Computer Science

A modem is a device that modulates and demodulates signals for data transmission over telephone lines, enabling computers to connect to the internet or other networks via phone lines.

A device that connects to a network without using physical cables is called a wireless device. It uses technologies like Wi-Fi, Bluetooth, or radio signals to communicate over a network.

A fault in a computer program that prevents it from working correctly is called a 'bug.' This is a standard term in computer science for an error or flaw in software.

By default, most word processing software, such as Microsoft Word, prints documents in Portrait mode, which is the standard vertical orientation.

A programmable machine is any device that can be instructed to perform different tasks through a set of instructions or programs. Computers are the most common example, but the definition is broader and includes any machine that can be programmed to perform multiple functions.

Passwords are coded entries that users input to gain access to a computer system. They are the most common method for authenticating users and protecting system security.

An antivirus program scans the device to detect (identify) and remove (eliminate) computer viruses. Option C accurately describes all the main functions of an antivirus program.

COBOL stands for 'Common Business Oriented Language.' It is a high-level programming language developed in the 1950s for business data processing applications.

A bit stands for 'Binary Digit,' which is the smallest unit of data in computing. It can have only two values: 0 or 1, representing off or on states in digital systems.

By default, most word processors like Microsoft Word print documents with 1 inch top and bottom margins, 1.25 inch left and right margins, and in portrait orientation. Therefore, all the options listed are correct.

Changing the appearance of a document, such as adjusting fonts, colors, and layout, is called formatting. Proofing refers to checking for errors, and editing involves modifying content, not appearance.

BIOS stands for 'Basic Input Output System.' It is firmware used to perform hardware initialization during the booting process on computers.

Borders can be applied to cells, text, and paragraphs in most word processing and spreadsheet applications. Therefore, 'All of the above' is the correct answer.

BMP stands for 'Bit Map,' which refers to a mapping of bits that represent images or data. It is commonly used in computer graphics to describe bitmap image files.

Analog computers operate using continuous electrical signals, which can represent a range of values. This is in contrast to digital computers, which use discrete electrical pulses.

API stands for Application Programming Interface, which is a set of protocols and tools for building software applications. The other options do not represent the correct expansion of the acronym API.

Angular is a framework for JavaScript, primarily used for building web applications. It is developed and maintained by Google and is based on TypeScript, which is a superset of JavaScript.

The arrangement of keys on a standard keyboard is called the QWERTY arrangement, named after the first six letters in the top letter row of the keyboard.

Android Inc. was founded in 2003 by Andy Rubin, Rich Miner, Nick Sears, and Chris White before being acquired by Google in 2005.

ANSI stands for American National Standards Institute, which is a private non-profit organization that oversees the development of voluntary consensus standards in the United States.

BASIC stands for 'Beginner's All-purpose Symbolic Instruction Code.' Option B is the only one that correctly spells out the acronym and matches the widely accepted definition.

The arrangement of computers in a network is called topology. Topology refers to the physical or logical layout of network devices and cables.

ARP stands for Address Resolution Protocol, which is used to map IP addresses to MAC addresses in a local network. The other options do not represent the correct expansion of ARP.

The Arithmetic Logic Unit (ALU) is the component of the CPU responsible for performing arithmetic and logical operations in a computer.

An email address is typically composed of a user name, the '@' symbol, and a domain name (e.g., username@example.com). Therefore, the correct answer is 'User Name and Domain Name.'