A2: Switched-Mode Power Supply converts AC mains (230V) to low-voltage DC (3.3V, 5V, 12V) required by computer components.
Q1: What are the main components inside a CPU cabinet? A1: Motherboard, Processor (CPU), RAM, Hard Disk (HDD/SSD), SMPS (Power Supply), Graphics Card (optional), Cooling fans, and CMOS battery. it workshop lab viva questions and answers
A3: HDD uses magnetic platters and moving heads (slower, mechanical, cheaper per GB). SSD uses flash memory (faster, no moving parts, more expensive, durable). A2: Switched-Mode Power Supply converts AC mains (230V)
A5: Power-On Self-Test — a diagnostic process performed by BIOS/UEFI at startup to check hardware (RAM, disk, keyboard, etc.) before loading the OS. 🖥️ Section 2: Operating Systems (Windows & Linux) Q6: What is an Operating System? A6: System software that manages hardware resources, provides user interface, and allows application software to run. A3: HDD uses magnetic platters and moving heads
A23: Software emulation of a physical computer, allowing multiple OSes to run on one host (e.g., VirtualBox, VMware).
A22: Complementary Metal-Oxide-Semiconductor stores BIOS settings (date, time, boot order). The battery keeps these settings when PC is unplugged.
A8: Linux is open-source, free, highly customizable, uses kernel-based architecture, and has many distributions. Windows is proprietary, paid, user-friendly, and widely used for desktops.