Explanation

• LAN is ideal for connecting computers in closely located buildings, such as within a campus or office block.
• LAN stands for Local Area Network.
• It offers high speed and cost-effective connectivity over short distances.

Last verified on 19-04-2026

Explanation

• GUI stands for Graphical User Interface.
• It is a type of user interface that allows users to interact with electronic devices using icons, windows, menus, and buttons instead of typing commands.
• The first GUI was developed at Xerox PARC in the early 1980s.

Additional information:

• CLI – Command Line Interface
• CUI – Character User Interface
• VUI – Voice User Interface
• NUI – Natural User Interface

Last verified on 03-07-2026

Explanation

• RAM should be upgraded first if a computer lags while using different programs.
• RAM (Random Access Memory) stores data for programs that are currently running.
• Increasing RAM improves multitasking and overall system performance.

Additional information:

• Common RAM sizes: 4 GB, 8 GB, 16 GB, 32 GB, 64 GB
• Minimum for basic use: 4 GB
• Recommended for everyday multitasking: 8 GB
• Recommended for gaming/content creation: 16 GB
• High-end professional workloads: 32 GB or more

Last verified on 22-07-2026

Explanation

• A computer cannot boot properly if it does not have an Operating System (OS).
• The operating system is the main software that loads after the boot process and enables the computer to run programs.
• Without an OS, the computer cannot provide a usable working environment.

Last verified on 22-07-2026

Explanation

• An Operating System (OS) is system software.
• It manages computer hardware and provides a platform for running application software.
• It acts as an interface between the user and computer hardware.

Functions of an Operating System:

• Allocates resources
• Monitors activities
• Manages disks and files

Last verified on 02-07-2026