By Graham Taylor (auth.)

Show description

Read Online or Download Computer Studies GCSE PDF

Best study aids books

1001 Ways to Pay for College: Practical Strategies to Make Any College Affordable

Thoroughly revised with up-to-date descriptions, touch details, web pages, and on hand monies, this consultant to financing greater schooling is the single source scholars have to fund their pursuit of information. Balancing distinctive factors with real-life examples and functional assets, the featured subject matters contain discovering and profitable scholarships, soliciting for a reassessment from faculties for extra monetary reduction, maximizing the help of country and federal governments, benefiting from academic tax breaks, and profiting from government-subsidized pupil loans.

The Power of Vedic Maths (2nd Edition)


With Trigonometry

Vedic arithmetic is gaining common acceptance one of the scholar group in addition to maths enthusiasts. The absence of a ebook, explaining the suggestions in an easy language, has been felt acutely for a very long time. This ebook has been written utilizing a step by step procedure, and makes an attempt to fill the present void. It comprises a number of solved difficulties as well as one thousand perform issues of solutions. it is also a unique bankruptcy which indicates the appliance of the innovations to difficulties set in aggressive checks like CAT, CET etc.

People from all walks of existence together with institution and faculty scholars, lecturers, mom and dad and in addition these from non-mathematical components of analysis will notice the fun of fixing mathematical difficulties utilizing the fantastic set of recommendations known as Vedic Maths.

Extra info for Computer Studies GCSE

Sample text

However, magnetic disks themselves continue to be improved in terms of cost and performance. Disks are excellent as DASDs for large data files and data bases at a reasonable cost. Magnetic disks vary considerably. This usually depends on the size of the computer system they are used with. A. Uses: • • • • • Off-line storage of large sequential files. Tapes can be conveniently kept in storage racks and are loaded on to tape drives and processed as they are needed. Back-up storage for on-line disk files.

B) RAM is volatile and is used as temporary store. ROM is non-volatile and is used as 'permanent' store - it is non-destructable. (c) RAM is used for temporary store of data and/or programs as they are being worked on in main memory. It can be changed by a user program. g. the operating system, wordprocessing chip. • • The capacitor is a two-state device that stores a tiny electrical charge (the '1' bit) or no charge ('0' bit). The transistor works as a switch to determine whether the capacitor is charged.

E. read or recorded. The bits in a character or word are added and checked against a parity digit previously calculated. In Fig. e. the total number of bits including the parity bit is odd. Fig. 2 shows how data is organised on magnetic tape. e. read or recorded, a block at a time. 2 How data is organised on magnetic tape. (typically ~ inch to 1 inch) to allow the tape to speed up and slow down at the beginning and end of each block. The header label at the start identifies the filename and catalogue (directory) number and the trailer (footer) label indicates the end of data in the file and will identify whether data continues further on or on other tapes.

Download PDF sample

Rated 4.40 of 5 – based on 50 votes