Cisco Cisco Certified DevNet Professional 300-910 Questions & Answers

• Question 81:

  What is chaos engineering?

  A. designing an application with fuzzy logic that makes it hard to predict

  B. a product engineering approach that lacks a formal methodology

  C. splitting a project between teams that do not communicate with each other

  D. introducing problems into a system to study behavior and improve reliability

  Correct Answer: D

• Question 82:

  How long analysis systems such as Elasticsearch, Logstash, and Kibana Stack handle ingesting unstructured logs from different devices in various formats?

  A. All devices that generate syslogs must use agents that process the local logs and transmit them in a specific format to the ELK Stack.

  B. All logs are stored in their unstructured text format, and the ELK Stack performs data analysis by intelligently parsing the logs using machine learning algorithms.

  C. All different message formats are parsed separately using custom filters, and the resulting structured data is stored for later analysis.

  D. A single, comprehensive log format is defined on the ELK Stack. All incoming logs, regardless of format, are transformed to match the comprehensive format, and only applicable fields are populated.

  Correct Answer: C

  The ELK Stack (Elasticsearch, Logstash, and Kibana) can handle ingesting unstructured logs from various devices in different formats by running custom filters on the logs. The filters are designed to parse the log data and extract the relevant, structured information from it, which is then stored for later analysis. This allows for faster and more accurate analysis of the data, and enables more sophisticated insights to be drawn from it.

• Question 83:

  An end user is seeing long web page load times on the internal business application that they are trying to view. The user is seeing this issue across multiple web browsers, and other users encounter the same issue. Which action should the system administrator take to start looking for the cause of this issue?

  A. Check to make sure Nginx is running.

  B. Check for response times in Nginx logs.

  C. Check to make sure the web API response is coming back in JSON.

  D. Check the size of the database that the application is using.

  Correct Answer: B

• Question 84:

  The E-commerce application is being monitored using AppDynamics. AppDynamics has noticed that the application response has degraded and has identified some thread contention that might be the cause of the delays. Where in the interface does AppDynamics bring this to your attention?

  A. Potential Issues section of an individual transaction

  B. Transaction Score graph of a business transaction

  C. Code Deadlock section of the Event List

  D. Slow Calls and Errors tab of the application

  Correct Answer: A

  https://docs.appdynamics.com/display/PRO43/Thread+Contention

• Question 85:

  AppDynamics is being used to monitor your distributed Python application. Each individual container of the application is instrumented with an AppD agent. Which two configuration variables uniquely determine the module being monitored? (Choose two.)

  A. node

  B. app

  C. agent

  D. tier

  E. event

  Correct Answer: AD

  Appdynamics Agents Install Wizard Step 2 Enter the configuration values... https://docs.appdynamics.com/appd/4.5.x/en/application-monitoring/install-app-server- agents#InstallAppServerAgents-UsetheGettingStartedWizard Tier and Node Naming Guidelines https://docs.appdynamics.com/appd/4.5.x/en/application-monitoring/install-app-server-agents#InstallAppServerAgents-tier-node-namingTierandNodeNamingGuidelines

• Question 86:

  What are two advantages of using Configuration Management Tools? (Choose two.)

  A. reduction in policy violations caused by human errors

  B. reduction in administration costs

  C. reduction in network changes already performed automatically

  D. reduction of on-premises networking equipment

  E. reduction in networking team skills

  Correct Answer: AB

  Configuration Management Tools allow for automated configuration of networking equipment, which helps to reduce human errors and the time and money needed to manage and configure the equipment. For example, Cisco Configuration Professional (CCP) is a configuration management tool that provides automated configuration, validation, and troubleshooting of network infrastructure devices. CCP enables administrators to configure and deploy network changes quickly and efficiently, while also reducing the costs associated with manual configuration and troubleshooting.

• Question 87:

  Which step must be taken to enable centralized logging in a Kubernetes environment?

  A. No steps need to be taken. The master node automatically aggregates logs from all worker nodes and stores them on the specified persistent volume.

  B. Create a CustomResourceDefinition in each deployment that specifies the IP or names the log collector.

  C. Deploy a sidecar node that aggregates logs from the entire cluster.

  D. Create a DaemonSet that deploys a container with a logging agent on every node in the cluster.

  Correct Answer: D

  To enable centralized logging in a Kubernetes environment, you must create a DaemonSet that deploys a container with a logging agent on every node in the cluster. This allows all of the logs from each node to be collected in one place, allowing for easier analysis and management. Reference: Kubernetes Documentation, Logging Architecture.

• Question 88:

  To make logging searches more efficient and useful in Kibana, an Administrator wants to implement index patterns around the hostname of some software systems. Where should this be configured?

  A. Configure a new JSON object in Kibana.

  B. Create a search index in Logstash.

  C. Create an index pattern in Kibana.

  D. Create a time filter on Kibana to look at time only.

  Correct Answer: C

• Question 89:

  Which interface is most commonly used to integrate logging, monitoring, and alerting applications into your CI/CD pipeline?

  A. AMQP

  B. SNMP

  C. SSH

  D. REST

  Correct Answer: D

  The most commonly used interface to integrate logging, monitoring, and alerting applications into your CI/CD pipeline is REST. Representational State Transfer (REST) is an architectural style that defines a set of constraints and properties based on HTTP. It enables developers to create APIs that are easy to use and access, and is well- suited for integrating logging, monitoring, and alerting applications into your CI/CD pipeline.

• Question 90:

  A developer has created a deployment that should launch a pod to run their database service. The pod should launch with a metadata name of "Cisco-DB," and the developer has added it to the "Cisco" namespace in their deployment.

  Which Kubernetes command confirms that the service is running and usable?

  A. kubectl -n Cisco get services | grep "Cisco-DB"

  B. kubectl -n Cisco get pods | grep "Cisco-DB"

  C. kubectl get pods | grep "Cisco-DB"

  D. kubectl -n Cisco get service | grep "Cisco-DB"

  Correct Answer: B

  The correct answer is B. kubectl -n Cisco get pods | grep "Cisco-DB". This command allows you to view the pods in the Cisco namespace and filter the list for the pod named "Cisco-DB". This will confirm that the pod is running and usable. References: Cisco Implementing DevOps Solutions and Practices using Cisco Platforms (DEVOPS) Study Manual, Chapter 6, Section 6.3: Kubernetes Commands, Page 113.