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Xpress Learning - Computer Fundamentals of Programming an IT by Pearson
book

Xpress Learning - Computer Fundamentals of Programming an IT by Pearson

by Ashok N. Kamthane, Rohit Khurana
May 2024
Beginner to intermediate content levelBeginner to intermediate
465 pages
16h 14m
English
Pearson India
Content preview from Xpress Learning - Computer Fundamentals of Programming an IT by Pearson
I-28 Computer Fundamentals
A CD is a shiny, silver colour metal disk of 12 cm in diameter. A typical optical disk is made
up of three layers: a polycarbonate base through which light can pass, a layer of aluminium
and a protective layer of acrylic on top of that. The pits of CD are typically 0.5 microns wide,
0.83–3 microns long and 0.15 microns deep. A CD has one track that spirals from the centre to
the outside edge. If one could remove the track from a standard 12 cm CD, it would stretch for
three and a half miles. The single track is divided into sectors of equal length and density. Files
are stored on these particular contiguous sectors. ...
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Publisher Resources

ISBN: 9781299954878