Cisco 200-901 CCNAAUTO Exam Questions Instant Access

Question 1

A developer needs to prepare the file README.md in the working tree for the next commit operation using Git. Which command needs to be used to accomplish this?

Agit add README.md staging

Bgit -a README.md

Cgit add README.md

Dgit commit README.md

Answer : C

To prepare the file README.md in the working tree for the next commit operation in Git, the command git add README.md should be used. This command stages the file, meaning it adds the file's current content to the staging area, which is a preparatory step before committing it to the repository.

git add README.md: Adds the README.md file to the staging area.

git commit README.md: Commits all staged changes (not just README.md unless it is the only file staged).

Question 2

What is a benefit of using a code review process in application development?

Aaccelerates the deployment of new features in an existing application

Bprovides version control during code development

Cenables the quick deployment of new code

Deliminates common mistakes during development

Answer : D

A code review process involves evaluating and examining another developer's code to identify potential issues, bugs, and improvements before the code is merged into the main codebase. It helps in maintaining code quality and catching errors early in the development cycle.

Error Detection: Code reviews help detect and eliminate common mistakes and bugs that developers might overlook.

Knowledge Sharing: They promote knowledge sharing and learning among team members.

Code Quality: Ensures that the code adheres to the coding standards and best practices.

Option D is correct as the primary benefit of code reviews is to eliminate common mistakes during development.

Cisco DevNet Documentation: Best Practices for Code Reviews

Question 3

A developer pushes an application to production. The application receives a webhook over HTTPS without a secret. The webhook information contains credentials to service in cleartext. When the information is received, it is stored in the database with an SHA-256 hash. Credentials to the database are accessed at runtime through the use of a vault service. While troubleshooting, the developer sets the logging to debug to view the message from the webhook. What is the security issue in this scenario?

ADatabase credentials should be accessed by using environment variables defined at runtime.

BDuring the transport of webhook messages, the credentials could be unencrypted and leaked.

CDuring logging, debugging should be disabled for the webhook message.

DHashing the credentials in the database is not secure enough; the credentials should be encrypted.

Answer : B

The main security issue in this scenario is the transmission of credentials in cleartext over HTTPS. Even though HTTPS provides a secure transport layer, the credentials should still be protected, such as by using secrets or encryption. Additionally, setting logging to debug and potentially exposing these credentials in logs is also a security concern.

Cleartext Credentials: Sending credentials in cleartext within the webhook payload can expose them if HTTPS is not configured correctly or if intercepted by an attacker.

Debug Logging: Enabling debug logging can expose sensitive information, including credentials, in logs.

Option B highlights the risk of transmitting credentials unencrypted over HTTPS, which can lead to credential leakage.

Cisco DevNet Documentation: Secure Coding Practices

Question 4

Which two query types does a client make to a DNS server? (Choose Two)

AAAAA

BACK

CDISCOVER

DInverse

EPTR

Answer : A, E

Clients make several types of queries to DNS servers. The two relevant types here are:

AAAA: This query type requests the IPv6 address associated with a domain name.

PTR: This query type is used for reverse DNS lookups, where it maps an IP address to a domain name.

AAAA (Quad-A) records store IPv6 addresses of a domain.

PTR (Pointer) records are used in reverse DNS lookups to map IP addresses to the corresponding domain names.

Question 5

Refer to the exhibit.

An engineer wants to create a Bash script to automate a workflow that is related to a machine learning-based application. The engineer wants to use the application as a container and use an image from the open-source public repository. What is accomplished by the script?

ACreate a new software package.

BInstall and remove files.

CUpdate an existing software package.

DInstall a software package

Answer : D

The Bash script shown in the exhibit performs the following actions:

Updates the list of available packages using brew update.

Installs Docker using brew install docker.

Upgrades pip and installs tensorflow and pytorch using pip install.

Pulls the latest TensorFlow Docker image using docker pull tensorflow/tensorflow:latest.

This script is designed to install the necessary software packages (Docker, TensorFlow, PyTorch) required for a machine learning-based application. It does not create or remove any software packages but installs them.

Cisco DevNet Associate Certification Guide

Docker Documentation

Homebrew Documentation

Pip Documentation

Question 6

Which two details are captured from the subnet mask? (Choose two.)

Aportion of an IP address that refers to the subnet

Bdefault gateway of the host

Cunique number ID assigned to the host

Dpart of an IP address that refers to the host

Enetwork connection of a host or interface

Answer : A, D

The subnet mask is used to determine the network and host portions of an IP address. It helps in defining the size of the subnet and the range of IP addresses within that subnet.

Subnet Portion: The subnet mask identifies which part of the IP address refers to the network (subnet) portion.

Host Portion: The remaining part of the IP address after applying the subnet mask identifies the specific host within the subnet.

Options A and D are correct as they capture the details about the subnet and host portions of an IP address.

Cisco DevNet Documentation: Understanding Subnetting

Question 7

How does requesting a synchronous API operation differ from requesting an asynchronous API operation?

Aclients poll for the status of the execution of operations

Bclients subscribe to a webhook for operation results

Cclients can access the results immediately

Dclients receive responses with a task id for further processing

Answer : C

Synchronous API Operations:

Immediate Response: In a synchronous operation, the client sends a request to the server and waits for an immediate response. The client cannot proceed until it receives this response.

Blocking Call: The call is considered blocking, meaning the client application is blocked from performing other tasks until the response is received.

Use Case: This is useful when the result of the operation is required immediately to continue the workflow.

Asynchronous API Operations:

Delayed Response: In an asynchronous operation, the client sends a request to the server and does not wait for an immediate response. Instead, it continues its processing and can check back later for the result.

Non-blocking Call: The call is non-blocking, allowing the client to perform other tasks while waiting for the server to complete the operation.

Polling and Webhooks: Clients may poll the server for status updates or subscribe to a webhook to be notified when the operation is complete.

Task ID: The server may provide a task ID in the response that can be used to check the status of the operation later.

Cisco DevNet API Documentation: API Design Guide

Cisco Automating Networks Using Cisco Platforms 200-901 CCNAAUTO Exam Questions