200-901 Cisco DevNet Associate (DEVASC) Free Practice Exam Questions (2025 Updated)

Bandwidth is the network constraint that affects the performance of an application as the number of users accessing the application increases. Bandwidth refers to the maximum rate of data transfer across a network path. If the bandwidth is insufficient to handle the increased traffic, the application performance will degrade, leading to slower response times and potential timeouts.

References:

Cisco DevNet Documentation - Network Performance

Cisco DevNet Associate Certification Guide

HTTP status codes in the 300 range are related to redirection. These codes indicate that the requested resource has been moved to a different URL, and the client should use the new URL provided in the response. Common examples include 301 (Moved Permanently) and 302 (Found).

The Bash script provided in the exhibit performs two find commands:

find /home/user/backup -mtime +30 -type f -print: This command searches for files in the /home/user/backup directory that have been modified more than 30 days ago and prints their names.

find /home/user/backup -mtime +30 -type f -delete: This command searches for files in the /home/user/backup directory that have been modified more than 30 days ago and deletes them.

Thus, the workflow being automated by this Bash script is the deletion of backup files that are older than 30 days.

References:

GNU find Documentation

Cisco DevNet Associate Certification Guide

The provided script sends a POST request to the Meraki API endpoint to add a new media server for monitoring. The payload includes the name and address of the media server, indicating that the action being automated is the addition of a media server to the monitoring list.

Virtual machines (VMs) provide the flexibility and capabilities required to meet the described requirements. VMs can easily migrate between data centers, save and restore their state, and support various operating systems and GUIs.

Migration: VMs can be moved from one physical server or data center to another, providing high flexibility in resource management.

State Saving: VMs support saving the operational state (snapshots), allowing quick recovery or migration.

Support for GUIs: VMs can run different operating systems, including those with graphical user interfaces (GUIs) like Windows and Linux.

Hardware Utilization: VMs enable better utilization of hardware resources by running multiple VMs on a single physical host.

References:

Virtual Machines Overview: VMware VMs

When dealing with data formats in Python:

JSON:

Arrays convert to Lists: In JSON, arrays are represented as lists in Python.

Objects convert to Dictionaries: JSON objects are represented as dictionaries in Python.

YAML:

Lists become Lists: In YAML, lists are directly mapped to lists in Python.

Objects become Dictionaries: YAML objects are directly mapped to dictionaries in Python.

References:

JSON and YAML in Python: JSON Documentation, YAML Documentation

The YANG model provided in the exhibit defines the structure for interface information, including fields for name, admin-status, if-index, and statistics. The correct XML snippet must match this structure and use the appropriate namespaces and field names as defined in the YANG model.

Namespace: The XML must include the namespace urn:ietf:params:xml:ns:yang:ietf-interfaces and the prefix if.

Interface Information: The XML must include elements for name, admin-status, if-index, and statistics as defined in the YANG model.

Field Names and Values: The field names must match the YANG model (admin-status, if-index, in-octets, in-unicast-pkts).

Option D is the correct XML snippet because it accurately conforms to the YANG model. It includes the required elements and correctly uses the namespace and field names:

GigabitEthernet1

1

1

408164820

728061

Rate limiting, as explained previously, is essential to ensure that an application can handle traffic spikes without crashing. By limiting the rate at which requests are processed, the application can maintain stability and reliability under varying load conditions.

Traffic Spike Management: Rate limiting helps manage unexpected surges in traffic by capping the number of allowable requests within a specified period.

Reliability Maintenance: By preventing overloading, rate limiting ensures that the application remains operational and responsive, maintaining its reliability.

References:

Managing Traffic Spikes with Rate Limiting: Rate Limiting Strategies

When writing applications, using classes over functions offers several benefits, including improved readability and better code organization. Here are the detailed explanations for these two benefits:

Improved Readability (A):

Classes allow for encapsulation, which means grouping related data and functions (methods) together. This makes the code more readable and easier to understand because the related functionality is bundled in a single, self-contained unit.

Object-Oriented Programming (OOP) principles such as inheritance and polymorphism further enhance readability by reducing code duplication and promoting code reuse.

Code Organization (E):

Classes provide a clear structure for organizing code. They help in logically grouping related functionalities, which enhances the modularity of the application. This organization makes it easier to manage and maintain the codebase, especially as the application grows in complexity.

By using classes, developers can create blueprints for objects, making it easier to implement and manage complex systems with multiple interconnected components.

Classes are fundamental to Object-Oriented Programming, which is a paradigm that many modern programming languages, including Python and Java, are built around. While functions are essential for specific tasks and operations, classes provide a higher level of abstraction and organization.

References:

Cisco DevNet Associate Certification Guide

Python Documentation - Classes

Java Documentation - Classes and Objects

The script provided in the exhibit shows the following steps:

It configures a loopback interface (interface loopback 5; no shut).

It retrieves the interface details and parses the JSON output to list interfaces that are up.

Therefore, the correct answers are: A. Configure interface loopback 5. C. Show only the interfaces in the up status.

A default gateway serves as an access point or IP router that a networked computer uses to send information to a computer in another network or the internet. It is essentially the forwarding node that routes traffic from a local network to other networks. When an IP packet's destination is not within the local network and no specific route is defined in the routing table, the packet is sent to the default gateway.

The YANG structure shown defines a leaf IPPeer that can be either an IPv4 address or an IPv6 address. The third JSON example correctly represents this union type by using an array with both possible types included:

"IPPeer": [

"10.1.1.1",

"2001:db::1"

]

}

This correctly reflects the YANG definition, where IPPeer can be either type specified in the union.

References:

YANG - Data Modeling Language

Cisco YANG Models

1 – E, 2 – B, 3 – D, 4 – A

The Python script provided makes a GET request to the Cisco DNA Center API to retrieve a list of network devices. The script processes the JSON response, iterates over each item in the response, and prints the hostname and management IP address of each device.

The process_devices function constructs the API URL using the dnac['host'].

It sends an HTTP GET request with the necessary headers, including the authentication token.

The response is parsed as JSON and stored in the data variable.

The script then loops through the data['response'] list, printing the hostname and managementIpAddress for each device.

 Understand the JSON Structure: The JSON data given in the exhibit consists of an array of objects. Each object has a type and an items key. The items key contains an array of objects, each with a color and another items key, which is an array of strings representing items of that color.

 Analyze the Python Code: The Python code provided is:

print(filter(lambda l: l['type'] == 'fruit', vegetables)[0]['items'][0]['items'][0])

Break Down the Code:

filter(lambda l: l['type'] == 'fruit', vegetables): This line filters the JSON array vegetables to include only objects where the type is 'fruit'.

filter(...)[0]: After filtering, this selects the first object in the filtered list, which is the fruit object.

['items'][0]: This accesses the first item in the items array of the fruit object. In this case, it refers to the object where color is "green".

['items'][0]: This accesses the first item in the items array of the green object, which is "kiwi".

Evaluate the Code:

The first object of type fruit in the JSON is found.

The first item in the items array for fruit with the color green is selected.

The first item in this nested items array is "kiwi".

Therefore, the output of the given Python command is "Kiwi".

References:

Python documentation on filter: Python Docs - Filter

JSON structure understanding from DevNet Associate study materials on API interactions and data parsing.