[2023年04月11日] 有効な300-910テスト解答300-910試験PDF問題を試そう
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質問 # 14
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
正解：A
解説：
Explanation
https://docs.appdynamics.com/display/PRO43/Thread+Contention
質問 # 15
A developer wants to deploy a highly available web server cluster and decides to put a load balancer in front of multiple clustered nodes that run the same web service. The goal is for the load balancer to take in users and distribute the load across the whole cluster.
What kind of high-availability configuration is the developer running?
- A. active
- B. active-passive
- C. active-active
- D. passive
正解：C
解説：
Explanation
An active-active high-availability configuration is when the load balancer is used to distribute the load across the whole cluster of nodes that are running the same web service. In this configuration, all of the nodes are active and available to serve requests at any given time. This is in contrast to an active-passive configuration, where only one node is active and the other nodes are passive and serve as backups in case of a failure.
質問 # 16 
Drag and drop the scenarios from the left onto the cloud strategy categories on the right.
正解：
解説：
質問 # 17
What are two advantages of using Configuration Management Tools? (Choose two.)
- A. reduction in network changes already performed automatically
- B. reduction in policy violations caused by human errors
- C. reduction in administration costs
- D. reduction of on-premises networking equipment
- E. reduction in networking team skills
正解：A、C
質問 # 18
Refer to the exhibit.
Which CI solution uses this file?
- A. GitLab CI
- B. Drone
- C. Travis CI
- D. Jenkins
正解：B
解説：
Explanation
syntax for GitLab CI, Travis CI & Jenkins are "stage...", while Drone use "steps..." Here are the configuration files I referred https://docs.drone.io/pipeline/environment/syntax/
https://docs.gitlab.com/ee/ci/yaml/includes.html
https://blog.travis-ci.com/2019-05-30-setting-up-a-ci-cd-process-on-github
https://www.jenkins.io/doc/pipeline/examples/
質問 # 19
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
正解：D
質問 # 20
DRAG DROP
An application is being built to collect and display telemetry streaming data. Drag and drop the elements of this stack from the left onto the correct functions on the right.
Select and Place:
正解：
解説：
Section: Logging, Monitoring, and Metrics
質問 # 21
A developer wants to deploy a highly available web server cluster and decides to put a load balancer in front of multiple clustered nodes that run the same web service. The goal is for the load balancer to take in users and distribute the load across the whole cluster.
What kind of high-availability configuration is the developer running?
- A. active
- B. active-active
- C. active-passive
- D. passive
正解：C
解説：
Section: Cloud and Multicloud
質問 # 22
A developer is creating an application based on microservices. The application will be used as a central repository for all company's documents. One of the microservices in the application will perform image processing. This microservice must autoscale to meet the current load and avoid down time.
Which metric must be used to trigger autoscaling events?
- A. memory
- B. disk I/O
- C. network
- D. CPU/GPU
正解：D
質問 # 23
How does eliminating hardcoded or default passwords help to secure an environment?
- A. helps penetration testing team to focus on other issues more efficiently
- B. helps by enforcing your password in a repository and storing it in a secure vault
- C. helps by removing back doors in your environments
- D. helps to manage passwords centrally
正解：B
解説：
Section: Security
質問 # 24
When DevOps practices are integrated into an existing organization, which two characteristics are positive indicators of DevOps maturity? (Choose two.)
- A. cone testing
- B. change lead time
- C. mean time to recover
- D. mean time between success
- E. age of codebase
正解：B、C
質問 # 25
Which method is a safe way to provide a username/password combination to an application running as a service in a Docker container?
- A. as an environment variable in the Dockerfile
- B. Docker environment variable
- C. Docker secrets
- D. encode the value with base64 in a secure DNS CTEXT entry
正解：C
解説：
Explanation
a docker secret is a blob of data, such as a password, SSH private key, SSL certificate, or another piece of data that should not be transmitted over a network or stored unencrypted in a Dockerfile or in your application's source code
質問 # 26 
Drag and drop the steps in Gartner's public cloud cost management framework from the left into the order on the right.
正解：
解説：
質問 # 27
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
正解：A
解説：
Section: Logging, Monitoring, and Metrics
質問 # 28
An application is being built to collect and display telemetry streaming dat a. Drag and drop the elements of this stack from the left onto the correct functions on the right.
正解：
解説：
質問 # 29
What is the impact of using the Drone.io CI/CD tool on the local installation step?
- A. delays the deployment of components
- B. complicates the application process
- C. speeds up the procedure
- D. slows down the development
正解：C
質問 # 30
A developer wants to deploy a highly available web server cluster and decides to put a load balancer in front of multiple clustered nodes that run the same web service. The goal is for the load balancer to take in users and distribute the load across the whole cluster.
What kind of high-availability configuration is the developer running?
- A. active
- B. active-active
- C. active-passive
- D. passive
正解：C
質問 # 31
Which interface is most commonly used to integrate logging, monitoring, and alerting applications into your CI/ CD pipeline?
- A. SNMP
- B. REST
- C. AMQP
- D. SSH
正解：D
解説：
Section: Logging, Monitoring, and Metrics
Explanation/Reference:
質問 # 32
When DevOps practices are integrated into an existing organization, which two characteristics are positive indicators of DevOps maturity? (Choose two.)
- A. cone testing
- B. change lead time
- C. mean time to recover
- D. mean time between success
- E. age of codebase
正解：B、C
解説：
Explanation
Change lead time is the amount of time it takes for a proposed change to go from the idea phase to being fully deployed in production. This metric can be used to measure the speed and efficiency with which changes are implemented, which is often indicative of an organization's DevOps maturity. Mean time to recover (MTTR) is the average amount of time it takes to restore a service or application to its working state when an issue arises. MTTR is an important metric for measuring the resilience of an organization's infrastructure, and is another indicator of DevOps maturity. (Source: Cisco Implementing DevOps Solutions and Practices using Cisco Platforms (DEVOPS) Study Manual Chapter 1, Understanding DevOps)
質問 # 33
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