Computer Science Test 2 Nddc Scholarship

Television, newspapers, and telephones are all established mediums for the transmission and reception of data and information. Since all the options listed are valid methods of communication, 'None of these' is the correct answer to identify which one is NOT a way of receiving information.

The system unit (the computer case) houses the core internal components. This typically includes disk drives for storage, the system board (motherboard) which connects all parts, adapter cards for expanded functionality like graphics or networking, and the power supply unit which converts electricity for the internal components to use.

Microsoft Word supports several specific types of tab stops to align text, including Left, Center, Right, Decimal (for numbers), and Bar tabs. While 'Flush' describes a type of text alignment (like Flush Left or Flush Right), it is not a specific category of tab stop found in Word's formatting menu.

Compression software uses mathematical algorithms to remove redundancies or re-encode data more efficiently, resulting in a smaller file size (such as .zip or .rar files). This is vital for saving disk space and reducing the time required to send large amounts of data over the internet or other networks.

The Central Processing Unit (CPU) is often referred to as the 'brain' of the computer. Its primary function is to fetch, decode, and execute instructions from software programs. It processes all the raw data input by the user to produce the desired output, making it the most critical hardware component.

Memory-mapped I/O (MMIO) is a method where the CPU uses the same address bus to access both the main memory (RAM) and the input/output devices. This allows the processor to communicate with peripherals using the same standard instructions it uses for memory, simplifying the hardware design and communication protocols.

DOS (Disk Operating System), particularly MS-DOS, was the dominant operating system for microcomputers throughout the 1980s. Before the widespread adoption of graphical interfaces like Windows or Mac OS, DOS provided the essential command-line environment that allowed early personal computers to manage files and execute software applications effectively.

A scanner is an input device because its primary function is to capture physical images or documents and convert them into digital data for the computer to use. In contrast, monitors, fax machines (when receiving), and printers are output devices that present computer-generated information to the user in physical or visual forms.

The Motion Picture Experts Group (MPEG) is an alliance of working groups that sets standards for the digital compression of audio and video. These standards allow for the efficient storage and transmission of high-quality visual information by reducing the file size into a more economical form without a significant loss in perceived quality.

A concept keyboard is a specialized input device where each key represents a specific item or action rather than a letter of the alphabet. In fast food outlets, these are used so that staff can press a single button representing a 'Burger' or 'Fries,' which speeds up the ordering process and reduces the chance of manual entry errors.