CV0-003 Online Practice Questions and Answers

Correct Answer: B

Federation is a type of authentication mechanism that allows users to access multiple systems or applications across different domains or organizations with a single login credential. Federation can help configure SSO authentication in a hybrid cloud environment, as it can enable seamless and secure access to cloud-based and on- premises resources using the same identity provider and authentication method. Federation can also improve user convenience, productivity, and security, as it can simplify the login process, reduce login errors, and enhance password management. References: CompTIA Cloud+ Certification Exam Objectives, page 14, section 2.7

Correct Answer: A

The driver is the most likely cause of the drop in network performance after a hardware upgrade on a private cloud system. A driver is a software component that enables communication and interaction between hardware devices and operating systems or applications. A driver may need to be updated or reinstalled after a hardware upgrade to ensure compatibility and functionality. If the driver is outdated, missing, or corrupted, it may affect the network performance of the system.

Correct Answer: D

Network flows are records of network traffic that capture information such as source and destination IP addresses, ports, protocols, timestamps, and byte and packet counts. Network flows can provide near-real-time information on the volume of data being exchanged between a system and its clients on the Internet, as they can measure and monitor the amount and rate of network traffic for each connection or session. Network flows can also help analyze network performance, troubleshoot network issues, and detect network anomalies or security incidents. A systems administrator should implement network flows to achieve the objective of having near-real-time information on the volume of data being exchanged between an application server and its clients on the Internet. References: CompTIA Cloud+ Certification Exam Objectives, page 16, section 3.2

Correct Answer: A

Creating a VPC (Virtual Private Cloud) and peering the networks is the best option to accommodate additional servers in a public cloud environment that has run out of IP addresses. A VPC is a logically isolated section of a cloud provider's network that allows customers to launch and configure their own virtual network resources. Peering is a process of connecting two VPCs together so that they can communicate with each other as if they were in the same network.

Correct Answer: C

A service account is a type of user account that is created for a specific service or application to run on a server or system. Creating a service account on the server is the best authentication technique to use within the playbook to run tasks against the server on a set schedule, as it can provide secure and consistent access to the server without exposing or hard-coding any sensitive credentials within the playbook. Creating a service account can also help manage and monitor the tasks and activities performed by the service or application on the server. References: CompTIA Cloud+ Certification Exam Objectives, page 14, section 2.7

Correct Answer: C

Implementing an application whitelisting policy is the best way to prevent users from running malware on several IaaS compute instances. Application whitelisting is a security technique that allows only authorized or trusted applications to run on a system or device, and blocks or restricts all other applications. Application whitelisting can prevent users from running malware or unwanted software on their cloud instances, as well as reduce the attack surface and vulnerabilities of the system.

Correct Answer: A

Correct Answer: B

Vendor lock-in is a barrier to switching providers for a hosted mail solution that has increased its monthly subscription rate every year. Vendor lock-in is a situation where a customer becomes dependent on a vendor or provider for a product or service and faces difficulties or costs in switching to another vendor or provider. Vendor lock-in can occur due to various factors, such as proprietary technology, contractual obligations, data migration challenges, compatibility issues, etc. In this case, the customer may face vendor lock-in due to the large amount of data being hosted by the mail provider and the potential challenges or costs of transferring or migrating the data to another provider.

Correct Answer: B

Configuring a firewall rule to block the traffic on the affected instance is what the administrator should perform during the containment phase of a security incident in the cloud. A security incident is an event or situation that affects or may affect the confidentiality, integrity, or availability of cloud resources or data. A security incident response is a process of managing and resolving a security incident using various phases, such as identification, containment, eradication, recovery, etc. The containment phase is where the administrator tries to isolate and prevent the spread or escalation of the security incident. Configuring a firewall rule to block the traffic on the affected instance can help to contain a security incident by cutting off any communication or interaction between the instance and other systems or networks, which may stop any malicious or unauthorized activity or access.

Correct Answer: A

If a systems administrator gets an error while executing a vertical-scaling test of the vCPU on VMs in a virtualized environment, the issue is MOST likely related to "Compute" (A).

In a virtualized environment, the "Compute" refers to the processing power (CPU and RAM) of the physical host machine that runs multiple virtual machines. Vertical scaling is the process of adding more resources to a virtual machine to increase its processing power. If the administrator is encountering an error while executing a vertical-scaling test of the vCPU on VMs, it indicates that there may be an issue with the compute resources available to the VMs, such as insufficient processing power or limited capacity on the physical host.

Correct Answer: C

(A)

99.00% uptime annually = 3d, 14h, 56m allowed downtime

(B)

99.90% uptime annually = 8h, 41m allowed downtime

(C)

99.95% uptime annually = 4h, 20m allowed downtime

(D)

99.99% uptime annually = 52m allowed downtime

Correct Answer: D

This is the best definition of serverless computing that explains how it is different from using VMs (Virtual Machines). Serverless computing is a cloud service model that provides customers with a platform to run applications or functions

without having to manage or provision any underlying infrastructure or resources, such as servers, storage, network, OS, etc. Serverless computing is different from using VMs in the following ways:

Serverless computing allows developers to focus on writing code and organizations to focus on business, rather than spending time and effort on managing or scaling VMs or other infrastructure components. Serverless computing is event-

driven and pay-per-use, which means that applications or functions are executed only when triggered by a specific event or request, and customers are charged only for the resources consumed during the execution time.

Serverless computing is more scalable and flexible than using VMs, as it can automatically adjust the capacity and performance of applications or functions according to demand or workload, without requiring any manual intervention or

configuration.

Correct Answer: D

Correct Answer: C

Explanation: The upgrade method that is being implemented by the systems administrator is rolling. A rolling upgrade is a type of upgrade that applies the new version of a software or service to a subset of nodes or instances at a time, while the rest of the nodes or instances continue to run the old version. This way, the upgrade can be performed gradually and incrementally, without causing downtime or disruption to the entire system. A rolling upgrade can also help to monitor and test the new version for any issues or errors, and roll back to the old version if needed12. A canary upgrade is a type of upgrade that applies the new version of a software or service to a small and selected group of users or customers, before rolling it out to the rest of the population. This way, the upgrade can be evaluated for its performance, functionality, and feedback, and any problems or bugs can be fixed before affecting the majority of users or customers34. A blue-green upgrade is a type of upgrade that involves having two identical environments, one running the old version (blue) and one running the new version (green) of a software or service. The traffic is switched from the blue environment to the green environment once the new version is ready and tested. This way, the upgrade can be performed quickly and seamlessly, without any downtime or risk of failure. The blue environment can also serve as a backup in case of any issues with the green environment5 . A staging upgrade is a type of upgrade that involves having a separate environment that mimics the production environment, where the new version of a software or service is deployed and tested before moving it to the production environment. This way, the upgrade can be verified and validated for its compatibility, security, and quality, and any defects or errors can be resolved before affecting the live system .

Correct Answer: A

Explanation: A disaster recovery (DR) solution is a set of policies, procedures, and tools that enable an organization to restore or continue its critical functions in the event of a natural or human-induced disaster. A DR solution for the application between different data centers means that the application is replicated or backed up to another location that is geographically separated from the primary data center. This way, if the primary data center becomes unavailable due to a power outage, fire, flood, cyberattack, or any other cause, the application can be switched over to the secondary data center and resume its operations with minimal downtime and data loss. This solution ensures business continuity and high availability for the application and its users. References: CompTIA Cloud+ CV0- 003 Study Guide, Chapter 5: Maintaining a Cloud Environment, page 221-222; Disaster recovery planning guide.