Desktops & PCs questions and answers
Desktop hardware, displays, power supplies, peripherals and PC upgrades.
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Questions and clear answers
01Hardware · foundation · Editorial previewWhat is the function of a PC power supply?+
The power supply converts input electricity into regulated power for the computer's components.
02Upgrades · foundation · Editorial previewWhy check CPU socket compatibility?+
A processor must match the motherboard socket and be supported by its chipset and firmware.
03Graphics · foundation · Editorial previewWhat is integrated graphics?+
Graphics hardware built into the CPU or system chip instead of a separate dedicated GPU board.
04Cooling · foundation · Editorial previewWhy does desktop case airflow matter?+
Moving air helps remove heat from the CPU, GPU and other components to keep temperatures safe.
05PSU power · advanced · Editorial previewIn desktops pcs — PSU power: A device draws 10 watts for 15 hours. How much energy is used in Wh?+
Energy = power × time = 10 × 15 = 150 Wh.
06PC storage · foundation · Editorial previewIn desktops pcs — PC storage: A pc storage activity has 565 files using 17 MB each and 28 MB of extra files. Find total storage.+
Total = 565 × 17 + 28 = 9633 MB, before filesystem overhead.
07Memory upgrades · foundation · Editorial previewIn desktops pcs — Memory upgrades: A laptop named Model-1364 uses DDR4-only memory slots. Can a DDR5 module be inserted as a compatible replacement?+
No. DDR4 and DDR5 have different physical and electrical specifications; inspect the exact device's supported memory before upgrading.
08CPU workloads · intermediate · Editorial previewIn desktops pcs — CPU workloads: A workload performs 2163 independent tasks, each taking 8 seconds sequentially. How many seconds in total?+
Sequential time = 2163 × 8 = 17304 seconds (parallelism not assumed).
09Displays · foundation · Editorial previewIn desktops pcs — Displays: A screen or image is 7960 px wide and 150 px high. How many pixels does it contain?+
Pixels = 7960 × 150 = 1194000.
10GPU performance · advanced · Editorial previewIn desktops pcs — GPU performance: At a constant 110 frames per second, how many frames are displayed over 16 seconds?+
Frames = 110 × 16 = 1760 frames.
11Case cooling · intermediate · Editorial previewIn desktops pcs — Case cooling: A laptop becomes hotter during a 4560-minute workload while resting on a thick blanket. What should change first?+
Move it to a flat ventilated surface and clear vents; blocked airflow can raise temperatures and reduce performance.
12Port compatibility · foundation · Editorial previewIn desktops pcs — Port compatibility: A USB-C laptop port is labeled only 'USB-C' on model Test-360. Can you infer it supports video output?+
No. USB-C defines a connector shape; video, charging and speed capabilities depend on the device's specifications.
13Backups · foundation · Editorial previewIn desktops pcs — Backups: A backup plan covers 1159 GB and a verified copy stores 20 GB. How much has not yet been copied?+
Uncopied amount = 1159 − 20 = 1139 GB (assuming the same units and no duplicate data).
14Network transfers · intermediate · Editorial previewIn desktops pcs — Network transfers: A network transfers transfer sends 15664 megabits at a steady 4 megabits/second. Find ideal transfer time.+
Time = size/rate = 15664/4 ≈ 3916 seconds, ignoring protocol overhead.
15Safety · advanced · Editorial previewIn desktops pcs — Safety: An email asks the owner of device 2757 to install a 'security fix' from an unknown link. What should they do?+
Do not install it. Verify updates through the official vendor or operating system, and independently check the sender and domain.
16Building PCs · foundation · Editorial previewIn desktops pcs — Building PCs: A player owns game Product-3556 for an older console. Can they assume it runs on every new console from the same brand?+
No. Backward compatibility is platform- and title-specific; verify on the manufacturer's official compatibility list.
17PSU power · intermediate · Editorial previewIn desktops pcs — PSU power: A device draws 2 watts for 14 hours. How much energy is used in Wh?+
Energy = power × time = 2 × 14 = 28 Wh.
18PC storage · foundation · Editorial previewIn desktops pcs — PC storage: A pc storage activity has 155 files using 9 MB each and 43 MB of extra files. Find total storage.+
Total = 155 × 9 + 43 = 1438 MB, before filesystem overhead.
This is an educational practice preview. Answers and board-specific alignment are undergoing editorial review; these are not official exam questions.