Explanation

• DOS (Disk Operating System) is a single-user operating system.
• It is designed for one user at a time.
• DOS uses a Command-Line Interface (CLI) instead of a graphical interface.

Additional information:

• Examples of Multi-user OS: Windows, Linux, UNIX, macOS

Last verified on 06-08-2026

Explanation

• Shortcut key for center alignment: Ctrl+E

Additional information:

• Center align means middle of the page.
• Ctrl + R -- Align selected text or line to the right.
• Ctrl + M -- Indent the paragraph.

Last verified on 07-08-2026

Explanation

• BIOS stands for Basic Input Output System.

Additional information:

• BIOS is a firmware stored on a computer’s motherboard.
• Initializes hardware during booting and provides runtime services.
• Acts as an interface between operating system and hardware.

Last verified on 04-02-2026

Explanation

• Decrease the font size by 1 point: Ctrl + [

Additional information:

• Increase the font size. Ctrl + Shift + >
• Decrease the font size: Ctrl + Shift + <
• Increase the font size by 1 point: Ctrl + ]
• Ctrl + Shift + F: Change the font
• Open the Font dialog box to change the font: Ctrl + Shift + F

Verified & Updated

Explanation

• The keyboard shortcut to select the entire document (or all items in a window) is Ctrl + A.
• Function: Selects all content, text, or files in the active window.

Additional information:

• Ctrl + R = used for aligning selected text to the right.
• Ctrl + E = used for aligning selected text to the center.
• Ctrl + J = use for Justify paragraph alignment.
• Ctrl + L = used for aligning selected text to the left.
• Ctrl + Q = used to Align the selected paragraph to the left.

Explanation

• The keyboard shortcut to open an existing file in Microsoft Word is Ctrl+O.
• You can also open a document in Word by double-clicking its icon in Windows. 

Additional information: 

• Ctrl+N: Opens a new or blank document
• Ctrl+S: Saves the document
• Ctrl+W: Closes the document
• Ctrl+A: Selects all contents of the page
• Ctrl+B: Bolds highlighted selection
• Ctrl+C: Copies selected text
• Ctrl+X: Cuts selected text
• Ctrl+P: Opens the print window

Last verified on 02-04-2026

Explanation

• The shortcut key to insert a new slide in a PowerPoint presentation is Ctrl + M.

Additional information:

• Ctrl + N shortcut key used to create a new presentation document.
• Ctrl + S shortcut key used to save a presentation.

Last verified on 29-05-2026

Explanation

Explanation

• Type: Impact Printer
• Printing Method: Pins strike an ink ribbon
• Common Pin Configurations: 9-pin, 24-pin
• Output: Text and graphics
• Main Advantage: Can print multi-part forms

Last verified on 07-08-2026

Explanation

• The phrase "Out of the blue" means Unexpectedly/Suddenly.
• It refers to something happening without warning or surprise, like a sudden event or occurrence.

Last verified on 06-08-2026