By Ian Sinclair (Auth.)
Covers the syllabus for urban and Guilds 424, utilizing the minimal of arithmetic, and together with feedback for functional paintings, workouts and multiple-choice questions with solutions. it may fill the necessity for a textbook on laptop technology that's in accordance with hands-on adventure with microcomputers
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Additional info for Computer Science. A Concise Introduction
If we take one K of memory as a simple example, the numbering of the bytes in such a memory unit will be from 0000000000 to 1111111111 (in denary, 0 to 1023), using ten binary digits. Within the computer, these digits are represented by electrical voltages, so that a 0 is represented by zero volts and a 1 by (usually) + 5 V. Our example of a 1 K memory could be connected to the CPU by ten connecting lines, and if each of these could carry either a 0 or a 1 signal, then each and any of the 1024 bytes in the memory could have its number placed in binary code on these lines.
Suggestions for practical work 1 Arrange to see computers used commercially for batch processing, numerical analysis and process control. 2 Devise and test data preparation methods for a proposed new tax on all personal possessions worth over £1,000. 3 Use a simulated industrial control system and check the effects of putting delays into control loops. Multiple-choice test questions 1 40 A computer user has to prepare six reports and then transmit them to a head office. This requires a combination of: (a) on-line and real-time computing Computers and programs (b) (c) (d) real-time and batch computing batch and on-line computing batch computing only 2 A firm prepares local area maps.
The days of taking a reel of tape to a computing room along with a request to have results at the end of the week have been replaced by typing a few instructions to a program running on a desktop machine and seeing the results on the screen as soon as they are processed. Exercise 2 Decide which of the following applications will require fast numerical processing: (a) Keeping records of books borrowed from a library, (b) Using a program which created technical drawings by computer. (c) Working out monthly salaries.