- (Topic 4)
A graphic designer wants to purchase a laptop that provides the most accurate color spectrum available when viewed from as many different angles as possible. Which is the following display types would best meet the graphic designer's requirements?
Correct Answer:
C
Graphic design
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The correct answer is C. OLED.
OLED stands for Organic Light-Emitting Diode, and it is a type of display technology that uses organic compounds to create light and color. Unlike LCD (Liquid Crystal Display) or Plasma displays, OLED does not require a backlight or a filter to produce images. This means that OLED can offer higher contrast, wider color gamut, and better viewing angles than other display types.
LCD displays use liquid crystals that are sandwiched between two polarizing filters and illuminated by a backlight. The liquid crystals can change their orientation and block or allow light to pass through the filters. LCD displays can have different panel types, such as IPS (In-Plane Switching), VA (Vertical Alignment), or TN (Twisted Nematic), which affect the color accuracy, response time, and viewing angles of the display.
Plasma displays use gas-filled cells that are electrically charged to create plasma, which emits ultraviolet light. The ultraviolet light then excites phosphors that emit visible light and color. Plasma displays can produce deep blacks and high contrast, but they are also prone to image retention, screen burn-in, and high power consumption.
VGA stands for Video Graphics Array, and it is not a display type but a video interface standard that was introduced in 1987. VGA can transmit analog signals from a computer to a monitor, but it has low resolution and limited color depth compared to modern digital standards such as HDMI or DisplayPort.
Therefore, OLED is the best display type for graphic designers who want the most accurate color spectrum and the widest viewing angles. OLED displays can also be thinner and lighter than LCD or Plasma displays, which makes them ideal for laptops. However, OLED displays are also more expensive and less durable than other display types, and they may suffer from image retention or burn-in over time.
- (Topic 4)
A technician is setting up storage in a server that only has SAS connectors for storage. The technician wants the server to utilize RAID 10 for increased performance. Which of the following storage types should the technician install?
Correct Answer:
B
SAS stands for Serial Attached SCSI, which is a type of interface that connects storage devices to servers or workstations. SAS supports both mechanical hard disk drives (HDDs) and solid state drives (SSDs), but not other types of storage devices, such as NVMe M.2, mSATA, or optical drives12.
RAID stands for Redundant Array of Independent Disks, which is a method of combining multiple storage devices into a logical unit that provides improved performance, reliability, or both. RAID 10 is a combination of RAID 1 (mirroring) and RAID 0 (striping), which means that data is written across two or more striped sets of mirrored drives34. Therefore, the only type of storage device that the technician can install in a server that only has SAS connectors and wants to use RAID 10 is mechanical HDDs. Mechanical HDDs use spinning platters and moving heads to store and access data, and they are usually cheaper and have larger capacities than SSDs, but they are also slower and more prone to failure .
References:
✑ CompTIA A+ Core 1 (220-1101) Certification Study Guide, Chapter 3: Hardware, Section 3.3: Storage Devices, Page 131
✑ CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Exam Cram, Chapter 3: Storage, Section 3.2: Storage Interfaces, Page 97
✑ CompTIA A+ Core 1 (220-1101) Certification Study Guide, Chapter 3: Hardware, Section 3.4: RAID, Page 143
✑ CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Exam Cram, Chapter 3:
Storage, Section 3.4: RAID, Page 104
✑ CompTIA A+ Core 1 (220-1101) Certification Study Guide, Chapter 3: Hardware, Section 3.3: Storage Devices, Page 129
✑ CompTIA A+ Core 1 (220-1101) and Core 2 (220-1102) Exam Cram, Chapter 3: Storage, Section 3.3: Hard Disk Drives, Page 99
- (Topic 4)
Which of the following is the best way to protect the data of a virtual machine in the event of hardware failure?
Correct Answer:
C
The best way to protect the data of a virtual machine in the event of hardware failure is to use a cloud-based backup solution. A cloud-based backup solution is a service that copies and stores the data of a virtual machine to a remote server or storage device over the internet. A cloud-based backup solution can offer several benefits, such as:
✑ High availability and reliability: A cloud-based backup solution can ensure that the
data of a virtual machine is always accessible and recoverable, even if the hardware that hosts the virtual machine fails or is damaged. A cloud-based backup solution can also provide redundancy and fault tolerance, by replicating the data across multiple locations or regions.
✑ Scalability and flexibility: A cloud-based backup solution can adapt to the changing
needs and demands of the virtual machine, by allowing the user to adjust the backup frequency, retention period, and storage capacity. A cloud-based backup
solution can also support different types of backup, such as full, incremental, or differential, depending on the user’s preferences and requirements.
✑ Cost-effectiveness and simplicity: A cloud-based backup solution can reduce the
cost and complexity of maintaining a backup infrastructure, by eliminating the need to purchase, install, or manage hardware, software, or licenses. A cloud-based backup solution can also automate and streamline the backup process, by providing easy-to-use tools and interfaces, such as web portals, APIs, or scripts.
Other options, such as redundant hardware, UPS, or RAID, may improve the performance or resilience of the hardware that hosts the virtual machine, but they do not provide a complete protection for the data of the virtual machine in the event of hardware failure. Redundant hardware is a technique that uses multiple components or devices to perform the same function, so that if one fails, another can take over. UPS (uninterruptible power supply) is a device that provides backup power to a system in case of a power outage or surge. RAID (redundant array of independent disks) is a technology that combines multiple disks into a logical unit, to improve the speed, capacity, or reliability of the storage. However, these options may not prevent data loss or corruption due to other causes, such as human error, malware, or natural disasters. Therefore, a cloud-based backup solution is the best way to protect the data of a virtual machine in the event of hardware failure. References:
✑ What is Cloud Backup? | Microsoft Azure1
✑ Cloud Backup - What is it and how does it work? | Veeam2
✑ Cloud Backup vs. Local Backup: Which Option is Right for You?3
- (Topic 4)
A technician is designing a new laptop for a local construction company. Company employees will move the laptop around frequently and are likely to drop the laptop while working. Which of the following drives should the technician install to mitigate for potential damage?
Correct Answer:
D
Solid-state drives (SSDs) are the best choice for laptops that are likely to drop while working, as they have no moving parts and are more resistant to shock and vibration than hard-disk drives (HDDs). SSDs also offer faster performance, lower power consumption, and less noise and heat than HDDs. SSDs use flash memory chips to store data, unlike HDDs that use spinning platters and read/write heads. SSDs can be connected to laptops using various interfaces, such as SATA, PCIe, or NVMe.
The other options are not suitable for this scenario. S.M.A.R.T (Self-Monitoring, Analysis, and Reporting Technology) is a feature that monitors the health and performance of HDDs and SSDs, but it does not prevent damage from dropping. SCSI (Small Computer System Interface) is an interface that connects various devices, such as HDDs, SSDs, scanners, and printers, to a computer, but it is not commonly used in laptops. RAID (Redundant Array of Independent Disks) is a system that combines multiple HDDs or SSDs into a single logical unit, providing redundancy, performance, or both, but it is not feasible or practical to implement RAID in a laptop.
References:
✑ CompTIA A+ Certification Exam Core 1 Objectives1
✑ The Official CompTIA A+ Core 1 Student Guide (Exam 220-1101) eBook2
✑ The Best SSDs for Upgrading Your Laptop in 2023 | PCMag3
- (Topic 1)
A technician is monitoring all outbound traffic in a SOHO. Which of the following is the MOST cost-effective solution to monitor the traffic?
Correct Answer:
B
A network tap is used to intercept the signals passing over a cable and send them to a packet or protocol analyzer. Taps are either powered or unpowered: