CV0-004のPDF試験材料2025年最新の実際に出るCV0-004問題集
更新されたのはCompTIA CV0-004問題集PDFオンラインエンジン
質問 # 25
An administrator used a script that worked in the past to create and tag five virtual machines. All of the virtual machines have been created: however, the administrator sees the following results:
{ tags: [ ] }
Which of the following is the most likely reason for this result?
- A. Command deprecation
- B. Compatibility issues
- C. Service quotas
- D. API throttling
正解：A
解説：
The most likely reason for the script creating virtual machines without tags, despite working in the past, is command deprecation. Cloud service providers update their APIs and CLI commands over time, and a previously used command to tag resources might no longer be valid.
Reference: Understanding cloud service APIs and the importance of keeping up with updates is part of cloud technical operations covered in CompTIA Cloud+.
質問 # 26
A cloud administrator recently created three servers in the cloud. The goal was to create ACLs so the servers could not communicate with each other. The servers were configured with the following IP addresses:
After implementing the ACLs, the administrator confirmed that some servers are still able to reach the other servers. Which of the following should the administrator change to prevent the servers from being on the same network?
- A. The IP address of Server 2 to 172.16.12.18
- B. The IP address of Server 1 to 172.16.12.36
- C. The IP address of Server 1 to 172.16.12.2
- D. The IP address of Server 2 to 172.16.14.14
正解：C
解説：
To prevent the servers from being on the same network and communicating with each other, the administrator should change the IP address of Server 1 to 172.16.12.2. This IP address is outside the subnet defined by the subnet mask 255.255.255.240, which would place Server 1 on a different subnet, preventing direct communication without routing. Reference: CompTIA Cloud+ Study Guide (Exam CV0-004) by Todd Montgomery and Stephen Olson
質問 # 27
A cloud engineer is receiving multiple alerts from the infrastructure monitoring agent. The alerts state that all the VMs in the public subnet are at 100% CPU utilization. However, when the engineer checks the network utilization of the VMs, the network throughput is at normal levels. Which of the following is the most likely cause of this issue?
- A. Cryptojacking
- B. Ransomware
- C. DDoS
- D. Zombie instances
正解：A
解説：
A . Ransomware: Encrypts data to demand payment but doesn't typically result in sustained high CPU utilization.
B . Cryptojacking: Involves unauthorized use of VMs to mine cryptocurrency, leading to 100% CPU usage without high network activity.
C . DDoS: Causes high network throughput and latency, which are not present in this scenario.
D . Zombie instances: Refers to unused VMs consuming resources unnecessarily but doesn't explain high CPU utilization.
Reference:
CompTIA Cloud+ CV0-004 Study Guide, Objective 4.5: Identify and mitigate security incidents in cloud environments.
質問 # 28
An organization is hosting a seminar with eight individuals who need to connect to their own dedicated VM. The technician used the following VM configurations:
IP address: DHCP
NIC: 1Gbps
Network: 10.1.10.0/29
Several users are unable to access their VMs. Which of the following best describes the reason?
- A. Too much traffic is on the network.
- B. DHCP is not working correctly on the VM.
- C. Not enough addresses are available.
- D. The routes are misconfigured.
正解：C
解説：
The network is configured with a subnet of /29, which provides only 6 usable IP addresses after accounting for the network and broadcast addresses. With eight individuals needing to connect to their own dedicated VMs, there are not enough IP addresses available to assign to each VM, leading to several users being unable to access their VMs. This issue is not related to misconfigured routes, network traffic, or DHCP functionality, but rather the limited number of IP addresses available in the given subnet.
質問 # 29
A cloud administrator deploys new VMs in a cluster and discovers they are getting IP addresses in the range of 169.254.0.0/16. Which of the following is the most likely cause?
- A. The network is overlapping.
- B. The scope has been exhausted.
- C. The VLAN is missing.
- D. The NAT is Improperly configured.
正解：B
解説：
IP addresses in the range of 169.254.0.0/16 are Automatic Private IP Addressing (APIPA) addresses, which devices assign themselves when they are configured to obtain an IP automatically but are unable to reach a DHCP server to get one. The most likely cause for VMs in a cluster to receive APIPA addresses is the exhaustion of the DHCP scope, meaning there are no more available IP addresses in the DHCP range to be assigned.
質問 # 30
A company's man web application is no longer accessible via the internet. The cloud administrator investigates and discovers the application is accessible locally and only via an IP access. Which of the following was misconfigured?
- A. DNS
- B. NAT
- C. IP
- D. DHCP
正解：A
解説：
When a web application is accessible locally via an IP address but not via the internet, the issue likely lies with the Domain Name System (DNS). DNS is responsible for translating domain names into IP addresses. A misconfiguration in DNS records or failure in DNS resolution can prevent users from accessing the application through its domain name, even though the application itself is running and accessible via its direct IP address.
Reference: In the CompTIA Cloud+ curriculum, understanding cloud concepts and networking fundamentals, including DNS, is crucial for troubleshooting and ensuring applications are accessible and perform optimally in cloud environments.
質問 # 31
A developer is sending requests to a SaaS application. The developer becomes unable to send more requests after sending a number of them, but other developers can still send requests. Which of the following is most likely causing the issue?
- A. Service quota
- B. Rate limiting
- C. Partial outage
- D. API throttling
正解：B
解説：
A . Partial outage: Would affect multiple developers, not just one.
B . API throttling: Temporarily limits requests but doesn't block them entirely.
C . Rate limiting: Prevents excessive requests from a single user or system, explaining why the developer was blocked after reaching a certain threshold.
D . Service quota: Typically applies to overall service usage rather than individual user requests.
Reference:
CompTIA Cloud+ CV0-004 Study Guide, Objective 2.6: Optimize resource usage and application access controls.
質問 # 32
Which of the following describes what CRUD is typically used for?
- A. Relational databases
- B. NoSQL databases
- C. Time series databases
- D. Graph databases
正解：A
解説：
CRUD stands for Create, Read, Update, Delete, and it is most commonly used for interacting with relational databases. These operations form the basis of persistent storage manipulation in most applications that use a database to store data.
質問 # 33
Which of the following application migration strategies will best suit a customer who wants to move a simple web application from an on-premises server to the cloud?
- A. Refactor
- B. Rehost
- C. Retain
- D. Rearchitect
正解：B
解説：
Rehosting, often referred to as a "lift and shift" strategy, is the best suit for a customer who wants to move a simple web application from an on-premises server to the cloud. It involves moving the application to the cloud without making significant changes, which can be a quick and cost-effective migration approach for straightforward applications.
Reference: The various cloud migration strategies, including rehosting, are part of the knowledge base for cloud migration in the CompTIA Cloud+ certification.
質問 # 34
A company is developing a new web application that requires a relational database management system with minimal operational overhead. Which of the following should the company choose?
- A. A hybrid database setup
- B. A managed SQL database on the cloud
- C. A database migration service
- D. A database installed on a virtual machine
正解：B
解説：
For a new web application that requires a relational database management system with minimal operational overhead, the company should choose a managed SQL database on the cloud. Managed databases provide automated backups, patching, and other management tasks, reducing the administrative burden.References:
The use of managed services, like managed databases, to minimize operational overhead is a strategic decision in cloud computing covered in CompTIA Cloud+.
質問 # 35
Which of the following is the most cost-effective way to store data that is infrequently accessed?
- A. Hot site
- B. Cold site
- C. Off-site
- D. Warm site
正解：C
解説：
The most cost-effective way to store data that is infrequently accessed is typically an off-site storage service, often referred to as cold or archival storage. This type of storage is designed for data that is rarely accessed, providing lower storage costs.References: Data storage solutions and their cost implications, including off-site (cold or archival) storage for infrequently accessed data, are part of the cloud storage options discussed in CompTIA Cloud+.
質問 # 36
A developer is testing code that will be used to deploy a web farm in a public cloud. The main code block is a function to create a load balancer and a loop to create 1.000 web servers, as shown below:
The developer runs the code against the company's cloud account and observes that the load balancer is successfully created, but only 100 web servers have been created. Which of the following should the developer do to fix this issue?
- A. Run the code multiple times until all servers are created.
- B. Place the my_load_balancer () function after the loop.
- C. Request an increase of Instance quota.
- D. Check the my_web_server () function to ensure it is using the right credentials.
正解：C
解説：
The developer should request an increase of the instance quota from the cloud provider. Cloud services often have a limit on the number of instances that can be created, which is known as an instance quota. If the load balancer is successfully created but the number of web servers is limited to 100, it suggests that the quota has been reached. Increasing the quota will allow the creation of additional web server instances up to the desired number.
質問 # 37
A newly configured VM fails to run application updates despite having internet access. The updates download automatically from a third-party network. Given the following output:
Which of the following troubleshooting steps would be best to take?
- A. Reconfiguring routing protocols
- B. Testing the IP address configuration
- C. Checking DNS configurations
- D. Running a trace to the router
正解：C
解説：
The best troubleshooting step to take given the output is to check DNS configurations. The failure to resolve the "na.updateserver.net" domain suggests a DNS resolution issue, which could be due to incorrect DNS settings, a failure in the DNS service, or an issue with the DNS server itself.
Reference: Troubleshooting DNS issues is a crucial skill in cloud management, as DNS plays a fundamental role in network connectivity and access to resources. It is covered under Cloud Concepts in the CompTIA Cloud+ curriculum.
質問 # 38
A cloud administrator needs to collect process-level, memory-usage tracking for the virtual machines that are part of an autoscaling group. Which of the following is the best way to accomplish the goal by using cloud-native monitoring services?
- A. Configuring page file/swap metrics
- B. Deploying the cloud-monitoring agent software
- C. Enabling memory monitoring in the VM configuration
- D. Scheduling a script to collect the data
正解：B
解説：
To collect process-level, memory-usage tracking for virtual machines, deploying cloud-monitoring agent software is the best approach. The agent can gather detailed system metrics and send them to the cloud-native monitoring services for analysis and visualization. Reference: CompTIA Cloud+ Study Guide (Exam CV0-004) - Chapter on Cloud Monitoring
質問 # 39
Which of the following integration systems would best reduce unnecessary network traffic by allowing data to travel bidirectionally and facilitating real-time results for developers who need to display critical information within applications?
- A. Web sockets
- B. GraphQL
- C. REST API
- D. RPC
正解：A
解説：
Web sockets provide a full-duplex communication channel over a single, long-lived connection, allowing data to flow bidirectionally between a client and a server. This is ideal for real-time applications where developers need to display critical information without unnecessary network overhead, as it reduces the need for repetitive HTTP requests and allows for more efficient, instantaneous data updates and interactions.
質問 # 40
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