Computer Fundamentals

Broadband networking uses a modulated carrier to transmit data signals over a medium, allowing for higher data rates compared to baseband networking.

A linkage editor, or linker, is a system program that combines independently compiled object modules into a single executable program. It resolves external references between the modules, ensuring that function calls and variable accesses across files are correctly mapped.

Data gathering involves collecting facts about the existing system through interviews, observations, and documentation reviews. Specialized forms, such as questionnaires or data flow worksheets, are frequently used to organize and standardize the information collected.

A transponder on a satellite acts as a repeater; it receives a signal from an earth station, amplifies it to compensate for signal loss, and then re-transmits it back to Earth at a different frequency to avoid interference.

GIGO stands for 'Garbage In, Garbage Out,' a fundamental concept in computing that emphasizes the importance of data integrity. It means that if the input data is incorrect or low-quality, the resulting output will inevitably be flawed, regardless of how well the program is written.

The Hypertape drive was a high-performance magnetic tape system introduced by IBM in the early 1960s for use with 7000-series mainframes. It achieved high data rates by using a wider tape and higher recording density than standard drives of that time.

A byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and it remains the basic addressable element in most computer architectures.

Microprocessors of the 1970s, such as the Intel 8080, typically featured an 8-bit data bus for processing data and a 16-bit address bus to access up to 64KB of memory. This architecture was the foundation for the first generation of personal computers.

Laser printers are the preferred choice for desktop publishing because they offer high resolution and the ability to print complex layouts containing both text and graphics. Other options like daisywheel printers are limited to fixed character sets and cannot print graphics.

The operator console is the interface used by system administrators to monitor and manage a computer system, especially mainframes. The control panel within the console provides physical or virtual indicators and switches to manage system power, boot sequences, and status.

A multi-user system is designed to support multiple users simultaneously by sharing the CPU's time and resources. This requires the operating system and hardware to handle multiple processing tasks concurrently through techniques like time-sharing.

A parity bit is a redundant bit added to a group of bits (usually a byte) to ensure the total number of set bits is either even or odd. It is a basic form of error detection used to identify single-bit corruption during data storage or transmission.

Page printers, such as high-speed laser printers, process and print an entire page at a time rather than character by character or line by line. This allows them to reach speeds of hundreds of pages per minute, sufficient to print a book very quickly.

A device driver is a specialized software component that allows the operating system to communicate with and control a specific hardware device. It manages the low-level timing and operational commands required for the hardware to function correctly within the system.

Disk storage units, such as hard drives, provide random access, allowing the system to jump directly to any data location. This is much faster than sequential access devices like magnetic tape, which require reading through all preceding data to reach a specific point.

IAS stands for Immediate Access Storage, a term used for the computer's primary memory (RAM) because the CPU can access it directly. Other options like CAI (Computer-Aided Instruction) or CCITT (a standards body) are unrelated to hardware memory.

In a distributed network, the host computer acts as the central server that manages resources, provides data, and controls the operations of connected terminals or smaller processors. It typically has more processing power and storage than the devices it serves.

File processing refers to the systematic manipulation of data files, including updating a master file with new transaction data. This ensures that the permanent records (master files) accurately reflect the current state of the business or system.

While modern personal computers use 64-bit microprocessors, the 16-bit architecture (like the Intel 8086) was the defining standard for the original IBM PC and its early successors. In the context of historical computing exams, 16-bit is the conventional answer.

The data transfer rate of a magnetic tape drive is determined by how many bits are recorded per inch (density) and how many inches of tape pass the read head per second (speed). Multiplying these two values gives the total amount of data transferred per second.

A buffer is a temporary storage area in memory that holds data while it is being transferred between two devices or processes with different speeds. It prevents the faster device (like a CPU) from having to wait for the slower device (like a printer) to finish.

ISDN (Integrated Services Digital Network) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network.

Minicomputers, which were popular in the 1970s and 80s, typically had processing speeds measured in Kilo Instructions Per Second (KIPS). A speed of 500 KIPS was representative of mid-range systems from that era, such as early PDP-11 models.