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Psychology Essay

1043 words - 5 pages

SILULO ULUTHO TECHNOLOGIES
STUDENT: CYNTHIA NOLUTHANDO MLANJANA
STUDENT NUMBER: 140114
Introduction Assignment
QUESTION 1
1. ROM (Read-only memory) is memory that can be read but not changed. RAM is the memory that stores data and instructions temporarily,; that is , while the computer is switched on.

2. Data can be presented in two main pain forms: hard copies and soft copies. A hard copy is a physical reproduction or representation of the data, such as a printed page or photograph. A soft copy is an electronic version of the data, such as a file. Soft copies can be transferred by a number of means, such as through email, USB drives or disk drives. They are easier to duplicate ...view middle of the document...

Mainframes have large data storage capacity and can process bulk data. They are used to perform tasks such as scientific calculations and data processing for large business, banks, insurance, companies, and manufacturers.
b) Supercomputer
A very fast computer that can process billions of instructions per second. Supercomputers are used to perform tasks that involve processing large amounts of data, and processing tasks with complex requirements such as weather forecasting, biomedical applications, and aircraft design.

c) Mini-computer
A multi-user computer that can support 4 to 200 users simultaneously. Minicomputers are used to perform tasks such as hospital administration and manufacturing processes.
d) Personal computer (PC)
A small, single-user computer that you can use to perform a variety of tasks, ranging from maintaining household finances to managing the finances of a large company
e) Server
A computer that makes programs and data available to a network of computers. It also handles communication between interconnected computers. Servers can also be used as multiuser computers.
QUESTION 2
1. Ports are an interface to which you connect a device. There are three types of ports: serial, parallel, and USB. Serial and parallel ports are generally used to connect devices such as a keyboard, a mouse, a printer, and a modem. USB ports are replacing serial and parallel ports.

2. The PC performs a power-on self-test (POST). The POST is a small computer program within the BIOS that checks for hardware failures. A single beep after the POST signals that everything's okay. Other beep sequences signal a hardware failure, and PC repair specialists compare these sequences with a chart to determine which component has failed.

3. Most activities follow the Input-Process-Output (I-P-O) cycle. By entering data and instructions by using a keyboard or other input device, such a s a mouse or scanner, you supply input to the computer. A component of the computer system, the microprocessor or CPU (Central Processing Unit), processes the input and creates the information known as the output. The output most frequently appears on the computer screen or can be produced in print by using a computer...

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