Explanation

• Inventor: Tim Berners-Lee
• Collaborator: Robert Cailliau
• Year of invention: 1989 August
• Organization: CERN (European physics lab, Switzerland)
• First website: 1991 (public release)
• WWWW stands for World-Wide Web Worm.

Last verified on 24-06-2026

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

• YouTube is the most common platform for video streaming worldwide.
• It allows users to watch, upload, and live stream videos.
• It is widely used for education, entertainment, and news content.
• It was launched in 2005.

Last verified on 24-06-2026

Explanation

• Switch is a networking device used to connect multiple computers in a network.
• It forwards data only to the intended device using MAC addresses.
• It improves network efficiency and reduces data traffic.
• It is commonly used in LAN (Local Area Network).
• It is works on Data Link Layer (OSI Model Layer 2).

Last verified on 24-06-2026

Explanation

• ROM (Read Only Memory) is a non-volatile storage device.
• It stores data permanently even without power.

Additional information:

• RAM (Random Access Memory) is a volatile storage device.
• It loses data when power is off.

Last verified on 17-06-2026

Explanation

• Ada Lovelace is considered the world’s first programmer.
• Because she wrote the first algorithm for a machine.
• She worked on Charles Babbage’s Analytical Engine in the 1840s.
• Her work is recognized as the first concept of computer programming.

Last verified on 23-06-2026

Explanation

• DROP TABLE command is used in SQL to permanently remove a table from the database.
• It deletes the table structure along with all its data.
• Unlike DELETE, it removes the entire table, not just records.

Last verified on 23-06-2026

Explanation

• Solid-State Drive (SSD) has no moving or rotating parts, making it highly shock-resistant.
• It uses flash memory chips to store data electronically.
• SSDs are much faster and more durable than traditional hard drives.

Last verified on 23-06-2026

Explanation

• Full form: Hyper Text Transfer Protocol Secure
• Security layer: SSL/TLS encryption
• Purpose: Secure data transfer on the internet
• Default port: 443
• Used in: Banking, e-commerce, login systems

Last verified on 23-06-2026

Explanation

• Regression Testing checks that new changes do not break or damage existing code.
• It ensures previous features, design, and functionality remain stable.
• It is mainly used after updates or bug fixes.

Last verified 23-06-2026