Explanation

• LAN is ideal for connecting computers in closely located buildings, such as within a campus or office block.
• LAN stands for Local Area Network.
• It offers high speed and cost-effective connectivity over short distances.

Last verified on 19-04-2026

Explanation

• A Modem (Modulator-Demodulator) converts digital signals into analog signals and vice versa.
• It is used to connect computers to the internet via telephone lines or other networks.

Additional information:

• Switch – connects multiple devices in a network
• Hub – basic network connector
• Repeater – boosts signal strength
• Router – directs internet traffic

Last verified on 19-04-2026

Explanation

An email address consists of two parts: 

1. Username or ID (the name or ID chosen by the user)
2. Domain name (the name of the organization or service provider).

Format: Username@Domainname.com

Example: john.doe@example.com

Additional information:

• Email, short for Electronic Mail, has its roots in the early 1960s.
• The first email was sent in 1971 by Ray Tomlinson.
• He also introduced the "@" symbol to separate the username from the hostname.

Last verified on 19-04-2026

Explanation

• DOS stands for Disk Operating System.
• It is an early type of computer operating system used to manage files and programs.
• It works through text-based commands (command line).
• A famous example is MS-DOS used in early PCs. 
• Dennis Ritchie is the father of MS-DOS.
• It was developed in 1982.

Last verified on 19-04-2026

Explanation

• PNG, JPEG, and GIF are image file formats used to store pictures.
• They are widely used in websites, graphics, and digital media.
• Each format has different compression and quality features.
• JPEG is best for photos.
• PNG for high-quality images.
• GIF for animations.

Last verified on 19-04-2026

Explanation

• OTP stands for One Time Password.
• It used in banking security systems.
• It is a temporary code sent to the user’s mobile/email.
• Introduced widely in digital banking for secure transactions.
• It is valid for only one login or transaction.
• Helps prevent unauthorized access and fraud.

Last verified on 19-04-2026

Explanation

To find the decimal equivalent of the binary number 1011:

(1 × 2³) + (0 × 2²) + (1 × 2¹) + (1 × 2⁰)

= (1 × 8) + (0 × 4) + (1 × 2) + (1 × 1)

= 8 + 0 + 2 + 1

= 11

Last verified on 12-04-2026

Explanation

• In HTML, frames are used to divide a web page into multiple sections.
• Each section (frame) can display a different HTML document.
• This allows multiple pages to be shown in one browser window.
• Frames help in organizing content like menus, headers, and main pages separately.

Last verified on 12-04-2026

Explanation

• A special-purpose computer is designed to perform a specific task only.
• Wheel alignment machines are built for measuring and adjusting vehicle wheels.
• These computers are not used for general tasks like typing or browsing.
• They are optimized for accuracy and efficiency in a single function.
• Common in industries like automobiles, medical, and manufacturing.

Last verified on 12-04-2026

Explanation

• Microwave Communication uses high-frequency radio waves.
• It requires line-of-sight (direct alignment) between sender and receiver.
• Used for long-distance communication like towers and satellites.
• Signals cannot bend much around obstacles.

Last verified on 12-04-2026