CompTIA Practice Test Hardware #2 — Questions and Answers

Question 1: Which cooling mechanism keeps internal PC components at the lowest temperatures possible?

Fans
Liquid Cooling (Correct answer)
Heat Sinks
Thermal Paste

Correct answer: Liquid Cooling

Liquid cooling systems are generally the most effective cooling mechanism for keeping internal PC components at the lowest possible temperatures. Unlike air cooling, which relies on fans and heatsinks to dissipate heat into the surrounding air, liquid cooling uses a coolant that absorbs heat more efficiently and transfers it away from critical components like the CPU and GPU.

Question 2: A power supply unit's fan is not operating. What do you think you should do?

Attempt to fix the Fan
Change the power supply unit (Correct answer)
Change the heat sink
Change the Fan

Correct answer: Change the power supply unit

If a power supply unit's (PSU) fan is not operating, the PSU will quickly overheat, leading to potential failure and damage to other computer components. Attempting to fix or replace the fan within a PSU is dangerous due to residual electrical charge and often impractical. The safest and most recommended course of action is to replace the entire power supply unit.

Question 3: In a daisy chain, how many devices may be linked to a single USB port?

Up to 127 (Correct answer)
Up to 7
172
Unlimited

Correct answer: Up to 127

The Universal Serial Bus (USB) standard allows for a significant number of devices to be connected in a daisy chain configuration. Specifically, a single USB host controller can support up to 127 devices, including any USB hubs used in the chain. This high capacity enables extensive peripheral connectivity from a single port.

Question 4: How many pins are there on the standard Parallel printer cable connecting end?

15
8
35
25 (Correct answer)

Correct answer: 25

The standard Parallel printer cable, commonly used for older printers, utilizes a DB-25 connector on the computer end. This connector is characterized by having 25 pins arranged in two rows. This design facilitated the parallel transmission of data, sending multiple bits simultaneously.

Question 5: Which of the following is utilized as a place holder in a RIMM-based system?

C-RIMM (Correct answer)
RIMME
DDR SDRAMM
None of the above

Correct answer: C-RIMM

In RIMM (Rambus In-line Memory Module) based systems, all memory slots must be populated for the system to function correctly and maintain signal integrity. A C-RIMM (Continuity RIMM) is a special module that does not contain actual memory chips but acts as a placeholder. It completes the electrical circuit in any unused RIMM slots, ensuring proper system operation.

Question 6: Which of the following electronic devices may act as a gate for an electrical signal and enhance the flow of electricity?

Capacitor
Transistor (Correct answer)
Fuse
Resistor

Correct answer: Transistor

A transistor is a semiconductor device that serves as a fundamental building block in modern electronics. It can act as an electronic switch, controlling the flow of electrical current, effectively 'gating' signals on or off. Additionally, transistors can amplify weak electrical signals, enhancing their strength within a circuit.

Question 7: What is the most number of priorities that may be specified on a SCSI device whose ID is set by three jumpers?

7 (Correct answer)
5
18
0

Correct answer: 7

SCSI (Small Computer System Interface) devices are assigned a unique ID for identification and priority on the bus. When an ID is set by three jumpers, each jumper represents a binary bit. Three bits allow for 2^3 = 8 possible combinations (0-7). However, SCSI ID 7 is typically reserved for the host adapter, leaving IDs 0 through 6 available for other devices, which totals 7 distinct priorities.

Question 8: Which of the following uses parallel communications?

External Storage Device (Correct answer)
Keyboard
USB printer
Mouse

Correct answer: External Storage Device

Parallel communication involves transmitting multiple bits of data simultaneously over several wires. Historically, many external storage devices, such as those using SCSI or older PATA (Parallel ATA) interfaces, relied on parallel communication for data transfer. While modern external storage predominantly uses serial interfaces, this category has a history of utilizing parallel communication.

Question 9: What is the example of a teletypewriter terminal?

Storage devices
Input devices
Output devices
Input/output devices (Correct answer)

Correct answer: Input/output devices

A teletypewriter terminal, often abbreviated as TTY, is a device equipped with a keyboard for entering text and a printer or screen for displaying output. This dual functionality means it can both receive input from a user and provide output back to the user. Therefore, it is classified as an input/output (I/O) device.

Question 10: Gmail is a web-based email service that is supplied by:

Microsoft
Google (Correct answer)
Apple
Facebook

Correct answer: Google

Gmail is a widely used free web-based email service that was launched by Google in 2004. It is known for its large storage capacity, powerful search capabilities, and integration with other Google services. Google continues to be the provider and developer of Gmail.

Question 11: Which of the following describes a cloud computing delivery model in which clients rent computer resources from vendors that own and maintain all essential equipment and software rather than purchasing hardware and software?

IaaS (Correct answer)
SaaS
NaaS
PaaS

Correct answer: IaaS

Infrastructure as a Service (IaaS) is a cloud computing model where a vendor provides virtualized computing resources over the internet. Clients rent fundamental IT infrastructure like virtual machines, storage, and networks, rather than purchasing and maintaining their own hardware. This allows clients to manage their own operating systems and applications while the vendor handles the underlying physical infrastructure.

Question 12: What is the name of Apple's cloud-based email service?

iCloud Mail (Correct answer)
Yahoo! Mail
Exchange Online
Gmail

Correct answer: iCloud Mail

iCloud Mail is Apple's proprietary cloud-based email service, seamlessly integrated into its iCloud ecosystem. It provides users with an email address (e.g., @icloud.com) and enables them to send, receive, and manage emails across all their Apple devices and through a web browser. It is a core component of Apple's suite of online services.

Question 13: A cloud computing service model that provides remote access to programs in exchange for a monthly or annual membership fee is known as:Correct answer: SaaS

DaaS
PaaS
SaaS (Correct answer)
IaaS

Correct answer: SaaS

Software as a Service (SaaS) is a cloud computing model where applications are hosted by a vendor and made available to customers over the internet. Users typically access these programs via a web browser or client application, paying a recurring subscription fee for the service. This eliminates the need for users to install, maintain, or update the software themselves.

Question 14: In cloud computing, the process of combining computer resources and making them available for shared access by numerous clients is known as:

Resource pooling (Correct answer)
On-demand self-service
Measured service
Broad network access

Correct answer: Resource pooling

Resource pooling is a fundamental characteristic of cloud computing, as defined by NIST. It refers to the provider's ability to combine computing resources, such as processing power, storage, and network bandwidth, to serve multiple consumers using a multi-tenant model. This allows for dynamic allocation and reallocation of resources based on demand, optimizing utilization and efficiency.

Question 15: An example of a remote server running a virtualized user OS is

VTC
VDI (Correct answer)
VPN
VDU

Correct answer: VDI

Virtual Desktop Infrastructure (VDI) is a technology that hosts desktop operating systems and applications on a centralized server in a data center. Users access these virtual desktops remotely from various client devices, such as thin clients or personal computers. This provides a consistent, managed, and secure user experience while centralizing data and administration.

Question 16: Which of the following enables several operating systems to run on the same hardware at the same time?

Clustering
Hyperthreading
Multitasking
Virtualization (Correct answer)

Correct answer: Virtualization

Virtualization is a technology that allows multiple operating systems and applications to run concurrently on a single physical hardware system. A hypervisor creates and manages isolated virtual machines (VMs), each with its own operating system, sharing the underlying hardware resources. This significantly improves resource utilization, flexibility, and scalability.

Question 17: Development that happens on a large number of virtual machines and necessitates the use of resources (typically administration related) to keep up with.

Hybrid Cloud
External Cloud
VM Sprawl (Correct answer)
emulation

Correct answer: VM Sprawl

VM Sprawl, or Virtual Machine Sprawl, describes a situation where an organization accumulates a large number of virtual machines that are not properly managed, monitored, or decommissioned. This can lead to inefficient resource utilization, increased administrative overhead, and potential security vulnerabilities. It's a common challenge in environments with extensive virtualization deployments.

Question 18: Users only pay for the computing capabilities used

Measured services (Correct answer)
On-demand self-service
Metered Cloud service
Non-metered

Correct answer: Measured services

Measured service is a key characteristic of cloud computing, meaning that cloud providers automatically monitor and control resource usage. This allows for transparency for both the provider and consumer, enabling billing based on actual consumption, similar to a utility bill. Users only pay for the specific computing capabilities they actually use, such as storage, bandwidth, or processing time.

CompTIA Practice Test Hardware #2

Which cooling mechanism keeps internal PC components at the lowest temperatures possible?