A+ 1101 PM Review Day 2

In a classroom, Paul and Luis are discussing the components of a Power Supply Unit (PSU). Paul asks, "Which component in a PSU converts AC power to DC power?"

• Transformer

• Rectifier

• Regulator

• Fan

Answer explanation

The rectifier converts alternating current (AC) to direct current (DC).

Koffi is building a new gaming PC and is considering different power supply units (PSUs). What is an advantage of a modular PSU over a non-modular PSU?

• Higher power output.

• Improved compatibility with older motherboards.

• Detachable cables reduce clutter and improve airflow.

• Redundant failover support.

Answer explanation

Modular PSUs allow unused cables to be removed, improving cooling and reducing clutter.

How does dust buildup impact the cooling system in Kelina's computer?

• Increases airflow.

• Reduces cooling efficiency.

• Improves fan performance.

• Prevents air gaps in thermal paste.

Answer explanation

Dust restricts airflow and reduces the effectiveness of fans and heat sinks.

What precaution should Koffi take before moving a PC with an open-loop liquid cooling system?

• Clean the water blocks.

• Drain the coolant.

• Remove the pump.

• Disconnect the radiator fans.

Answer explanation

Open-loop systems must be drained before moving to avoid leaks and damage.

Kelina is trying to connect her external hard drive to her laptop for extra storage. Which connection type is most commonly used to connect external storage devices?

• HDMI

• USB

• eSATA

• PCIe

Answer explanation

USB ports are standard for connecting external storage devices like hard drives or flash drives.

Luis and Maura are discussing the technology behind SSDs. Luis mentions that wear leveling is an important feature in these devices. Maura asks, 'Why is wear leveling used in SSDs?'

• To reduce energy consumption.

• To optimize read performance.

• To evenly distribute write operations.

• To improve cooling efficiency.

Answer explanation

Wear leveling increases SSD lifespan by ensuring all blocks are written to evenly.

During a science project, Robbie and Xavier were discussing how the speed of a hard disk drive (HDD) affects its performance. Robbie mentioned that one specific feature determines the speed at which the platters spin. What is that feature?

• Internal transfer rate

• Rotational latency

• Revolutions per minute (RPM)

• Access time

Answer explanation

RPM defines the platter spin speed, impacting overall performance.

During a group project, Kelina and Oscar are discussing how to ensure their data is safe and accessible. They consider different storage solutions and realize that implementing RAID could be beneficial. What is the primary purpose of implementing RAID?

• To improve CPU performance.

• To provide fault tolerance and redundancy.

• To replace SSDs with HDDs.

• To reduce power consumption.

Answer explanation

RAID ensures data protection and redundancy in case of drive failure.

Emma and Tornita are working on a project that uses a RAID 0 configuration to store their data across multiple disks. One day, one of the disks fails. What happens to their data?

• The data on the other disks remains intact.

• The RAID volume fails completely.

• The system uses parity to rebuild the lost data.

• The other disk takes over seamlessly.

Answer explanation

RAID 0 has no redundancy, so a single disk failure causes total data loss.

Koffi and Brad are setting up a new server for their project and want to ensure data redundancy. They decide to configure RAID 10 for better performance and fault tolerance. How many disks are required at minimum to configure RAID 10?

• 2

• 3

• 4

• 6

Answer explanation

RAID 10 combines striping and mirroring, requiring at least 4 disks with an even count.