Computer Science

4G mobile technology is designed to support high-speed data transmission for both voice calls and non-voice (data) services. This enables advanced features like full-motion video, high-speed internet, and video conferencing seamlessly.

Google was founded in 1998 by Larry Page and Sergey Brin at Stanford University in California, USA. It is headquartered in Mountain View, California, and operates as an American multinational technology company under Alphabet Inc.

In Microsoft Word, Headers and Footers are inserted through the Insert menu/tab. This option allows users to add page numbers, dates, titles, and other repeating content at the top or bottom of pages.

F1 through F12 keys on a keyboard are known as Function keys. They perform specific tasks depending on the software or operating system, such as F1 for Help, F2 for renaming files, etc.

Analog to analog conversion involves modulating an analog signal (such as voice or music) onto another analog carrier signal. Radio broadcasting (AM/FM) is a classic example where audio signals are modulated for transmission over airwaves.

FDD stands for Floppy Disk Drive. It was a common data storage device used in early personal computers to read and write data on removable floppy disks (5.25" or 3.5").

Output devices are hardware components that receive data from the computer and present it to the user. Common examples include the monitor/screen (displays visuals), printer (produces hard copies), and speakers (output sound).

Non-numeric (qualitative) data consists of text or descriptive information that cannot be used in mathematical calculations. Employee address is non-numeric, whereas examination score and bank balance are numeric (quantitative) data.

Fifth generation computers (present and future) are based on Artificial Intelligence (AI). They aim to develop machines that can understand natural language, have learning capabilities, and use parallel processing with superconductors and ultra-large-scale integration (ULSI).

Dennis Ritchie developed the C programming language at Bell Laboratories in the early 1970s. He is widely regarded as the 'Father of C' and also co-created the Unix operating system.

The Operating System manages all file-related operations such as creating, deleting, organizing, reading, and writing files on storage devices. It provides a file system that acts as an interface between the user and the physical storage hardware.

Lotus 1-2-3 spreadsheet files use several extensions depending on the version, including .WKS, .WK1, .WK2, .WK3, .WK4, and .123. Among the given options, .123 is a valid extension associated with Lotus 1-2-3 files.

FAT stands for File Allocation Table. It is a simple file system originally designed for floppy disks and later used in MS-DOS and early Windows versions to keep track of file storage locations on a disk.

FM stands for Frequency Modulation, a method of encoding information in a carrier wave by varying its frequency. It is commonly used in radio broadcasting because it provides better sound quality and less noise interference than AM.

A digitizer is an input device that converts analog information, such as drawings or handwriting, into digital data that a computer can process. It is commonly used in graphic tablets and touchscreens.

Distributed data entry refers to the process where data is entered at multiple locations where it originates, rather than being centralized. This approach improves efficiency and accuracy by allowing data to be captured at the source.

Disk drives and tape drives are used to store data permanently or for long periods of time. Therefore, they are classified as secondary storage devices in a computer system.

E-mail stands for 'Electronic mail,' which is the correct and widely accepted meaning. The other options are incorrect or not commonly used.

A dot-matrix is a type of printer that creates characters and images by striking pins against an ink ribbon. It is commonly used for printing multi-part forms and continuous paper.

DOS stands for Disk Operating System. It is an operating system that manages files, memory, and hardware devices through command-line instructions.

DSL stands for Digital Subscriber Line. It is a technology used to provide high-speed internet access over traditional telephone lines while allowing voice calls and data transmission simultaneously.

DVI stands for Digital Video Interface. It is a video display interface used to connect a computer to a monitor or display device for transmitting digital video signals.

DVD stands for 'Digital Versatile Disk.' It is a type of optical storage media used for storing data, video, and audio. The term 'Digital Versatile Disk' is the official full form recognized internationally.

DMA stands for Direct Memory Access. It is a feature that allows hardware devices to transfer data directly to or from memory without continuous involvement of the CPU, improving system performance.

EBCDIC stands for 'Extended Binary Coded Decimal Interchange Code,' which is a character encoding system developed by IBM. Option A is the only correct expansion of the acronym.