful resource creation, 204 indicates successful processing without response content, and 304 indicates that a cached representation has not changed. Appropriate error handling helps automation respond safely to server failures.

Question 164.

Which Ansible component stores reusable variable values?

1. Handler
2. Task
3. Vars
4. Module

Correct Answer: 3

Explanation:

Ansible variables store values that can be reused throughout automation workflows. They can represent device-specific information, interface parameters, credentials references, environment settings, or other values needed by tasks and templates. Variables can be defined at different scopes depending on the project’s structure. Tasks describe actions, handlers respond to notifications, and modules provide functionality executed by Ansible. Proper variable organization allows the same automation logic to operate across different devices without hard-coding every value. This separation between logic and data improves maintainability and reuse.

Question 165.

Which Python module converts JSON text into Python objects?

1. json
2. random
3. math
4. calendar

Correct Answer: 1

Explanation:

Python’s json module provides functions for encoding and decoding JSON data. The json.loads() function converts a JSON-formatted string into corresponding Python objects such as dictionaries and lists. This is particularly useful when network automation receives structured responses from REST APIs. Once decoded, the script can inspect fields, evaluate values, or pass information to another workflow stage. The random, math, and calendar modules provide unrelated functionality. Understanding JSON serialization and deserialization is fundamental when integrating Python automation with controller APIs and other web services.

Question 166.

What does a NETCONF edit-config operation perform?

1. Reads interface counters
2. Modifies configuration
3. Resolves DNS records
4. Captures packets

Correct Answer: 2

Explanation:

The NETCONF edit-config operation is used to modify configuration data in a specified datastore. An automation client can use it to create, modify, or delete supported configuration elements according to the device’s YANG models and NETCONF capabilities. This provides a structured alternative to sending CLI commands. Reading interface counters is an operational monitoring activity, DNS resolution maps names to addresses, and packet capture analyzes network traffic. Automation should carefully construct and validate edit-config payloads because configuration changes can directly affect device behavior.

Question 167.

Which Ansible feature triggers a task after a change?

1. Inventory
2. Handler
3. Fact
4. Filter

Correct Answer: 2

Explanation:

Ansible handlers are tasks that execute when they receive a notification from another task. They are commonly used for actions that should occur only after a related configuration change, such as restarting or reloading a service. This avoids performing the follow-up action unnecessarily when the configuration was already correct. Inventory defines managed hosts, facts provide discovered information, and filters transform values within expressions. Handlers are therefore useful for event-like behavior within playbooks and help keep automation efficient by responding specifically to changes.

Question 168.

Which API mechanism commonly identifies a specific resource?

1. URI
2. VLAN
3. MAC table
4. Routing metric

Correct Answer: 1

Explanation:

A URI, or Uniform Resource Identifier, can identify a particular resource within an API. RESTful interfaces commonly use structured URIs to represent objects such as devices, interfaces, policies, or sites. The client then uses an HTTP method and possibly additional parameters to perform the required operation against that resource. VLANs and routing metrics are networking concepts, while a MAC table contains forwarding information. Understanding resource identification is important when developing automation because the correct URI determines which object an API request targets.

Question 169.

Which Python capability processes items one at a time lazily?

1. Decorators
2. Classes
3. Generators
4. Exceptions

Correct Answer: 3

Explanation:

Python generators produce values lazily, meaning they can generate one item at a time rather than creating an entire collection in memory immediately. This can be valuable in network automation when processing large inventories, telemetry records, API results, or command outputs. The yield statement is commonly used to create generator functions. Generators can reduce memory consumption and allow workflows to begin processing results before the complete dataset is available. Decorators modify function behavior, classes define object structures, and exceptions handle runtime errors.

Question 170.

Which method commonly creates a new REST resource?

1. HEAD
2. OPTIONS
3. POST
4. TRACE

Correct Answer: 3

Explanation:

HTTP POST is commonly used to create a new resource in REST-style APIs. A network automation script might use POST to create a device record, policy object, site definition, or other controller-managed resource. The API may return information about the created object, often including an identifier or resource location. HEAD retrieves response headers without the normal response body, OPTIONS describes supported communication options, and TRACE is used for diagnostic request tracing. API-specific documentation should always be followed because individual platforms may define additional action-oriented POST operations.

Question 171.

Which practice helps prevent accidental credential exposure in logs?

1. Secret masking
2. Packet flooding
3. Route filtering
4. Interface shutdown

Correct Answer: 1

Explanation:

Secret masking prevents sensitive values such as passwords, tokens, and private keys from appearing directly in application logs. Automation systems should avoid logging credentials altogether when possible and should redact sensitive fields if they could appear in error messages or API responses. This is especially important because logs may be stored centrally and accessed by many operational systems or users. Packet flooding, route filtering, and interface shutdown address unrelated network functions. Secure logging should combine masking with appropriate access controls, retention policies, and careful handling of diagnostic output.

Question 172.

Which network automation principle minimizes manual repetition?

1. Fragmentation
2. Automation
3. Encapsulation
4. Broadcast

Correct Answer: 2

Explanation:

Automation reduces repetitive manual work by allowing software to perform standardized tasks consistently. In network environments, automation can handle activities such as configuration deployment, inventory collection, compliance checks, validation, and operational reporting. Instead of manually entering similar commands on many devices, an automation workflow can apply defined logic across a selected device group. Encapsulation is a software design concept, fragmentation concerns packet or data division, and broadcast describes network communication behavior. Reducing repetitive manual activity can also improve consistency and make large-scale operations more manageable.

Question 173.

Which data structure maps unique keys to associated values?

1. Set
2. Tuple
3. Dictionary
4. Range

Correct Answer: 3

Explanation:

A Python dictionary maps keys to associated values and is well suited for structured network information. For example, an automation script could associate a device hostname with its management address or map an interface name to configuration attributes. Keys are used to retrieve corresponding values efficiently. Sets contain unique elements, tuples provide ordered immutable collections, and ranges represent sequences of numbers. Dictionaries are especially useful when processing JSON API responses because JSON objects naturally map into Python dictionaries after decoding.

Question 174.

Which HTTP status commonly represents successful deletion without content?

1. 201
2. 302
3. 204
4. 401

Correct Answer: 3

Explanation:

HTTP 204 No Content indicates that a request was successfully processed and that the server has no response body to return. APIs may use 204 after successfully deleting a resource or completing an update that does not require response content. Automation clients should recognize 204 as a successful result rather than treating the absence of a body as an error. Status 201 generally indicates resource creation, 302 indicates redirection, and 401 indicates an authentication issue. Correct response handling prevents successful API operations from being incorrectly reported as failures.

Question 175.

Which mechanism provides secure API communication over HTTP?

1. TLS
2. ARP
3. ICMP
4. STP

Correct Answer: 1

Explanation:

TLS provides encryption and authentication for secure HTTP communication. When HTTP operates over TLS, it is commonly referred to as HTTPS. Network automation scripts interacting with controller APIs should use secure transport whenever supported to protect credentials, tokens, configuration information, and other sensitive data while in transit. ARP resolves local network addresses, ICMP supports diagnostic messaging, and STP prevents Layer 2 switching loops. TLS also helps verify the identity of the remote service through certificates, although certificate validation must be configured correctly.

Question 176.

Which Git command retrieves remote repository updates?

1. git reset
2. git fetch
3. git tag
4. git clean

Correct Answer: 2

Explanation:

The git fetch command retrieves updates from a remote repository without automatically merging those changes into the current working branch. This allows automation developers to inspect incoming commits before deciding how to integrate them. For network automation projects, fetching remote changes can help teams review updated scripts, templates, or test definitions while maintaining control over local integration. git reset changes repository state, git tag manages named references, and git clean removes untracked files. Fetching is therefore useful for controlled collaboration and change review.

Question 177.

Which concept separates automation logic from device-specific values?

1. Hard coding
2. Variable abstraction
3. Manual entry
4. Static commands

Correct Answer: 2

Explanation:

Variable abstraction separates reusable automation logic from values that differ between devices or environments. Instead of embedding individual addresses, interface names, credentials references, or policy values directly into code, an automation workflow can obtain them from variables or external data sources. This allows the same logic to operate across multiple targets with different parameters. Hard-coded values reduce flexibility and make maintenance more difficult. Separating data from logic also supports testing because the same workflow can be exercised with different controlled inputs.

Question 178.

Which API technique reduces unnecessary response processing?

1. Data filtering
2. Cable testing
3. Route poisoning
4. Clock adjustment

Correct Answer: 1

Explanation:

API data filtering allows a client to request or process only information relevant to its task when the API provides filtering capabilities. This can reduce response size, parsing work, memory consumption, and unnecessary network traffic. For example, an automation workflow may request only devices belonging to a particular site or only interfaces matching a specific condition. Cable testing, route poisoning, and clock adjustment have different networking purposes. Efficient filtering is especially helpful when automation interacts with large inventories or APIs containing substantial amounts of operational data.

Question 179.

Which approach executes independent automation tasks concurrently?

1. Serialization
2. Sequential processing
3. Concurrency
4. Manual batching

Correct Answer: 3

Explanation:

Concurrency allows multiple independent operations to make progress during overlapping periods rather than requiring every task to finish before another begins. This can benefit network automation when many independent API calls or device operations involve waiting for network responses. Proper concurrency design can improve throughput, although it should account for device capacity, API limits, connection limits, and ordering dependencies. Serialization intentionally processes data or operations in a controlled sequence, sequential processing handles tasks one after another, and manual batching depends on human coordination.

Question 180.

Which document records an automation project’s required Python packages?

1. README
2. requirements.txt
3. changelog.txt
4. topology.json

Correct Answer: 2

Explanation:

A requirements.txt file commonly lists Python packages and, when needed, their versions for a project. This allows developers and deployment systems to install the dependencies required by an automation application. Maintaining dependencies in a dedicated file improves reproducibility because different environments can install a consistent set of packages. A README generally provides project documentation, a changelog records notable changes, and a topology file would represent network information rather than Python dependencies. Proper dependency management is important when automation applications move between development, testing, and production environments.