Computer Fundamentals and System Concepts

A computer programmer does the logical thinking and problem-solving for computers by writing instructions. Entering input data quickly is data entry, operating equipment is technical support, drawing flowcharts is just one part of programming, and programmers are very useful.

Booting is the process of loading and initializing the operating system when a computer is powered on. Without an operating system, the computer cannot start up properly or run any programs.

The ALU (Arithmetic Logic Unit) is the component within the CPU that performs mathematical calculations and logical operations. While the CPU contains the ALU, the ALU is specifically responsible for arithmetic computations.

Downloading refers to receiving data from a remote server, typically from the internet, to your local computer. Uploading is the opposite (sending data), while gathering and inputting are generic terms not specific to internet data transfer.

The machine cycle (or instruction cycle) consists of the fetch phase (retrieving the instruction) followed by the execution phase (performing the instruction). This cycle repeats continuously as the computer processes programs.

The motherboard is also called the System Board because it contains the primary circuitry and connects all components. 'Computer Board', 'Central Board', and 'Mouse' are not standard alternate names.

IC stands for Integrated Circuit, the fundamental building block of modern electronics. Options A, B, and D are incorrect expansions.

Statement (3) is correct about computer virus. 

Supercomputers are the largest and most powerful computers designed for complex calculations. Mainframes are large-scale servers for enterprise applications. Minicomputers are mid-range systems smaller than mainframes. Microcomputers (personal computers) are the smallest. This hierarchy reflects both physical size and computational capacity, from largest to smallest.

Computers perform all four basic mathematical operations. While addition is the fundamental operation at the hardware level (subtraction via 2's complement, multiplication via repeated addition, division via repeated subtraction), all operations are implemented at the instruction set level.

Multimedia programs integrate multiple forms of media and content: text for information, graphics for visual elements, sound for audio, animation and movies for video content. The combination of these different media types creates rich, interactive experiences that engage multiple senses. Modern multimedia applications span education, entertainment, advertising, and communication.

Storage and retrieval operation is correct because saving a program for later use involves storing it on disk and retrieving it when needed. Hard copy refers to paper output, while comparison and arithmetic operations are CPU functions, not storage operations.

A program is a sequence of instructions that tells a computer how to solve a problem. Soft copy is screen output, the control unit directs operations, and the CPU executes instructions but is not the instructions themselves.

Supercomputers use parallel processing with hundreds of microprocessors working together to achieve extreme processing power. They are more expensive than mainframes, faster than mainframes, and have limited expensive software due to their specialized nature.

Selection is correct because you must first highlight or select the text/segment before copying it. Deleting removes content, printing outputs to paper, and cutting removes content from original location.