Explanation

Explanation

• LED (Light Emitting Diode) is a semiconductor device that emits light when electric current passes through it.
• It is widely used in lighting, displays, electronic indicators, and screens.

Additional information:

• Energy efficiency: Up to 90% more efficient than traditional bulbs
  First discovery: H. J. Round – 1907
  Early research: Oleg Losev – 1927
  Practical LED development: James R. Biard – 1961
  First commercial production: October 1962 (Nick Holonyak)

Last verified on 12-03-2026

Explanation

• In presentation software (like MS PowerPoint), special effects used to introduce slides are called Transitions.
• Transitions control how one slide moves to the next during a presentation.
• They can be simple fades, wipes, pushes, or dynamic animations to make the presentation more engaging.

Last verified on 11-03-2026

Explanation

• In MS Excel, to sum values in a range based on a condition, the SUMIF() function is used.
• It allows you to add only the numbers that meet a specific criterion, such as all sales above 1000 or only a certain category.
• This is different from SUM(), which adds all numbers in a range without any condition.

Last verified on 11-03-2026

Explanation

• In MS Excel, a pre-programmed formula is called a Function.
• Functions perform specific calculations or tasks automatically, such as SUM, AVERAGE, or IF.
• They save time by automating repetitive formulas and reducing errors.

Last verified on 11-03-2026

Explanation

• In MS Excel, different functions are used to handle dates and times.
• To display the current date and time, the NOW() function is used.

Additional information:

• DATE() – Returns a date based on year, month, and day
• TODAY() – Returns today’s date only
• TIME() – Constructs a specific time from hours, minutes, and seconds

Last verified on 11-03-2026

Explanation

• In MS Excel 2016, the UPPER() function is used to convert text to uppercase letters.
• It changes all lowercase characters in a cell to capital letters.

Additional information:

• LOWER() – Converts text to lowercase
• PROPER() – Capitalizes the first letter of each word

Last verified on 11-03-2026

Explanation

A webpage address is called a URL,

URL: Uniform Resource Locator.

URL consists of five parts:

1. Scheme
2. Subdomain
3. Top-level domain
4. Second-level domain
5. Subdirectory

Last updated 18-02-2026

Explanation

• Microcomputers are small computers designed for personal or business use.

• They are built around a central processing unit (CPU or processor), which executes instructions and controls the system.
• Processors are the brain of microcomputers, enabling them to perform calculations, run software, and manage hardware.

Last verified on 11-03-2026

Explanation

• Web Browser is a software application used to access and view websites on the Internet.
• Examples include Google Chrome, Safari, Internet Explorer, and Firefox.
• Microsoft Office is an office suite, and NetBeans is an IDE (Integrated Development Environment), not browsers.

Last verified on 10-03-2026