Computer Fundamentals and System Concepts

The Arithmetic Logic Unit (ALU) is the specific component of the CPU that performs all mathematical calculations and logical comparisons. The Control Unit, by contrast, directs the flow of data.

In computing, a system is described as being 'down' when it is unavailable or not functioning. This can be due to scheduled maintenance or an unexpected hardware/software failure.

A 'chip' or microchip is a small piece of semiconductor material, usually silicon, that houses an integrated circuit. These are the building blocks of modern electronic devices.

Memory (including both RAM and long-term storage) is the part of the computer system where data and instructions are kept for processing. Other options like monitors and mice are peripheral devices for output and input.

A hybrid computer combines the characteristics of both analog and digital computers, allowing it to process both continuous physical data and discrete logical data.

IBM's 'Blue Eyes' technology uses sensors like video cameras to track eye movement and facial expressions, which are then processed by a computer to interpret human emotions or thoughts.

Software is a set of instructions, data, or programs used to operate computers and execute specific tasks. Unlike hardware, software is intangible and consists of the code that tells the hardware what to do.

The IBM System/390 (S/390) is a well-known family of mainframe computers. In contrast, the CRAY-2 and ETA-10 are classified as supercomputers, which are designed for high-speed scientific calculations.

PARAM is a series of supercomputers designed and assembled by the Centre for Development of Advanced Computing (C-DAC) in India. The first in the series, PARAM 8000, was launched in 1991.

Norton Utilities and PC Tools are classic examples of utility software used for system maintenance and optimization. Since all listed options are utilities, 'None of these' is the correct answer to which is NOT a utility.

Liveware is a term used to refer to the human element in a computer system. It distinguishes the people who operate and maintain the system from the hardware and software components.

Windows is an operating system, which is a type of software that manages the computer. Hardware refers to physical components like the monitor, keyboard, CPU, and mouse.

Opening emails, specifically those containing malicious attachments or links, is a primary way viruses spread. While just reading a plain-text email is usually safe, interacting with attachments is a high-risk activity.

A computer virus is a type of malicious software (malware) that replicates itself by infecting other files or programs. Its primary purpose is to spread from one computer to another and often to damage or destroy data.