Practice MCQs

Explanation: LAN (Local Area Network) is a network that connects computers in a limited area such as a home, office or building. WAN (Wide Area Network) covers a larger geographic area.

Explanation: HTTP (HyperText Transfer Protocol) is the foundation of the World Wide Web, used for transmitting web pages. HTTPS is the secure version using SSL/TLS encryption.

Explanation: A router forwards data packets between computer networks, directing internet traffic. It connects your home network (LAN) to the internet (WAN) and assigns local IP addresses.

Explanation: DNS (Domain Name System) is like the phone book of the internet — it translates human-readable domain names (google.com) into IP addresses (142.250.x.x).

Explanation: IP stands for Internet Protocol — a set of rules governing the format of data sent over the internet. Each device has an IP address for identification and routing.

Explanation: 1 terabyte = 1024 gigabytes (binary). In decimal (SI units), 1 TB = 1000 GB. Hard drive manufacturers often use decimal, while OS typically uses binary.

Explanation: GPU stands for Graphics Processing Unit. It handles rendering graphics and images. Modern GPUs are also used for AI, machine learning and scientific computing.

Explanation: A keyboard is an input device — it sends data to the computer. Output devices display results (e.g., monitor, printer). The CPU is the processing unit.

Explanation: RAM (Random Access Memory) is volatile temporary memory used by the computer to store data for currently running programs. It is much faster than a hard drive but loses data when power is off.

Explanation: An operating system (OS) is system software that manages computer hardware, software resources and provides services for programs. Examples: Windows, macOS, Linux.