Explanation

CPU speed is primarily measured in Hertz (Hz), and Gigahertz (GHz) for modern processors

The fundamental unit is Hertz (Hz), where 1 Hz = 1 cycle per second.

Modern Units: Most, if not all, modern processors use Gigahertz (GHz), where  1 GHz = 10^9 Hz (one billion cycles per second).

Context: It is often referred to as the "clock speed" or "clock rate" of the CPU.

Mbps measures internet speed.

Mbytes measure data size.

Last updated 15-feb-2026

Explanation

GUI stands for graphical user interface

Origin: First developed at Xerox PARC in the early 1980s.

It is a type of user interface that interacts with electronic devices.

Examples: Microsoft Windows, Apple macOS, and mobile operating systems. 

Last updated 15-feb-2026

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Explanation

ASCII stand for American Standard Code for Information Interchange.

It is a character encoding standard that assigns numerical values (0-127) to English letters, numbers, punctuation marks

Work on the ASCII standard began in May 1961

Definitive version published in 1968

Last updated 15-feb-2026

Explanation

Linux is the most prominent example of an open-source operating system. 

Linux: Created by Linus Torvalds in 1991,

It is a Unix-like operating system that relies on a community-driven development model.

Last updated 15-feb-2026

Explanation

• Cache memory acts as a buffer between the CPU (Central Processing Unit) and the main memory (RAM).
• It is a small, high-speed memory that stores frequently used data and instructions that the CPU is likely to need next.
• This allows the CPU to access the data and instructions it needs quickly, without having to wait for the slower main memory to respond.

Last verified on 10-02-2026

Explanation

• Microsoft Excel is Microsoft's spreadsheet program that can be used to organize, format, and calculate data.
• Microsoft Excel is a spreadsheet application used for calculations, charts, and data analysis

Last verified on 10-02-2026

Explanation

1 Kilobyte (KB) = 1024 bytes

One Megabyte (MB) = 1024 Kilobytes (KB

One Gigabyte (GB) =  1024 Megabytes MB

One Terabyte (TB)= 1024 gigabytes (GB).

The size of information in the computer is measured in:

Kilobytes (KB)

Megabytes (MB)

Gigabytes (GB)

Terabytes (TB)

Last verified on 08-02-2026

Explanation

• SDLC stands for Software Development Life Cycle.
• SDLC is a structured process for developing software efficiently.
• It defines stages from planning to maintenance.
• Ensures software is high-quality, cost-effective, and meets requirements.
• Common phases: Requirement Analysis → Design → Implementation → Testing → Deployment → Maintenance.

Last verified on 07-02-2026

Explanation

• NIC stands for Network Interface Card.
  • It connects a computer to a network or internet.
  • It can be wired (Ethernet) or wireless (Wi-Fi).
  • Every NIC has a unique MAC address.
  • It enables data communication between devices.

Last verified on 07-02-2026

Explanation

WWW stands for World Wide Web

Additional information related to WWW

• It is an information system.
• Creator: Conceived by Tim Berners-Lee in 1989.
• Year started: 1989
• First published: 6 August 1991
• Founder: Tim Berners-Lee in 1989.
• Birthplace: CERN near Geneva, Switzerland.