Hardware

445 questions

All types445 Multiple choice225 Multiple select101 Numeric6 Matching94 Ordering19

A technician is assembling a desktop workstation and has two matching 16 GB DDR4 memory modules. The motherboard contains four RAM slots labeled A1, A2, B1, and B2, representing memory Channel A and Channel B. To ensure the system operates in dual-channel mode as recommended by the motherboard documentation, which pair of slots should the technician populate?

Slots A2 and B2

Slots A1 and A2

Slots B1 and B2

Two SO-DIMM modules in slots A1 and B1

Show answer & explanation

Answer: Slots A2 and B2

Answer

Slots A2 and B2

Dual-channel memory operation requires installing matching RAM modules into separate memory channels. Populating one slot on Channel A (A2) and one slot on Channel B (B2) enables the system's memory controller to utilize dual-channel performance.

Step-by-Step Solution

Identify memory channel architecture rules.

Dual-channel operation requires installing matching memory modules across two distinct channels (Channel A and Channel B).

Distributing modules across channels allows the memory controller to communicate with both modules simultaneously over a 128-bit wide bus path.

Map motherboard slot designations to channels.

Slots designated with prefix A (A1, A2) belong to Channel A, while slots with prefix B (B1, B2) belong to Channel B.

Choosing one slot from Channel A (A2) and one slot from Channel B (B2) satisfies the dual-channel population requirement.

Verify memory module form factor compatibility.

Standard desktop motherboards require full-size DIMM modules.

Laptop SO-DIMM modules feature a smaller footprint and key notch positioning that will not fit full-size desktop motherboard slots.

Key Concept

Dual-Channel RAM Population and Form Factor Selection

Question 122Question →

A technician is sizing a power supply unit (PSU) for a dedicated video editing workstation. The workstation features the following components and estimated peak power requirements:
- Dual CPUs: $125\text{ W}$ TDP each
- Dual PCIe Graphics Cards: $165\text{ W}$ TDP each
- Motherboard, RAM, storage drives, and cooling fans combined: $120\text{ W}$

To ensure optimal efficiency and headroom, the technician specifies that total peak system draw must not exceed $70\%$ of the power supply's continuous wattage rating. What is the minimum continuous power supply output rating, in Watts, needed for this system?

Show answer & explanation

Answer: 1000

Answer

The minimum continuous power supply output rating required is

1000\text{ W}

Summing component power requirements yields

250\text{ W}

for dual CPUs (

2 \times 125\text{ W}

330\text{ W}

for dual GPUs (

2 \times 165\text{ W}

), and

120\text{ W}

for additional peripherals, totaling

700\text{ W}

. To maintain peak system draw at or below

70\%

of maximum PSU output, divide total draw by

0.70

\frac{700\text{ W}}{0.70} = 1000\text{ W}

Step-by-Step Solution

Calculate total system peak power consumption

700\text{ W}

Sum power draw across dual CPUs (

250\text{ W}

), dual GPUs (

330\text{ W}

), and system peripherals (

120\text{ W}

Calculate minimum PSU rating based on the 70% headroom target

1000\text{ W}

Divide the total power draw of

700\text{ W}

0.70

so that peak draw represents no more than 70% of continuous output.

Key Concept

Power supply wattage sizing and efficiency headroom calculations

Question 123Question →

An IT technician is setting up a workspace with a modern laptop and a 4K external monitor. The technician connects the laptop's USB Type-C port to the monitor's USB Type-C input using a spare USB-C cable that came with a phone charger. Although the monitor detects a power connection, it shows a 'No Signal' message. Replacing the cable with a DisplayPort Alt Mode capable USB-C cable resolves the issue and displays video. Which of the following best explains why the original cable failed to transmit video?

The charging cable lacks the internal high-speed data lanes necessary to transport DisplayPort video signals.

All physical USB Type-C ports require an external active signal converter inline to pass digital video protocols.

The monitor expects an analog RGB display signal, which standard USB Type-C cables filter out due to pin shielding.

Single-link USB Type-C cables cap resolution at 1080p and automatically disable output when connected to a 4K display.

Show answer & explanation

Answer: The charging cable lacks the internal high-speed data lanes necessary to transport DisplayPort video signals.

Answer

The charging cable lacks the internal high-speed data lanes necessary to transport DisplayPort video signals.

The USB Type-C connector is a physical format specification, whereas DisplayPort Alt Mode is a feature protocol requiring specific internal high-speed wiring. Charging cables bundled with small devices frequently contain only the wires needed for power delivery and USB 2.0 communication to keep manufacturing costs low and cables flexible. Without the high-speed differential pin lanes wired inside the cable, video signals cannot travel from the laptop to the display.

Step-by-Step Solution

Analyze the physical connector versus protocol requirements

Recognize that while USB Type-C is a universal physical form factor, individual cables vary in internal wiring and supported protocol capabilities.

Not all USB-C cables carry the physical wires needed for high-speed video data lanes.

Evaluate DisplayPort Alternate Mode (Alt Mode) specifications

Identify that transmitting video over USB-C relies on DisplayPort Alt Mode or Thunderbolt data lanes.

A cable dedicated solely to power delivery or USB 2.0 data transfer omits the extra shielded pairs required for video transport.

Determine the root cause of the display failure

Conclude that replacing the charging cable with a cable rated for DisplayPort Alt Mode restored the necessary physical data pathways.

The monitor receives power from basic USB-C wiring but requires high-speed lanes for the video payload.

Key Concept

USB Type-C Cable Capabilities and DisplayPort Alternate Mode

Question 124Question →

A technician is installing a new M.2 PCIe NVMe solid-state drive onto a motherboard. After installing the drive into an available M.2 slot and powering on the system, the drive is not detected in the UEFI/BIOS configuration. Documentation for the motherboard reveals that the specific M.2 slot utilized is keyed strictly as a B-key slot supporting SATA protocol only. Which of the following best explains why the drive is not recognized by the motherboard?

The M.2 slot provides interface connectivity for SATA only, whereas the NVMe drive requires PCIe lane routing available on M-key or B&M-key slots.

The installed NVMe drive requires a dedicated auxiliary 6-pin PCIe power cable from the power supply directly to the M.2 slot.

The M.2 drive must be paired with an identical drive in an adjacent slot to populate a dual-channel memory configuration.

The lack of drive detection during POST indicates that the operating system driver files have corrupted on the motherboard.

Show answer & explanation

Answer: The M.2 slot provides interface connectivity for SATA only, whereas the NVMe drive requires PCIe lane routing available on M-key or B&M-key slots.

Answer

The M.2 slot provides interface connectivity for SATA only, whereas the NVMe drive requires PCIe lane routing available on M-key or B&M-key slots.

The correct answer correctly identifies that M.2 slot keying determines protocol support. B-key slots generally route SATA throughput (or PCIe x2), whereas high-speed NVMe SSDs demand M-key slots connected to PCIe x4 lanes for proper hardware detection and operation.

Step-by-Step Solution

Identify the physical and logical requirements of the installed storage component.

The storage component is an M.2 PCIe NVMe SSD, which relies on PCIe lanes (typically x4) for data transfer.

NVMe protocol requires direct PCIe bus architecture rather than legacy SATA interfaces.

Compare the drive requirements against the specified motherboard M.2 slot specifications.

The motherboard slot is specified as B-key with SATA support only.

B-key M.2 slots are keyed differently (pins 12–19 missing) and historically limited to SATA or PCIe x2 interfaces, preventing an M-key NVMe PCIe x4 drive from functioning correctly.

Key Concept

M.2 Slot Keying and Protocol Compatibility

Estimated Time:1m 15s

Question 125Question →

A technician is preparing to install two additional memory modules into a standard desktop workstation motherboard that features four RAM slots and supports dual-channel DDR4 architecture. Which TWO of the following physical characteristics or installation rules must the technician follow to ensure proper dual-channel performance and hardware compatibility?

Select all that apply

Populate matching color-coded slots (such as Slot 1 and Slot 3) to enable dual-channel memory operation.

Verify that the replacement modules use the 288-pin DIMM form factor designed for desktop motherboards.

Populate adjacent motherboard slots (such as Slot 1 and Slot 2) to fill the primary memory bank first.

Select 260-pin SO-DIMM modules to fit standard desktop motherboard memory slots.

Show answer & explanation

Answer: Populate matching color-coded slots (such as Slot 1 and Slot 3) to enable dual-channel memory operation.; Verify that the replacement modules use the 288-pin DIMM form factor designed for desktop motherboards.

Answer

The technician must populate matching color-coded slots (such as Slot 1 and Slot 3) to enable dual-channel memory operation and verify that the replacement modules use the 288-pin DIMM form factor designed for desktop motherboards.

Dual-channel memory architecture requires memory modules to be placed into matching paired slots on separate memory channels (typically alternating, color-coded slots such as Slot 1 and Slot 3) to allow simultaneous 64-bit access across two channels. Additionally, desktop systems use full-length 288-pin DDR4 DIMM modules, whereas smaller 260-pin SO-DIMM modules are designed for laptops and compact systems.

Step-by-Step Solution

Determine physical form factor requirements for the desktop motherboard.

Standard desktop motherboards require 288-pin DDR4 DIMMs rather than 260-pin DDR4 SO-DIMMs.

SO-DIMM modules are compact form factors designed for laptops and will not fit full-sized desktop expansion slots.

Identify slot arrangement for dual-channel architecture.

Dual-channel operation requires installing modules across separate memory channels into matching paired slots (e.g., Slot 1 and Slot 3).

Installing modules into adjacent slots (Slot 1 and Slot 2) forces the memory controller to operate in single-channel mode.

Synthesize correct deployment requirements.

Selecting 288-pin DIMMs and populating matching alternating slots fulfills both physical compatibility and performance optimization objectives.

Both conditions are strictly required for a successful dual-channel desktop memory upgrade.

Key Concept

RAM Form Factors and Multi-Channel Slot Population Rules

Question 126Question →

An IT support technician needs to perform preventive maintenance on a thermal transfer label printer that is producing faint lines and streaks across printed shipping barcodes. Arrange the maintenance tasks in the correct sequential order from start to finish.

Drag items to arrange them in the correct order

Show answer & explanation

Answer

The correct sequence begins with powering off the device and allowing the printhead to cool, disengaging the latch to remove media and ribbon, cleaning the heating element and platen roller with isopropyl alcohol, reloading consumables through the media path, and finally securing the printhead latch, restoring power, and executing a media calibration.

Thermal printer preventive maintenance follows a logical workflow centered on technician safety, component access, targeted cleaning, reassembly, and sensor alignment. Disconnecting power and cooling the assembly comes first to avoid thermal burns. Removing media allows direct cleaning of the printhead heating elements with high-purity isopropyl alcohol. Once clean and dry, reloading consumables and locking the latch enables accurate post-maintenance sensor calibration.

Step-by-Step Solution

Turn off power and permit the thermal printhead to cool.

Eliminates thermal burn risks and potential electrical hazards.

Thermal printheads reach high temperatures during active printing and must reach ambient temperature before direct technician contact.

Unlatch the mechanism and remove the loaded ribbon and label media.

Unobstructed access to internal heating elements and rollers.

Consumables block access to the printhead and platen roller.

Wipe the printhead elements and platen roller with a 99% isopropyl alcohol swab.

Dissolves and removes built-up wax, resin, adhesives, and dust.

Accumulated foreign material prevents heat from transferring effectively from elements to the thermal ribbon.

Reload label media and thermal transfer ribbon through sensors and rollers.

Prepares the mechanical path for operational feeding.

Proper routing is required to ensure consistent tension and alignment during print operations.

Latch the printhead, turn on power, and perform media sensor calibration.

Synchronizes gap/black-mark sensors with media dimensions.

Calibration ensures precise label positioning and prevents alignment drift.

Key Concept

Thermal Printer Consumables Maintenance Sequence

Estimated Time:1m 30s

Question 127Question →

A technician is installing a PCIe x4 RAID controller expansion card rated at $35\text{ W}$ TDP into a desktop workstation. The card has no external auxiliary power connectors on its PCB. The motherboard features an available physical PCIe x16 slot (wired electrically at x4) and several PCIe x1 slots. Which of the following is the most appropriate installation approach to ensure the card operates correctly?

Install the expansion card directly into the physical PCIe x16 (wired x4) slot, as motherboard PCIe x4/x16 slots can provide up to

75\text{ W}

of power directly through the slot interface.

Upgrade the system power supply unit (PSU) to a modular model, as any expansion card consuming over

25\text{ W}

requires a dedicated

+12\text{ V}

EPS power cable.

Connect an 8-pin PCIe auxiliary power cable from the power supply directly into the card's PCIe bus edge connector before inserting it into the slot.

Modify the card using a PCIe x1 riser adapter to fit into a PCIe x1 slot, as all PCIe slots provide identical power delivery regardless of slot length.

Show answer & explanation

Answer: Install the expansion card directly into the physical PCIe x16 (wired x4) slot, as motherboard PCIe x4/x16 slots can provide up to $75\text{ W}$ of power directly through the slot interface.

Answer

Install the expansion card directly into the physical PCIe x16 (wired x4) slot, as motherboard PCIe x4/x16 slots can provide up to

75\text{ W}

of power directly through the slot interface.

PCI Express expansion slots on desktop motherboards are designed to deliver power directly to installed cards. Standard x4, x8, and x16 full-height slots can deliver up to

75\text{ W}

of power. Since the RAID controller card requires

35\text{ W}

and has no auxiliary power headers, placing it in the physical PCIe x16 (wired x4) slot ensures sufficient electrical power and full x4 lane performance.

Step-by-Step Solution

Evaluate the power requirements of the expansion card

The RAID controller requires

35\text{ W}

of power and lacks auxiliary power input headers.

Cards without auxiliary connectors rely entirely on motherboard slot power.

Check motherboard PCIe slot power delivery standards

Full-height PCIe x4, x8, and x16 motherboard slots are standardized to deliver up to

75\text{ W}

of power directly via the slot connectors.

The

35\text{ W}

draw falls well below the

75\text{ W}

limit of the physical PCIe x16 (wired x4) slot.

Select the proper physical slot for installation

Inserting the PCIe x4 card into the physical PCIe x16 (wired x4) slot provides both full mechanical fit, maximum electrical bandwidth, and adequate power delivery without extra cables or PSU modifications.

PCIe slots support down-plugging where smaller cards operate seamlessly in larger physical slots.

Key Concept

PCI Express Bus Power Limits and Mechanical Compatibility

Question 128Question →

A digital artist reports that after upgrading to a high-end monitor capable of 4K resolution at a 144 Hz refresh rate, the display caps out at 1080p resolution and occasionally flickers. Upon inspection, the technician discovers the monitor is connected using a standard single-link DVI cable through a passive DVI-to-HDMI adapter into an older legacy video port on the workstation. Which TWO of the following solutions should the technician implement to enable full 4K resolution at 144 Hz? (Select TWO.)

Select all that apply

Connect the display using a native DisplayPort 1.4 or higher cable directly from the dedicated graphics card to the monitor.

Replace the single-link DVI cable with a passive DVI-D to HDMI adapter while keeping the original DVI port connection.

Connect the display using an Ultra High Speed HDMI 2.1 cable attached to a supported HDMI 2.1 output on the graphics card.

Swap the DVI cable with a standard USB Type-C device charging cable connected to an available USB 2.0 host port.

Show answer & explanation

Answer: Connect the display using a native DisplayPort 1.4 or higher cable directly from the dedicated graphics card to the monitor.; Connect the display using an Ultra High Speed HDMI 2.1 cable attached to a supported HDMI 2.1 output on the graphics card.

Answer

To achieve 4K resolution at 144 Hz, the technician must replace the bottlenecked single-link DVI connection with either a native DisplayPort 1.4 (or higher) cable or an Ultra High Speed HDMI 2.1 cable connected to a compatible graphics card port.

High-resolution and high-refresh-rate displays such as 4K at 144 Hz require modern video standards capable of high bandwidth. DisplayPort 1.4 (and newer) as well as HDMI 2.1 provide the required throughput to support 4K@144Hz. Therefore, using a native DisplayPort 1.4+ cable or an Ultra High Speed HDMI 2.1 cable directly connected to a compatible graphics card interface correctly resolves the issue.

Step-by-Step Solution

Analyze video bandwidth requirements

Determined that 4K at 144 Hz requires high data throughput exceeding legacy DVI standards.

Single-link DVI is capped at 1920x1200 at 60 Hz, causing resolution drops and instability.

Evaluate modern display interfaces

Identified DisplayPort 1.4+ and HDMI 2.1 as supported interfaces for 4K 144 Hz video output.

Both interfaces provide the required throughput (up to 32.4 Gbps for DP 1.4 with DSC and 48 Gbps for HDMI 2.1).

Select correct cabling solutions

Chosen direct connections using DisplayPort 1.4+ or Ultra High Speed HDMI 2.1 cables without passive legacy adapters.

Direct connections eliminate adapter bottlenecks and ensure full feature set support.

Key Concept

Display Cable Bandwidth and Compatibility Standards

Question 129Question →

A technician is installing a replacement motherboard into a desktop tower and connecting the chassis front panel cabling to the system board headers. Which of the following statements accurately describe the installation requirements and operational characteristics of motherboard front panel headers? (Select TWO.)

Select all that apply

Power switch (PWR_SW) and reset switch (RESET_SW) connections operate as momentary contact switches and function properly regardless of positive or negative pin orientation.

The front panel reset switch (RESET_SW) header supplies continuous +12V DC power to retain system BIOS/UEFI settings when the power supply is turned off.

Front panel status light-emitting diodes, such as the hard drive activity LED (HDD_LED) and power LED (PWR_LED), are polarity-sensitive and require correct positive (+) and negative (-) pin alignment to illuminate.

A standard 19-pin internal USB 3.0 front panel cable can plug directly into a legacy 9-pin USB 2.0 motherboard header without an adapter.

Show answer & explanation

Answer: Power switch (PWR_SW) and reset switch (RESET_SW) connections operate as momentary contact switches and function properly regardless of positive or negative pin orientation.; Front panel status light-emitting diodes, such as the hard drive activity LED (HDD_LED) and power LED (PWR_LED), are polarity-sensitive and require correct positive (+) and negative (-) pin alignment to illuminate.

Answer

Power switch and reset switch connections function regardless of pin polarity, while front panel status LEDs (HDD_LED and PWR_LED) require correct positive and negative pin alignment to illuminate.

Power and reset switches are simple momentary contact switches that briefly bridge two pins to send a signal to the power management controller, so their pin orientation (+/- polarity) does not affect operation. In contrast, LEDs (light-emitting diodes) are directional semiconductors that require current to flow from the positive (+) anode to the negative (-) cathode, making correct pin alignment mandatory for the lights to function.

Step-by-Step Solution

Analyze the electrical characteristics of motherboard switch headers.

PWR_SW and RESET_SW use simple push-button momentary switches that short two pins together briefly to send a logic signal. Because no directional current flow is required for the switch mechanism, orientation does not matter.

Momentary switches complete an open circuit irrespective of polarity.

Analyze the electrical characteristics of motherboard LED headers.

HDD_LED and PWR_LED connect to light-emitting diodes. Diodes conduct current in only one direction (anode to cathode), so connecting them backwards prevents current flow and keeps the LED off.

Light-emitting diodes are polarity-sensitive semiconductors.

Evaluate the incorrect distractor statements regarding power delivery and USB header compatibility.

Reset headers do not deliver power to BIOS/UEFI chips, and 19-pin USB 3.0 front panel cables are physically incompatible with 9-pin USB 2.0 headers without an adapter.

Identifies wrong options based on incorrect motherboard pinout definitions and power roles.

Key Concept

Motherboard front panel header pinouts, polarity requirements for LEDs vs switches, and internal USB connector standards

Question 130Question →

A field service technician is servicing a compact all-in-one ticketing kiosk experiencing system slowdowns. Upon opening the chassis, the technician observes that the motherboard utilizes smaller memory expansion slots designed for space-constrained hardware rather than standard full-length desktop slots. Which memory module form factor must the technician select to perform a hardware upgrade on this system?

SO-DIMM

Standard 288-pin DIMM

M.2 PCIe module

Adjacent dual-channel DIMM

Show answer & explanation

Answer: SO-DIMM

Answer

The correct form factor for space-constrained hardware such as laptops and compact kiosks is SO-DIMM (Small Outline Dual In-line Memory Module).

SO-DIMM (Small Outline DIMM) is the standard memory module form factor used in laptops, small-form-factor (SFF) PCs, and compact all-in-one kiosks due to its reduced physical footprint compared to standard desktop DIMMs.

Step-by-Step Solution

Identify the physical constraints described in the scenario.

The motherboard contains smaller memory slots designed for space-constrained compact hardware.

Compact platforms cannot accommodate full-sized desktop memory modules due to physical size limitations.

Compare memory form factors against the physical slot requirements.

SO-DIMM modules are specifically designed with a smaller footprint (roughly half the length of standard DIMMs) for laptop and compact motherboard applications.

Selecting SO-DIMM ensures proper physical seating, pin count alignment, and mechanical notch keying.

Key Concept

RAM Form Factors (DIMM vs. SO-DIMM)

Estimated Time:1m 0s

Question 131Question →

A desktop support technician is troubleshooting a high-volume color inkjet printer that is producing output with evenly spaced horizontal blank lines across printed images and text. The ink level indicator shows that all ink cartridges are more than half full. Which of the following maintenance steps should the technician perform first to resolve this print defect?

Execute a printhead nozzle cleaning cycle using the printer's utility menu.

Replace the fuser unit assembly to ensure ink proper thermal bonding.

Perform a hard factory reset to clear corrupt print spooler cache memory.

Calibrate the optical drum unit corona wire charging voltage.

Show answer & explanation

Answer: Execute a printhead nozzle cleaning cycle using the printer's utility menu.

Answer

The technician should execute a printhead nozzle cleaning cycle using the printer's utility menu.

In inkjet printing, dried ink can accumulate inside the microscopic nozzles of the printhead, preventing ink droplets from reaching the page and creating horizontal white lines across printouts. Executing a printhead nozzle cleaning cycle clears dried ink buildup using pressurized ink flow.

Step-by-Step Solution

Analyze the reported symptom and printer technology type.

Identified horizontal blank lines on an inkjet printer with sufficient ink levels.

Horizontal streaks or missing lines on inkjet output indicate dried ink blocking one or more printhead nozzles.

Select the appropriate non-hardware-replacement maintenance step.

Initiate a built-in printhead cleaning routine.

Automated cleaning routines prime the printhead and push ink through the nozzles to dissolve obstructions before replacing hardware components.

Key Concept

Inkjet Printer Consumables Maintenance and Nozzle Troubleshooting

Question 132Question →

A desktop technician is upgrading a workstation by installing a dedicated PCIe x16 graphics card with a peak draw of $220\text{ W}$ and a PCIe x4 multi-port capture card rated at $20\text{ W}$ . The host CPU requires $105\text{ W}$ , while remaining peripherals consume $45\text{ W}$ . Which of the following technical precautions and installation requirements must be met to ensure hardware compatibility and stable power delivery? (Select TWO.)

Select all that apply

Auxiliary power to the graphics card must be supplied using dedicated PCIe power cables rather than EPS12V cables.

The power supply unit capacity should be selected matching the exact combined component TDP total of

390\text{ W}

without additional power overhead.

The total sustained output on the +12V rail must accommodate peak system draw plus a safety headroom margin.

The PCIe x4 capture card requires a dedicated PCIe x4 slot and cannot physically or electrically function in a PCIe x16 slot.

Show answer & explanation

Answer: Auxiliary power to the graphics card must be supplied using dedicated PCIe power cables rather than EPS12V cables.; The total sustained output on the +12V rail must accommodate peak system draw plus a safety headroom margin.

Answer

The technician must ensure auxiliary power to the graphics card uses dedicated PCIe power cables (not EPS12V) and verify that the power supply's +12V rail provides adequate capacity including a safety headroom margin.

Dedicated high-draw graphics cards require auxiliary PCIe power cables, as EPS12V connectors carry a different pinout intended for CPU sockets. Additionally, PSUs must be selected with sufficient +12V output capacity and safety headroom above the aggregate peak consumption to guarantee stable operations.

Step-by-Step Solution

Calculate component power demands and continuous headroom requirements

Total peak consumption is

220\text{ W} + 20\text{ W} + 105\text{ W} + 45\text{ W} = 390\text{ W}

. A power supply must provide continuous capacity above this value (typically 20%–30% overhead margin) primarily on the +12V rail.

Calculated total power draws require extra headroom to account for transient power spikes and capacitor degradation.

Identify correct PSU cable connectors for auxiliary card power

Use 6-pin or 8-pin (6+2 pin) PCIe power cables for the dedicated GPU.

Connecting EPS12V cables into GPU ports damages hardware due to reversed power and ground pin layout.

Verify PCIe slot backward/forward compatibility rules

PCIe x4 cards fit and function normally in PCIe x4, x8, or x16 slots.

PCIe standards explicitly support up-plugging smaller cards into larger physical slots.

Key Concept

Power supply sizing considerations (+12V headroom margin, cable connector identification) and PCIe expansion slot physical/electrical compatibility.

Question 133Question →

A technician is setting up a desktop workstation for video editing. The motherboard features one primary PCIe x16 expansion slot wired electrically at x16 and a secondary full-length PCIe x16 expansion slot wired electrically at x4. The technician installs a dual-slot PCIe x16 graphics card in the primary slot. Which of the following components can be installed into the secondary expansion slot without encountering physical keying or mechanical fit issues?

A PCIe x4 dedicated network interface card

A legacy PCI sound expansion card

An M.2 2280 NVMe solid-state drive directly inserted into the slot

A dual-channel SO-DIMM memory expansion module

Show answer & explanation

Answer: A PCIe x4 dedicated network interface card

Answer

A PCIe x4 dedicated network interface card can be physically and operationally installed into the secondary full-length PCIe slot.

PCI Express expansion slots support backward physical compatibility. A card with fewer lanes (such as a PCIe x4 card) can be physically inserted into any larger mechanical slot (such as a x16 slot). Because the secondary slot is wired electrically for x4 speed, the x4 network card will function at its maximum rated bandwidth.

Step-by-Step Solution

Analyze the physical and electrical specifications of the secondary slot.

The slot is mechanically a full-length PCIe x16 slot, but electrically wired for x4 lanes.

PCI Express standards support upward compatibility where smaller pin-count cards (x1, x4, x8) fit physically and function correctly inside larger mechanical slots.

Evaluate the candidate expansion cards against the slot dimensions and connector keying.

A PCIe x4 card fits cleanly into a full-length x16 slot and operates at full x4 speed.

Smaller PCIe cards leave unused pin pads in longer PCIe slots without affecting electrical operation.

Key Concept

PCIe Mechanical vs. Electrical Lane Compatibility

Question 134Question →

A desktop support technician is connecting a workstation's graphics card featuring a DisplayPort output to an older high-resolution monitor that only accepts a Dual-Link DVI-D input. The technician uses a standard passive DisplayPort-to-DVI adapter cable. While the monitor powers on and displays an image, the maximum available resolution in the operating system is limited to $1920 \times 1200$ , failing to reach the monitor's native $2560 \times 1600$ resolution. Which of the following is the primary cause of this resolution limitation?

Passive DisplayPort-to-DVI adapters operate in single-link mode, limiting maximum clock rates and available bandwidth.

DisplayPort natively outputs an analog signal that must be actively digitised before DVI-D inputs can process high resolutions.

The adapter cable relies on a USB Type-C physical connector that lacks DisplayPort Alternate Mode pinouts for high-bandwidth video transmission.

Single-link DVI cables support up to 4K resolution, but require an updated motherboard BIOS to unlock high-refresh modes.

Show answer & explanation

Answer: Passive DisplayPort-to-DVI adapters operate in single-link mode, limiting maximum clock rates and available bandwidth.

Answer

Passive DisplayPort-to-DVI adapters operate in single-link mode, limiting maximum clock rates and available bandwidth.

DisplayPort Dual-Mode (DP++) natively allows passive adapters to pass single-link DVI/HDMI signals. However, single-link DVI is capped at

1920 \times 1200

resolution. To output

2560 \times 1600

, dual-link DVI signal rates are required, which can only be achieved from a DisplayPort host using a powered active adapter that actively converts the video signal.

Step-by-Step Solution

Identify the physical interface and adapter type being used.

The technician is using a passive DisplayPort-to-DVI adapter cable.

Passive adapters rely on DisplayPort Dual-Mode (DP++) to output DVI signals directly through simple wire pin mapping.

Determine the bandwidth limitations of passive DVI conversion.

Passive DVI conversion is limited strictly to DVI Single-Link bandwidth.

DVI Single-Link maxes out at a resolution of

1920 \times 1200

60\text{ Hz}

due to hardware clock signal constraints.

Identify the correct hardware component required for dual-link resolutions.

An active DisplayPort-to-DVI Dual-Link adapter powered via USB or an external power source is required to drive

2560 \times 1600

Active adapters contain internal chipset logic to convert DisplayPort packeted data into true dual-link TDMS signals required for higher bandwidth.

Key Concept

DisplayPort Passive vs Active Adapters and DVI Single-Link vs Dual-Link Bandwidth

Question 135Question →

A systems technician is configuring hardware components for laptop, desktop, and server deployments. Match each RAM form factor or technical specification on the left with its primary physical characteristic or operational requirement on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

SO-DIMM Form Factor pairs with the compact physical footprint for mobile/laptop devices; ECC Memory pairs with the 72-bit bus width for detecting and correcting single-bit server errors; Dual-Channel Architecture pairs with populating matching modules in designated motherboard slots; DDR5 PMIC Integration pairs with onboard voltage regulation on the memory module.

Each RAM specification directly corresponds to its design requirement: SO-DIMMs accommodate space-constrained laptops, ECC uses a 72-bit bus width for error correction, dual-channel requires matching paired slots for double bandwidth, and DDR5 PMIC shifts power management directly onto the RAM module.

Step-by-Step Solution

Identify the physical form factor suited for mobile hardware.

SO-DIMM modules provide the smaller physical footprint required for laptops and mini-PCs.

Standard desktop DIMMs are too long and wide to fit within compact laptop enclosures.

Analyze error-checking mechanisms used in server environments.

ECC memory utilizes 72-bit bus width (incorporating extra parity bits) to detect and resolve memory errors.

Non-ECC memory operates on a standard 64-bit bus and cannot correct data corruption on the fly.

Determine throughput requirements for multi-channel memory controller configurations.

Dual-channel operation requires installing matching memory modules across separate memory channels in paired motherboard slots.

Populating a single channel forces the system to run in single-channel mode, halving potential memory throughput.

Evaluate key architectural updates introduced in DDR5 memory.

DDR5 modules include an integrated PMIC on the module PCB to regulate DC voltage directly.

DDR4 and earlier generations relied entirely on motherboard voltage regulator modules (VRMs).

Key Concept

RAM Form Factors, Error Detection, and Architectural Characteristics

Question 136Question →

An IT technician is performing scheduled preventive maintenance on a high-volume departmental electrophotographic (EP) laser printer after reaching its specified page count threshold. Which of the following components are typically included in a standard laser printer maintenance kit and should be replaced during this procedure? (Select TWO.)

Select all that apply

Transfer roller

Fuser assembly

HVPS (High-Voltage Power Supply) circuit board

Laser scanning assembly unit

Show answer & explanation

Answer: Transfer roller; Fuser assembly

Answer

The technician should replace the transfer roller and the fuser assembly.

Standard laser printer maintenance kits consist of components that wear out predictably under friction, movement, and heat, such as pickup/feed rollers, transfer rollers, and fuser assemblies.

Step-by-Step Solution

Identify the high-wear mechanical and thermal components included in standard EP laser printer preventive maintenance kits.

Maintenance kits focus on paper-path consumables such as pickup/pickup-feed rollers, separation pads, transfer rollers, and fuser assemblies.

These specific components experience high friction, surface deterioration, and heat exposure that cause predictable degradation after a fixed page count.

Distinguish routine maintenance items from permanent printer hardware.

Internal electronics like the High-Voltage Power Supply (HVPS) and optical scanner units are non-consumable assemblies.

Permanent internal sub-assemblies are repaired or replaced only when active hardware diagnostic errors occur, not during routine preventive servicing.

Key Concept

Laser printer preventive maintenance kit components

Question 137Question →

A technician is preparing specs for several custom PC builds requiring specific motherboard form factors and power configurations. Match each motherboard form factor or connector on the left with its corresponding physical dimension or functional specification on the right.

Click a left item, then click its matching right item

Show answer & explanation

Answer

ATX Form Factor matches 12 × 9.6 inches (up to 7 expansion slots); Micro-ATX Form Factor matches 9.6 × 9.6 inches (up to 4 expansion slots); Mini-ITX Form Factor matches 6.7 × 6.7 inches (1 expansion slot); 24-pin P1 Connector matches providing main

+3.3\text{V}

+5\text{V}

, and

\pm 12\text{V}

power to the motherboard.

Each motherboard specification correctly pairs with its official dimension/expansion standard or electrical power delivery role: ATX (

12 \times 9.6

in, 7 slots), Micro-ATX (

9.6 \times 9.6

in, 4 slots), Mini-ITX (

6.7 \times 6.7

in, 1 slot), and 24-pin P1 (primary DC voltages to system board).

Step-by-Step Solution

Identify the standard dimensions and expansion slot limits for common motherboard form factors.

ATX is standard full-size (

12 \times 9.6

in, 7 slots), Micro-ATX is square (

9.6 \times 9.6

in, 4 slots), and Mini-ITX is small form factor (

6.7 \times 6.7

in, 1 slot).

CompTIA A+ objectives require memorization of dimensions and expansion limits for ATX family form factors.

Identify the main power connector specification.

The 24-pin P1 ATX connector supplies primary motherboard voltages (

+3.3\text{V}

+5\text{V}

\pm 12\text{V}

Differentiates primary system board power delivery from auxiliary CPU (EPS12V) and GPU (PCIe) power connectors.

Key Concept

Motherboard Form Factors, Dimensions, and Power Connectors

Question 138Question →

A technician is installing a dedicated PCIe expansion card with a total rated power draw of $150\text{ W}$ . The motherboard slot delivers up to $75\text{ W}$ through the PCIe bus. Which auxiliary power connection must be connected from the power supply unit (PSU) to fulfill the expansion card's remaining power requirement?

A 6-pin PCIe power cable, which provides up to

75\text{ W}

of supplemental +12V power.

An 8-pin EPS12V power cable, which supplies +12V power intended for expansion card slots.

A 4-pin SATA power connector, which supplies

75\text{ W}

of dedicated power to PCIe cards.

No auxiliary cable is needed, as PCIe x16 motherboard slots automatically scale bus power up to

300\text{ W}

Show answer & explanation

Answer: A 6-pin PCIe power cable, which provides up to $75\text{ W}$ of supplemental +12V power.

Answer

A 6-pin PCIe power cable must be connected to provide the remaining

75\text{ W}

of supplemental power required by the expansion card.

PCIe slots deliver a maximum of

75\text{ W}

through the motherboard bus. A card requiring

150\text{ W}

needs an additional

75\text{ W}

, which is precisely provided by a single 6-pin PCIe auxiliary power connector (

75\text{ W}

capacity).

Step-by-Step Solution

Determine the maximum power supplied by the motherboard bus

The PCIe x16 slot supplies up to

75\text{ W}

directly through the slot connectors.

PCIe standard specifications cap motherboard slot power delivery at

75\text{ W}

Calculate the supplemental wattage requirement

150\text{ W} - 75\text{ W} = 75\text{ W}

needed from auxiliary power.

Subtracting slot power capability from total TDP yields the additional power required.

Select the appropriate PSU connector for

75\text{ W}

auxiliary power

A 6-pin PCIe power connector supplies up to

75\text{ W}

of +12V power.

A 6-pin PCIe power cable is rated for

75\text{ W}

, making it the exact requirement for a

150\text{ W}

card.

Key Concept

PCIe Auxiliary Power Connector Ratings and Slot Power Limits

Question 139Question →

A desktop motherboard features four memory slots labeled DIMM_A1, DIMM_A2, DIMM_B1, and DIMM_B2, where slots labeled 'A' belong to Memory Channel A and slots labeled 'B' belong to Memory Channel B. A single module is currently installed in slot DIMM_A1. To achieve dual-channel throughput when adding a second identical module, into which slot should the new RAM module be installed?

DIMM_B1

DIMM_A2

A standard SO-DIMM module installed via an adapter into DIMM_A2

DIMM_A2 or DIMM_B2 interchangeably, because dual-channel mode automatically activates whenever two identical modules are inserted into any open slots

Show answer & explanation

Answer: DIMM_B1

Answer

The new RAM module must be installed into slot DIMM_B1 to pair Channel A (DIMM_A1) with Channel B (DIMM_B1) for dual-channel operation.

Dual-channel memory technology doubles communication bandwidth between the memory controller and RAM by utilizing two separate 64-bit buses simultaneously. To enable dual-channel operation, matching memory modules must be installed into corresponding slots of separate memory channels (in this case, DIMM_A1 on Channel A and DIMM_B1 on Channel B).

Step-by-Step Solution

Identify the existing memory channel allocation.

Slot DIMM_A1 is currently occupied on Memory Channel A.

Dual-channel architecture requires simultaneous access to two independent memory channels.

Determine the corresponding slot on the second memory channel.

Slot DIMM_B1 is the corresponding primary slot on Memory Channel B.

Populating matching slot positions across Channel A and Channel B activates multi-channel memory controller interleaving.

Key Concept

Dual-Channel RAM Slot Population Rules

Estimated Time:1m 0s

Question 140Question →

A helpdesk technician is dispatched to inspect a office laser printer that produces output pages with solid black sheets across the entire printable area on every document. Which electrophotographic (EP) printing component has most likely failed or lost its primary electrical charge?

Primary charge roller

Fuser assembly pressure roller

Transfer roller

Laser scanning assembly mirror

Show answer & explanation

Answer: Primary charge roller

Answer

The primary charge roller is the defective component causing solid black pages.

In electrophotographic (EP) laser printers, the primary charge roller (or primary corona wire) is responsible for applying a uniform high negative voltage to the photosensitive drum during the conditioning phase. If the primary charge roller fails to supply this negative charge, the drum surface retains no charge. The developer roller then deposits toner onto the entire drum surface, resulting in a completely black printed page.

Step-by-Step Solution

Analyze the reported symptom in the electrophotographic (EP) printing process.

The printer outputs pages covered entirely in solid black toner.

Toner is electrostatically attracted to any area on the photosensitive drum that lacks a strong negative charge.

Evaluate the function of the primary charge roller during the conditioning stage.

The primary charge roller applies a uniform negative charge (approx. -600V) across the drum surface to prevent toner attraction until targeted by the laser.

If the primary charge roller fails, the drum remains at ground potential, allowing toner from the developer roller to cling to the entire drum.

Distinguish from other EP failure modes.

Failure of the transfer roller or laser unit leads to blank pages, while fuser failures lead to unbonded smudging.

Understanding component roles confirms that loss of primary charge is the sole cause of total black page output.

Key Concept

Electrophotographic (EP) Laser Printing Process & Charging Stage

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