Computer Hardware
A technician installs a new DIMM, but the system only recognizes half the capacity. What’s the most likely cause?
The motherboard doesn’t support high-density RAM modules.
Which laser printer stage neutralizes leftover charges on the drum after printing?
The cleaning stage.
A laptop display shows faint images but no backlight. Which component is failing?
The inverter or LED backlight.
Which protocol uses port 23 and is considered insecure for remote access?
Telnet.
A PC powers on but the fans spin at max speed and no POST occurs. Which component is suspect?
The CPU or motherboard.
Which CPU socket type is used by modern Intel Core processors, and what distinguishes it from AMD sockets?
LGA (Land Grid Array); pins are on the socket, not the CPU.
A user reports vertical lines on every printout. Which component is most likely dirty or damaged?
The corona wire or drum.
A technician replaces a laptop’s Wi-Fi card. What must be reconnected besides the card itself?
The antenna wires.
A technician needs to segment a network logically without new hardware. Which technology is used?
VLANs.
A technician suspects a failing HDD. Which Windows tool can check for bad sectors?
CHKDSK
A workstation requires maximum throughput for video editing. Which RAID level provides striping without redundancy?
RAID 0.
In inkjet printers, what causes “banding,” and how is it resolved?
Misaligned print heads; resolved by calibration.
Which mobile device security feature uses TPM or Secure Enclave to protect encryption keys?
Hardware-based key storage.
Which IPv4 address class supports up to 16 million hosts per network
Class A.
A user reports their laptop shuts down when moved. What’s the likely cause?
Loose or failing power connector/DC jack.
A technician needs to install a GPU that requires 300W. The PSU has a single +12V rail rated at 20A. Will it work?
No, because 20A × 12V = 240W, insufficient for the GPU.
A technician finds toner scattered inside a printer. Which part has failed?
The transfer roller or toner cartridge seal.
A laptop supports both M.2 SATA and M.2 NVMe drives. How can you tell which is installed?
By checking the M.2 keying (B vs. M) and bus type in BIOS.
A user reports slow Wi-Fi speeds despite strong signal. Which setting should be checked first?
Channel interference or frequency band selection
A technician replaces RAM, but the system still fails to boot. What’s the next step?
Reseat RAM or test with known-good modules.
Which bus architecture allows multiple devices to communicate simultaneously without waiting for each other?
PCIe with point-to-point serial lanes.
Which laser printer stage uses a high-voltage static charge to attract toner particles to the drum?
The developing stage.
A user’s laptop won’t charge even with a new battery. Which motherboard component is most likely defective?
The DC jack or charging circuit.
Which protocol secures network communication by encrypting packets at the transport layer?
TLS (Transport Layer Security).
A PC boots but displays “NTLDR is missing.” What’s the most likely fix?
Repair boot files or restore bootloader from installation media.