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Cisco Certified DevNet Associate
200-901
DevNet Associate (DEVASC) Questions and Answers

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Viewing page 9 out of 14 pages

Viewing questions 81-90 out of questions

Questions # 81:

What is a principle of a code review process?

Options:

Changes are made after the code is submitted to source control.

It must not prevent code from getting into production as quickly as possible.

Naming standards must be consistent.

A technical lead must sign off on the review.

Answer

Explanation

One of the key principles of a code review process is to ensure that naming standards are consistent. This helps maintain code readability, understandability, and maintainability. Consistent naming conventions reduce the cognitive load for developers when reading and understanding the code, making it easier to manage and less prone to errors.

References:

Atlassian - Code Review Best Practices

Cisco DevNet Associate Certification Guide

Questions # 82:

What is the purpose of running tests before writing code in test-driven development?

Options:

to find unexpected failures in the tests

to demonstrate that the tests fail for expected reasons

to ensure that the tests pass

to provide proof of the work carried out

Answer

Explanation

In Test-Driven Development (TDD), the process starts with writing tests before writing the actual code. The primary purpose of running tests before writing the code is to ensure that the tests fail initially. This failure demonstrates that the tests are correctly identifying the absence of the desired functionality or the presence of bugs. Once the tests are verified to fail for the expected reasons, the developer then writes the minimal code necessary to pass the tests, ensuring that the new functionality works as intended and that the codebase is continuously tested.

References:

Test-Driven Development by Example

Cisco DevNet Associate Certification Guide

Questions # 83:

Refer to the exhibit.

Question # 83

An engineer sends the request to collect data over Cisco AMP for Endpoints API. The Engineer must list guide and hostname data for all computers, but the first request returns only 500 items out of 2,000. Then, the engineer adds the loop to collect all the data. What must be added to the script where the code is missing to complete the requests?

Question # 83

Options:

Option A

Option B

Option C

Option D

Answer

Explanation

To complete the requests and retrieve all the data, the correct code that needs to be added is next_url = response_json['metadata']['links']['next']. This ensures that the script retrieves the URL for the next set of data from the 'links' object within the 'metadata' section of the JSON response. This allows the loop to continue until all data is collected.

[Reference: Cisco DevNet Associate documentation on working with APIs and handling paginated responses., ]

Questions # 84:

Which technology is responsible for matching a name to an IP address of an application running on a host?

Options:

firewall

proxy

load balancer

DNS

Answer

Explanation

DNS (Domain Name System) is the technology responsible for matching a name to an IP address of an application running on a host. When a user types a domain name into a browser, DNS translates that domain name into the corresponding IP address, enabling the user's device to connect to the server hosting the application.

References:

Cisco DevNet Documentation - DNS

Cisco DevNet Associate Certification Guide

Questions # 85:

Which function does a router provide to a network?

Options:

broadcast domain segmentation

unique host on a Layer 3 network

unique hardware address for every node on a LAN

broadcast domain extension

Answer

Explanation

Routers play a crucial role in networking by providing several key functions, including:

Broadcast Domain Segmentation: Routers separate broadcast domains, preventing broadcast traffic from one network segment from spreading to another. This improves network efficiency and reduces unnecessary traffic.

Routing: Routers forward packets between different networks based on IP addresses, enabling communication between devices on different subnets or networks.

Network Address Translation (NAT): Routers can perform NAT, which allows multiple devices on a local network to share a single public IP address.

References:

Cisco DevNet Associate Certification Guide

Cisco Router Functions

Questions # 86:

What is a capability of the AXL API?

Options:

It signs a user in to a phone that is configured for extension mobility.

It pulls logs for the Cisco Tomcat service.

It authenticates users who exist in Cisco Unified Communications Manager.

It provides support for HTTP and HTTPS communications.

Answer

Explanation

The Administrative XML Layer (AXL) API in Cisco Unified Communications Manager (CUCM) allows for various administrative tasks, including the ability to authenticate users. It enables applications to interact with CUCM, retrieving user information, and authenticating users based on their credentials stored in CUCM.

[Reference: Cisco DevNet AXL API Documentation, ]

Questions # 87:

Which tool simulates a network that runs Cisco equipment?

Options:

Cisco Prime Infrastructure

VMware

Docker

CML

Answer

Explanation

Cisco Modeling Labs (CML) is a network simulation tool that allows users to create, configure, and simulate networks with Cisco devices and topologies.

Cisco Modeling Labs (CML): CML provides a virtual environment where users can simulate network topologies and devices, including routers, switches, and other network components.

Simulation and Testing: CML allows users to test configurations, troubleshoot network issues, and study network behavior in a controlled environment.

References:

Cisco Modeling Labs: Cisco Modeling Labs

Questions # 88:

What is an advantage of device-level management as compared to controller-level management to automate the configuration of network devices?

Options:

Device-level management has access to all devices from a single point on the network and controller-level management does not.

Device-level management supports all subsets of the potential device settings and controller-level management does not.

Device-level management supports REST API-enabled devices and controller-level management does not.

Device-level management requires one controller per vendor and controller-level management does not.

Answer

Explanation

Device-level management allows for more granular control over the specific settings and configurations of individual network devices. This is beneficial in scenarios where fine-tuning of device settings is required, and where certain configurations may not be exposed or supported by the overarching controller. Controller-level management, on the other hand, abstracts many device-specific settings to provide a more uniform and simplified management interface, which may not support all the detailed configurations available at the device level.

References:

Cisco DevNet: Device vs. Controller Management

Questions # 89:

Drag and drop the code from the bottom onto the box where the code is missing to construct a Python script that calls a REST API request. The Python script retrieves a list of tasks from a to-do list for effective project management purposes. Not all options are used.

Question # 89

Options:

Answer

Answer:

Questions # 90:

Drag and drop the code from the bottom onto the box where the code is missing to authenticate with the Cisco DNA Center REST API by using basic authentication. Then generate a token for later use. Not all options are used.

Question # 90