220-1101 Practice Test

Explanation: DSL (Digital Subscriber Line) uses POTS (Plain Old Telephone Service) lines to provide high-speed internet access. If the POTS lines are not working, it could cause an internet outage for DSL customers. Fiber and cable internet typically use different types of infrastructure, while satellite internet is not reliant on POTS lines. References: CompTIA A+ Certification Exam: Core 1 - Page 231

Explanation: In Platform as a Service (PaaS), the cloud provider manages the hardware, operating system, and middleware, while the customer is responsible for managing data and applications.
✑ Why Not B (SaaS): In SaaS, the provider manages all layers, including applications and data, leaving no responsibility for the customer.
✑ Why Not C (IaaS): In IaaS, the customer manages the OS, data, and applications, while the provider only handles the hardware.
✑ Why Not D (CaaS): CaaS (Container as a Service) is not a primary cloud model described in the CompTIA objectives and is less commonly referenced.
CompTIA A+ Exam Reference: Core 1 (220-1101), Section 4.1, cloud computing models.

Explanation: Upon identifying a potential cause of an issue with a RAID 5 array, especially when the array is making clicking noises that suggest a failing drive, the next critical step is to perform a full data backup. This ensures that data is preserved before any further troubleshooting steps are taken, such as replacing the failing drive. RAID 5 provides fault tolerance, but ensuring data is backed up minimizes the risk of data loss during the repair process.
References: ✑ CompTIA A+ Core 1 (220-1101) Exam Objectives, especially the sections dealing with storage devices and data backup and recovery principles, which would include strategies for dealing with potential drive failures in RAID arrays.
✑ Best practices in data management and protection, emphasizing the importance of securing a backup before undertaking hardware replacements or repairs in storage arrays to prevent data loss.

Explanation: Vertical lines in different colors on a laptop screen are often indicative of an issue with the liquid crystal display (LCD) itself. This could be due to a damaged display panel or issues with the connections between the display and the rest of the system. Replacing the LCD is the most likely solution to resolve this issue, as it addresses potential faults in the display hardware that are causing the visual artifacts.