Computer Science

One nibble is equal to 4 bits, so 4 nibbles equal 16 bits. Since 1 byte is 8 bits, 16 bits is equal to 2 bytes.

A CPU (Central Processing Unit) is a physical component of a computer system, making it hardware, not software or a program. It is responsible for executing instructions and processing data.

The abacus is considered the first mechanical calculator, used for performing arithmetic calculations long before the invention of electronic or mechanical computers.

BCC stands for 'Blind Carbon Copy,' which is a feature in email systems that allows the sender to hide the recipient entered in the BCC field from the other recipients.

CSS stands for Cascading Style Sheets, which is a language used to describe the style of document presentations in web development. The other options are incorrect.

The 'Brain' computer virus, known as the first computer virus for MS-DOS, was created by two brothers from Pakistan, Basit and Amjad Farooq Alvi, in 1986.

First generation computers used vacuum tubes and valves as their main electronic component for processing and memory. Transistors and integrated circuits were introduced in later generations.

IMEI stands for International Mobile Equipment Identity, which is a unique number assigned to every mobile device for identification purposes.

IBM introduced the IBM Personal Computer (IBM PC) in 1981, which became widely recognized as the first computer designed for home and personal use. While Apple and others had earlier models, the IBM PC set the standard for home computing.

MS Word is a word processing software developed by Microsoft, used for creating, editing, and formatting text documents. It is not a spreadsheet or an operating system.