Computer Science

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Digital computers operate using the binary system because they process data in two states, typically represented as 0 and 1, which correspond to off and on electrical signals. This makes the binary system the fundamental number system for digital computing.

Software in computer technology refers to a collection of programs that instruct the computer to perform specific tasks. Physical equipment is hardware, graphical representation is unrelated, and 'None of these' is incorrect.

The Internet serves multiple functions including enabling email communication, advertising commercial products, and connecting computers worldwide. Therefore, all the options listed are correct functions of the Internet.

FTP stands for File Transfer Protocol, which is a standard network protocol used to transfer files between a client and server on a computer network.

The third generation of computers (1964-1971) primarily used integrated circuits and included minicomputers. Mainframe computers belong to earlier generations, and desktop computers became common later. Therefore, only 'Mini Computer' correctly represents third-generation computers.

ROM stands for Read Only Memory, which is a type of non-volatile memory used in computers to store firmware or permanent data.

The first generation of computers primarily used vacuum tubes and valves as their main electronic components. Integrated circuits and transistors were introduced in later generations, making option A the correct choice.

Option A, 'Name@website.com', follows the correct email format with a username, '@' symbol, and a valid domain. Options B and C are invalid formats: B contains two '@' symbols, and C lacks the '@' symbol entirely.

LCD stands for Liquid Crystal Display, which is a flat-panel display technology commonly used in monitors, televisions, and other screens. The other options are incorrect expansions of the acronym.

Floppy disk drives, hard disk drives, and optical disk drives can both read data (input) and write data (output), making them both input and output devices. Teleprinters also function as both input and output devices, as they can send and receive data. Therefore, the correct answer is 'Both A and B'.

Microsoft released the first version of Windows, Windows 1.0, in 1985. Therefore, option A is correct.

A bit is the smallest unit of data in computing and represents a binary value of either 0 or 1. It is not equal to any decimal number like 0.125, 0.150, or 0.12, so the correct answer is 'None of these'.

Ctrl + Z is the standard keyboard shortcut used to undo the last action in most software applications, making option B the correct answer.

Among the options given, GB (Gigabyte) is the largest unit of memory. KB (Kilobyte) is smaller than MB (Megabyte), and MB is smaller than GB. Larger units such as Terabyte (TB) and beyond exist, but since they are not listed in the options, the largest unit among the given choices is GB.

IC stands for Integrated Circuit, which is a set of electronic circuits on a small chip of semiconductor material, commonly used in electronic devices.

The Internet is commonly referred to both as "The network of networks" because it connects multiple networks worldwide, and informally as "The net." Therefore, option C, "Both," is correct.

Twitter was launched in March 2006, making option A the correct answer. This is a well-documented fact in the history of social media platforms.

The HTML tag used to underline text is the <u> tag. This tag encloses the text you want to underline, for example: <u>underlined text</u>. While the <u> tag was deprecated in HTML 4, it was reintroduced in HTML5 with a semantic meaning related to non-textual annotations. However, it still renders text with an underline by default in all modern browsers. The <underline> tag is not a valid HTML tag, and option B is invalid. Therefore, the correct answer is C.