Explanation

• Wide Area Network (WAN) covers a large geographic area, such as a country or multiple countries.
• WAN connects multiple LANs and MANs through public or private communication links.
• The Internet is the world's largest example of a WAN.
• WAN is commonly used by governments, businesses, banks, and multinational organizations.
• It enables long-distance communication and data sharing.

Last verified on 01-08-2026

Explanation

• Monitor and Speaker are output devices.
• Because they display visual information and produce sound instead of sending data to the computer

• Input devices are used to enter data and instructions into a computer.
• Output devices present the processed information to the user.
• Common input devices: Keyboard, Mouse, Scanner, Microphone, Joystick
• Common output devices: Monitor, Speaker, Printer, Projector, Plotter

Last verified on 01-08-2026

Explanation

• The primary function of an Operating System kernel is to manage hardware and system resources.
• It acts as a bridge between hardware and software applications.
• Kernel controls CPU, memory, and input/output devices.
• It ensures smooth execution of all programs.
• It is the core part of the operating system.

Last verified on 09-06-2026

Explanation

• The dollar sign ($) is used to create an absolute cell reference in MS Excel.

Additional information:

• Absolute Reference: $D$2 (Row and column fixed)
• Relative Reference: D2 (Row and column change)
• Mixed Reference: $D2 (Column fixed)
• Mixed Reference: D$2 (Row fixed)
• Shortcut Key: F4 toggles between reference types.

Last verified on 18-07-2026

Explanation

• Slide Sorter View is used to sort, rearrange, copy, and delete slides in Microsoft PowerPoint.
• It displays all slides as thumbnails on one screen.
• You can easily drag and drop slides to change their order.
• It is useful for organizing large presentations.

Last verified on 28-07-2026