Practice Free CV0-004 Exam Online Questions
A cloud engineer needs to deploy a new version of a web application to 100 servers. In the past, new
version deployments have caused outages.
Which of the following deployment types should the cloud engineer implement to prevent the outages from happening this time?
- A . Rolling
- B . Blue-green
- C . Canary
- D . Round-robin
C
Explanation:
A canary deployment is a pattern that reduces the risk of introducing a new software version in production by slowly rolling out the change to a small subset of users before rolling it out to the entire infrastructure. It’s an effective strategy to prevent outages since it allows for monitoring and quick rollback if issues arise without affecting all users.
Reference: Canary releases are part of deployment strategies that can help mitigate the risk of outages during updates, a concept included in the CompTIA Cloud+ curriculum.
A cloud engineer is troubleshooting a connectivity issue. The application server with IP 192.168.1.10 in one subnet is not connecting to the MySQL database server with IP 192.168.2 20 in a different subnet. The cloud engineer reviews the following information:
Application Server Stateful Firewall
Which of the following should the cloud engineer address lo fix the communication issue?
- A . The Application Server Stateful Firewall
- B . The Application Server Subnet Routing Table
- C . The MySQL Server Stateful Firewall
- D . The MySQL Server Subnet Routing Table
C
Explanation:
The connectivity issue between the application server and the MySQL database server in different subnets is likely due to the MySQL Server Stateful Firewall’s inbound rules. The application server has an IP of 192.168.1.10, but the MySQL server’s inbound rules only permit IP 192.168.1.10/32 on port 3306. This rule allows only a single IP address (192.168.1.10) to communicate on port 3306, which is typical for MySQL. However, if the application server’s IP is not 192.168.1.10 or the application is trying to communicate on a different port, it would be blocked. To fix the communication issue, the cloud engineer should address the inbound rules on the MySQL Server Stateful Firewall to ensure that the application server’s IP address and the required port are allowed.
Reference: Based on the information provided in the question and general networking principles.
A company serves customers globally from its website hosted in North America. A cloud engineer recently deployed new instances of the website in the Europe region.
Which of the following is the most likely reason?
- A . To simplify workflow
- B . To enhance security
- C . To reduce latency
- D . To decrease cost
C
Explanation:
The most likely reason for deploying new instances of a website in the Europe region, in addition to the ones hosted in North America, is to reduce latency for users located in Europe. By having the website’s resources closer to the end-users, the data has a shorter distance to travel, resulting in faster load times and better performance.
Reference: CompTIA Cloud+ Study Guide (Exam CV0-004) by Todd Montgomery and Stephen Olson
Which of the following strategies requires the development of new code before an application can be successfully migrated to a cloud provider?
- A . Refactor
- B . Rearchitect
- C . Rehost
- D . Replatform
A
Explanation:
Refactoring requires the development of new code before an application can be successfully migrated to a cloud provider. It often involves restructuring and optimizing the existing code without changing its external behavior to fit into the new cloud environment.
Reference: Application migration strategies and the requirements for each, like refactoring, are included in cloud migration best practices covered in CompTIA Cloud+.
Which of the following best describes a program in the context of project management?
- A . It is a group of unrelated projects within an organization
- B . It is used to represent the daily activities of multiple projects
- C . It is a consolidation of related projects with a common goal
- D . It provides the definition of a project workload
C
Explanation:
A program is a group of related projects managed in a coordinated way to achieve benefits not available if managed separately. This is different from a portfolio (broader grouping, not necessarily related) or daily activities (operational work).
Reference: CompTIA Project+ PK0-005 C Program vs. Project vs. Portfolio; CompTIA Cloud+ CV0-004 Cloud Architecture & Design domain.
A cloud engineer wants to deploy a new application to the cloud and is writing the following script:
Which of the following actions will this script perform?
- A . Upload a new VM image.
- B . Create a new cloud resource.
- C . Build a local server.
- D . Import a cloud module.
B
Explanation:
The script shown is written in Terraform, which is an infrastructure as code (IaC) tool used for building, changing, and versioning infrastructure safely and efficiently. This particular Terraform script specifies a required provider and its version, the Terraform version, sets the cloud provider’s region, and then defines a resource for a server instance with a specific AMI ID and instance type. It also includes tags for the instance. The action this script will perform is to create a new cloud resource, specifically a server instance on the cloud provider’s platform.
Reference: CompTIA Cloud+ Study Guide (Exam CV0-004) by Todd Montgomery and Stephen Olson
A cloud engineer is designing a high-performance computing cluster for proprietary software. The software requires low network latency and high throughput between cluster nodes.
Which of the following would have the greatest impact on latency and throughput when designing the HPC infrastructure?
- A . Node placement
- B . Node size
- C . Node NIC
- D . Node OS
A
Explanation:
Node placement is critical in high-performance computing (HPC) clusters where low network latency and high throughput are required. Proper placement of nodes within the network infrastructure, including proximity to each other and to key network components, can significantly reduce latency and increase throughput. Ensuring that nodes are physically close and well-connected can facilitate faster data transfer rates between them.
Reference: CompTIA Cloud+ Certification Study Guide (Exam CV0-004) by Scott Wilson and Eric Vanderburg
A company wants to create a few additional VDIs so support vendors and contractors have a secure method to access the company’s cloud environment. When a cloud administrator attempts to create the additional instances in the new locations, the operation is successful in some locations but fails in others.
Which of the following is the most likely reason for this failure?
- A . Partial service outages
- B . Regional service availability
- C . Service quotas
- D . Deprecation of functionality
C
Explanation:
If a cloud administrator can create additional instances in some locations but not others, the most likely reason for this failure is service quotas. Cloud providers often have quotas on the number of resources that can be created, and these limits can vary by region.
Reference: CompTIA Cloud+ Study Guide (Exam CV0-004) – Chapter on Cloud Resource Management
Between 11:00 a.m. and 1:00 p.m. on workdays, users report that the sales database is either not accessible, sluggish, or difficult to connect to. A cloud administrator discovers that during the impacted time, all hypervisors are at capacity. However, when 70% of the users are using the same database, those issues are not reported.
Which of the following is the most likely cause?
- A . Oversubscription
- B . Resource allocation
- C . Sizing issues
- D . Service quotas
A
Explanation:
The most likely cause of accessibility and performance issues during specific times is oversubscription. This happens when more users are trying to access the database than the hypervisors can handle, due to their resources being allocated to more virtual machines or processes than they can efficiently support.
Reference: Resource management concepts such as avoiding oversubscription are covered under the Management and Technical Operations domain of the CompTIA Cloud+ exam objectives.
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 database installed on a virtual machine
- B . A managed SQL database on the cloud
- C . A database migration service
- D . A hybrid database setup
B
Explanation:
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.
Reference: The use of managed services, like managed databases, to minimize operational overhead is a strategic decision in cloud computing covered in CompTIA Cloud+.