Explanation

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

• A computer application program that displays data arranged in rows and columns is called a Spreadsheet.
• Spreadsheets organize data in cells formed by the intersection of rows and columns.
• They are used for calculations, data analysis, charts, and record keeping.
• Examples include Microsoft Excel, Google Sheets, and LibreOffice Calc.
• A spreadsheet file usually contains multiple worksheets.

Last verified on 07-08-2026

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

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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

• Binary digits need more space because binary codes are long and require many digits to represent information.
• Computers use only two digits: 0 and 1 to store and process data.
• A large amount of binary digits (bits) may be required to represent text, numbers, images, and other information.
• 8 bits = 1 byte, which is a common unit of digital storage.
• Binary is used because electronic devices can easily represent two states: ON (1) and OFF (0).

Last verified on 07-08-2026

Explanation

Explanation

• Embedded computer software is designed to control a specific hardware device.
• It is stored inside electronic devices and performs dedicated functions.
• Embedded software works with hardware such as washing machines, cars, cameras, and medical devices.
• It is usually designed for specific tasks.
• Examples include firmware in routers, printers, and smart appliances.

Last verified on 07-08-2026