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

• 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 + V is the shortcut key used to paste copied or cut text.

Additional information:

• Ctrl + C — Copy
• Ctrl + X — Cut
• Ctrl + Z — Undo
• Ctrl + A — Select All

Last verified on 23-08-2026

Explanation

• An antivirus software protects a computer against malware and viruses.
• It detects, blocks, and removes harmful software from a computer.
• Common threats include viruses, worms, Trojans, and spyware.
• Antivirus software helps protect files, programs, and system data.
• It can provide real-time protection against new threats.

Last verified on 12-08-2026

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

• 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

• The SUM function in MS Excel is used to add numbers from selected cells or ranges (e.g., =SUM(A1:A5)).
• It is one of the most commonly used functions for quick total calculations in spreadsheets.

Last verified on 26-05-2026

Explanation

• Amazon, Microsoft and Google are the three largest public cloud storage providers.
• Dropbox, eFolder, IBM etc. are examples of cloud service providers.

Last verified on 06-07-2026

Explanation

To calculate the average in Excel, you can use the AVERAGE function: 

• Formula =AVERAGE(number1, [number2], …) 
• Arguments: Number1 is required, and Number2 is optional 
• Example =AVERAGE(A1:A20) returns the average of the numbers in the range A1:A20

Last verified on 10-08-2026

Explanation

• A device driver is system software that enables the operating system to communicate with a specific hardware device.
• Examples include drivers for printers, keyboards, graphics cards, and network adapters.
• Without the correct driver, the operating system may not be able to use the hardware properly.
• Drivers act as a bridge between hardware and the operating system.

Last verified on 10-08-2026