Computer Fundamentals

A mouse (or a puck in the context of a digitizer tablet) is a hand-held pointing device that detects two-dimensional motion relative to a surface. This motion is translated into the motion of a pointer on a display.

Dynamic allocation refers to the process of assigning memory space to a program during its execution (runtime) rather than at compile time. This allows for more flexible and efficient use of system resources.

Since 1 byte is equal to 8 bits, a 32-bit word is calculated as 32 divided by 8, which equals 4 bytes. This is a standard measurement in computer architecture.

Electronic filing (misspelled as 'filling' in the options) refers to the digital storage and management of documents, allowing for easy organization and retrieval. It replaces traditional paper-based filing systems.

A digital computer is fundamentally composed of input devices, output devices, and the Central Processing Unit (CPU). The CPU itself contains the ALU and Control Unit, making it the primary third functional element.

In logic and computer science, a 'connective' (like AND, OR, NOT) is used to join simple propositions or statements to form more complex ones. These are fundamental to Boolean algebra and programming logic.

CHDL stands for Computer Hardware Description Language, which is used to model the behavior and structure of digital systems. Other options like ADA and APL are general-purpose programming languages, while LOGO is designed for educational use.

A logic gate is a fundamental building block of digital circuits that performs a logical operation on one or more binary inputs. It 'makes decisions' by producing a specific output (0 or 1) based on the logic of the gate (AND, OR, NOT, etc.).

A transaction file contains temporary data representing recent events or changes that are used to update a permanent master file. Sequential, random, and serial refer to file access methods rather than the purpose of the file in an update cycle.

RS-232 is a standard protocol for serial communication transmission of data between a computer and peripheral devices. MS-DOS, PC-DOS, and CP/M are operating systems, not data transmission standards.

PL/M (Programming Language for Microprocessors) was developed by Gary Kildall at Intel and was heavily influenced by and derived from the PL/1 language. It was designed specifically for systems programming on microprocessors.

Option 4 is the correct answer.

BSC (Binary Synchronous Communications) is a character-oriented link protocol developed by IBM in the 1960s for synchronous data transmission. It was widely used for communication between mainframes and remote terminals.

Protection refers to the mechanisms used to control access to data and prevent unauthorized copying or modification. While protocols govern communication, protection specifically addresses the security of the storage medium.

An illegal character is a bit pattern or code that is not recognized as a valid member of the character set being used (like ASCII or EBCDIC). Mnemonics are abbreviations for instructions, and Gray code is a binary numeral system.

Historically, IBM (International Business Machines) has been the most dominant and powerful computer manufacturer globally, especially during the mainframe and early PC eras. Intel and Microsoft are primarily component and software manufacturers, respectively.

An archive is a collection of historical records or data that is preserved for long-term storage and is not frequently accessed. Buffers and accumulators are temporary storage areas used during active processing.

Bar codes represent data by varying the widths and spacings of parallel lines. They are an optical machine-readable representation of data, often used to encode binary identification numbers.

Audio cassettes were designed for analog sound recording and lacked the precision and error-correction capabilities required for reliable high-speed digital data storage compared to dedicated computer tapes. While they were used in early home computers, they were far from ideal.

Charge-coupled devices (CCDs) are a type of semiconductor technology that can be used for memory storage, though they are now more common in imaging. Magnetic disks and ink characters are not semiconductor-based technologies.

Primary memory (RAM) is much faster than secondary memory (HDD/SSD) because it is directly connected to the CPU via the memory bus, allowing for rapid data access. However, it is also more expensive and smaller in capacity.

EMAS (Edinburgh Multi-Access System) was a pioneering operating system designed in the 1960s to support a large number of simultaneous interactive users on mainframe computers. MS-DOS and CP/M were primarily single-user systems.