CompTIA CV0-004 Online Practice Questions and Exam Preparation

CompTIA CV0-004 Online Questions & Answers

• Question 91:

  A cloud engineer is extending on-premises services to a public cloud. The following design requirements must be considered in the overall solution:

  1. The ability to remotely connect systems from both environments

  2. No IP address conflicts or overlap

  3. Cost-effectiveness

  Which of the following cloud network concepts best meets these requirements?

  A. Dedicated connection
  B. VPN
  C. VLAN
  D. ACL
  B. VPN

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  Explanation

  A Virtual Private Network (VPN) is the most cost-effective solution for extending on-premises services to a public cloud while ensuring secure remote connectivity. VPNs can be configured to avoid IP address conflicts and overlap by using IP address translation and tunneling techniques, making them suitable for connecting disparate environments without significant changes to the existing network infrastructure.

• Question 92:

  A software engineer needs to transfer data over the internet using programmatic access while also being able to query the data.

  Which of the following will best help the engineer to complete this task?

  A. SQL
  B. Web sockets
  C. RPC
  D. GraphQL
  D. GraphQL

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  Explanation

  GraphQL is the best option for transferring data over the internet with programmatic access and querying capabilities. It is a query language for APIs and a runtime for executing those queries with existing data, providing a more efficient, powerful, and flexible alternative to the REST API.

  References:

  Data transfer and querying methods are part of the technical knowledge associated with cloud computing, as included in CompTIA Cloud+.

• Question 93:

  A DevOps engineer is integrating multiple systems. Each system has its own API that exchanges data based on different application-level transactions.

  Which of the following delivery mechanisms would best support this integration?

  A. Enterprise service bus
  B. Socket
  C. RPC
  D. Queue
  A. Enterprise service bus

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  Explanation

  An Enterprise Service Bus (ESB) is designed to facilitate application integration by providing a centralized architecture for high-level, message-based, and event-driven communication between different systems. It is particularly well-suited for integrating multiple systems with their own APIs because it can handle various data formats and protocols, enabling different applications to communicate with each other seamlessly.

  References:

  CompTIA Cloud+ Certification Study Guide (Exam CV0-004) by Scott Wilson and Eric Vanderburg

• Question 94:

  A company wants to optimize cloud resources and lower the overhead caused by managing multiple operating systems.

  Which of the following compute resources would be best to help to achieve this goal?

  A. VM
  B. Containers
  C. Remote desktops
  D. Bare-metal servers
  B. Containers

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  Explanation

  Containers are the best compute resources to optimize cloud resources and lower the overhead caused by managing multiple operating systems. Containers encapsulate applications and their dependencies into a single executable package, running on a shared OS kernel, which reduces the need for separate operating systems for each application and simplifies resource management.

  References:

  CompTIA Cloud+ materials discuss management and technical operations in cloud environments, including the use of containers to improve resource utilization and operational efficiency by minimizing the overhead associated with traditional VMs.

• Question 95:

  Which of the following is an example of refactoring?

  A. Creation of a container registry
  B. Code changes to facilitate platform hosting
  C. Operating system upgrade
  D. Document conversion to a secure file format
  B. Code changes to facilitate platform hosting

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  Explanation

  Refactoring involves modifying existing code to improve its efficiency, maintainability, or compatibility without changing its core functionality. Making code changes to facilitate platform hosting, such as adapting an application for cloud-native deployment, containerization, or microservices, is a key example of refactoring.

• Question 96:

  Which of the following is a direct effect of cloud migration on an enterprise?

  A. The enterprise must reorganize the reporting structure.
  B. Compatibility issues must be addressed on premises after migration.
  C. Cloud solutions will require less resources than on-premises installations.
  D. Utility costs will be reduced on premises.
  D. Utility costs will be reduced on premises.

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  Explanation

  Cloud migration typically results in a reduction of on-premises utility costs because the physical infrastructure requirements, such as power and cooling, are transferred to the cloud provider. This shift can lead to significant savings in utility expenses for the enterprise.

  References:

  CompTIA Cloud+ Guide to Cloud Computing (ISBN: 978-1-64274- 282-2)

• Question 97:

  A cloud service provider requires users to migrate to a new type of VM within three months.

  Which of the following is the best justification for this requirement?

  A. Security flaws need to be patched.
  B. Updates could affect the current state of the VMs.
  C. The cloud provider will be performing maintenance of the infrastructure.
  D. The equipment is reaching end of life and end of support.
  D. The equipment is reaching end of life and end of support.

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  Explanation

  The best justification for a cloud service provider requiring users to migrate to a new type of VM within a specific time frame is that the equipment is reaching end of life and end of support (EOL/EOS). This means that the older type of VM will no longer receive updates or support, which could include important security patches, so it is necessary to move to newer VM types to maintain security and performance.

  References:

  CompTIA Cloud+ Study Guide (Exam CV0-004) by Todd Montgomery and Stephen Olson

• Question 98:

  A company has its application in a Docker container running in a single node in a cloud environment. The company is growing, and multiple customers now require the addition of more containers to accommodate the increasing load. New nodes will be deployed to manage the additional containers.

  Which of the following is the best approach to manage the new environment?

  A. Create a Jenkins pipeline to execute the Docker containers in the nodes farm.
  B. Configure Terraform to start the Docker containers by using customized user data on the new worker nodes
  C. Utilize Ansible to deploy the new containers into the new worker nodes
  D. Use Kubernetes to orchestrate containers allocation throughout multiple worker nodes
  D. Use Kubernetes to orchestrate containers allocation throughout multiple worker nodes

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  Explanation

  Kubernetes is designed to orchestrate containers across multiple worker nodes. It automates container deployment, scheduling, scaling, load balancing, and failover, making it the most appropriate solution for managing a growing containerized environment distributed across multiple nodes.

• Question 99:

  A company experienced a data leak through its website. A security engineer, who is investigating the issue, runs a vulnerability scan against the website and receives the following output:

  

  Which of the following is the most likely cause of this leak?

  A. RTMP port open
  B. SQL injection
  C. Privilege escalation
  D. Insecure protocol
  D. Insecure protocol

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  Explanation

  The data leak is most likely caused by the use of an insecure protocol. The vulnerability scan output shows that port 21/tcp for FTP (File Transfer Protocol) is open. FTP is known for transmitting data unencrypted, which could allow sensitive data to be intercepted during transfer.

  References:

  The security risks associated with the use of insecure or unencrypted protocols are covered under cloud security best practices in the CompTIA Cloud+ curriculum.

• Question 100:

  A cloud engineer needs to choose a storage technology that fulfills the following requirements: 99.99% durability Resilient to instance failures Resilient to instance deletions.

  Which of the following types of storage is the best option?

  A. Ephemeral
  B. Cache
  C. Persistent
  D. Local
  C. Persistent

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  Explanation

  Persistent storage maintains data independently of instance failures or deletions and provides high durability, satisfying all stated requirements.