Explanation

• ROM is commonly used to store firmware in embedded systems.
• Firmware is permanent software stored in non-volatile memory.
• ROM retains data even when power is OFF.
• It is essential for device startup and basic control functions.

Last verified on 24-06-2026

Explanation

• Presentation layer is responsible for encryption and decryption in the OSI model.
• It ensures data is converted into a secure and usable format.
• It handles data translation, compression, and encryption.

Last verified on 08-06-2026

Explanation

Explanation

• Purpose: Prevents text from being hidden in the binding
• Location: Can be added to left or top depending on binding type
• Adjustable in: Layout > Margins > Custom Margins > Gutter

Explanation

• Cloud storage is an internet-based service for storing data remotely.
• Users can save files on online servers instead of local devices.
• It allows access to data from anywhere with internet connection.
• It is widely used for backup and file sharing.

Last verified on 29-05-2026

Explanation

• E-commerce, also known as electronic commerce or internet commerce.
• It is refers to the buying and selling of goods or services using the internet.

Last verified on 20-04-2026

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 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

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

• In MS Word 2016, page margins define the space between the text and the edge of the page.
• Common margin types are: Top, Bottom, Left, Right.
• “Center” is not a page margin type.

Last verified on 10-03-2026