Explanation

• CPU stands for Central Processing Unit.
• It is the main part of a computer that processes all instructions.
• It is considered the brain of the computer system.
• It performs all calculations and decision-making tasks.
• It controls the operations of all hardware and software.
• It is located on the motherboard.

Last verified on 10-06-2026

Explanation

• RAM and Cache are volatile memories.
• It means their data is lost when power is turned off.
• Volatile memory requires continuous power to retain data.
• RAM is used for running programs and storing temporary data.
• Cache is a high-speed memory that stores frequently used data for the CPU.

Additional information:

• ROM is non-volatile and retains data without power.

Last verified on 16-02-2026

Explanation

• ROM (Read Only Memory) is a non-volatile storage device.
• It stores data permanently even without power.

Additional information:

• RAM (Random Access Memory) is a volatile storage device.
• It loses data when power is off.

Last verified on 17-06-2026

Explanation

• In MS Word, Header and Footer options are found in the Insert tab.
• Headers appear at the top of the page, while footers appear at the bottom.
• They are used for page numbers, dates, titles, and document information.
• This feature helps in professional document formatting.

Last verified on 29-05-2026

Explanation

• Ctrl + C in MS Word is used for the Copy command.

Additional information:

• Ctrl + R → Align text to the right
• Ctrl + E → Center align text
• Ctrl + J → Justify paragraph
• Ctrl + L → Align text to the left
• Ctrl + Q → Remove paragraph formatting (reset to default left alignment)

Last verified on 10-06-2026

Explanation

• Ctrl + B is used in MS Word to make the selected text bold (thick and dark).

Additional information:

• MS word short key for help: F1
• Ctrl + A = Select all
• Ctrl + B = Bold
• Ctrl + I = Italic
• Ctrl + J = Justify
• Ctrl + P = Print
  
• Ctrl + Y = Redo
• Ctrl + S = Save

Last verified on 10-06-2026

Explanation

• CTRL + H is the shortcut key used in most software (like MS Word, Excel) to open the Find and Replace dialog box.
• It allows users to search for a word or phrase and replace it with another.

Additional information:

• CTRL + F: Only opens the Find dialog
• CTRL + G: Opens the Go To dialog
• CTRL + R: Aligns text to the right in word processors

Last verified on 10-06-2026

Explanation

• The shortcut key for Undo (last action reverse) is Ctrl + Z in most computer systems.
• It is used to cancel the last mistake or action.

Additional information:

• Ctrl + P = Print
• Ctrl + Y = Redo
• Ctrl + S = Save
• Ctrl + C = Copy command
• Ctrl + V = Paste
• Ctrl + C = Copy
• Ctrl + X = Cut
• Ctrl + Y = Redo

Last verified on 10-06-2026

Explanation

• The CPU (Central Processing Unit) is the brain/heart of the computer.
• It performs all calculations, executes instructions, and controls other components.

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 verified on 15-02-2026

Explanation

• Clip Art is a graphic solution.
• It is used in word processors to insert ready-made images.
• It helps enhance the visual appearance of documents.
• Users can easily add pictures without creating them manually.
• It is a built-in library of images and symbols.

Last verified on 10-06-2026