Tham khảo tài liệu 'giáo trình phân tích nguyên lý ứng dụng cấu tạo và công dụng của máy in theo setup catridge p4', công nghệ thông tin, quản trị mạng phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Rereen normally required if errors are encountered. Data is not current. Error correction is more difficult. Question 2. Online Processing System - Def Inputs data enters the computer directly as soon as it is being transacted. There information will be processed immediately and updated into the master file. - Ads Enter availability of information for decision making. More accurate data capture. Schedules suits user. - Dis CPU time is used less efficiently. Random arrival of transactions terminal operator process each transaction separately. More expensive than batch processing. Question 3. Real Time Processing System - Def One which controls the environment by receiving data processing them and returning results sufficiently quickly to affect the functioning of the environment at that time. - Ads Response time is very critical and sufficient quick. - Dis Expensive hardware software. Very complex in terms of hardware software. Chapter 4 PRINTERS AND TERMINALS. Question 1. Classification of printers 1. Classifying printers according to speed. a. Serial printers Slow printers that print one character at a time. Eg Dot matrix printers Daisywheel printers b. Line printers Medium to high speed printers that can print in excess of 2000 lines per minute. Eg Chain Printers Band Printers Drum Printers 2. Calssifying printers according to method of printing a. Impact printers Use hammers or prints to strike a print rebbon in order to form the character on the paper. b. Non impact printers Use more silent methods of printing. Eg Thermal printers Ink Jet printers Lazers printers 3. Classifying printers according to print quality Kinds of quality printers Draft quality Near letter quality NLQ Letter quality Graphic quality Question 2. Describe some types of printer 1. According to speed a. Dot matrix printer - Serial impact printers that can print draft near letter quality and a limited amount of graphics. - The print resolution is generally lower than lazer printers. b. .
