Explanation

• An input device is any hardware component used to send data, signals, and commands to a computer. 
• Keyboard: Used to type text and enter commands.
• Mouse: Used to control the cursor and select items.
• Microphone: Used to record sound.
• Scanner: Used to convert physical documents into digital file
  

Last updated by NA on 09-09-2026

Explanation

• ROM stands for Read Only Memory.
• It is a type of non-volatile memory.
• So its contents are retained when power is turned off.
• ROM stores important instructions such as firmware and boot instructions.

Additional information:

• RAM → Random Access Memory
• PROM → Programmable Read Only Memory
• EPROM → Erasable Programmable Read Only Memory

Last verified on 08-08-2026

Explanation

• Raw data processed by a computer becomes Information.
• Data consists of raw, unorganized facts and figures.
• After processing, data becomes meaningful and useful information.
• Information helps users make decisions.

Last verified on 13-07-2026

Explanation

• .pptx is the standard file format for saving a Microsoft PowerPoint presentation.
• It is the default presentation format in modern versions of PowerPoint.
• The X in .pptx indicates the XML-based Office Open XML format.

Last verified on 24-08-2026

Explanation

• In MS Excel, double-clicking a chart object opens the chart for editing.
• You can then modify its data, design, layout, titles, and formatting.
• A single click generally selects the chart.
• Clicking and dragging is mainly used to move the chart.

Last verified on 24-08-2026

Explanation

• Alt + Tab is used to switch between open applications or windows.
• Hold Alt and press Tab to move through currently open windows.
• It is a useful shortcut for multitasking.

Additional information:

• Alt + F4 — Close the active window
• Windows + Tab — Open Task View
• Ctrl + Tab — Switch between tabs
• Windows + D — Show/Hide desktop

Last verified on 24-08-2026

Explanation

• The CPU (Central Processing Unit) is the brain/heart of the computer.
• It processes data and executes instructions.
• It controls other parts of the system.

Additional information:

• First commercial CPU: Intel 4004 (1971)
• Invented by: Italian physicist Federico Faggin
• CPU Examples: Clock speeds – 3.0 GHz, 3.5 GHz, 4.0 GHz, 4.5 GHz, 5.0 GHz

Last updated by NA on 09-09-2026

Explanation

• Machine Language is the lowest-level computer language, written entirely in binary code (0s and 1s).
• It is directly understood by the computer’s CPU without any translation.
• All higher-level languages (like C, Pascal, Basic) are converted into machine language before execution.

Last verified on 12-03-2026

Explanation

• Ctrl + V pastes copied or cut content from the Clipboard.

Additional information:

• Ctrl + C copies selected content to the Clipboard.
• Ctrl + X cuts selected content and places it on the Clipboard.
• Ctrl + A selects all content in the document.
• Ctrl + B applies bold formatting to selected text.

Last verified on 10-08-2026

Explanation