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DVD-ROM employs same principle as a CD-ROM for reading and writing. However a smaller wavelength laser beam is used. Total capacity of DVD-ROM is 8.5GB. In double-sided DVD-ROM two these disks are stuck back to back that allows recording on both sides. This requires disk to be reversed to read reverse side. With both side recording and with each side storing 8.5GB total capacity is 17GB.
In both DVD-ROMs and CD-ROMs the density of data stored is constant throughout spiral track. In order to attain a constant readout rate the disk should rotate faster near centre and slower at outer tracks to maintain a constant linear velocity (CLV) between head and CD-ROM/DVD-ROM platter. So CLV disks are rotated at variable speed. Compare it with mechanism of constant angular velocity (CAV) in which disk is rotated at a constant speed. So in CAV the density of information storage on outside sectors is low.
Objects, messages, class, inheritance and polymorphism are the major concepts of object orientation.
Traffic Capacity is given by? Traffic Capacity = Switching capacity × Theoretical maximum load.
Q. Find the de Broglie wavelength of electron in the fourth orbit of hydrogen atom. We know that, λ = 2πr / n λ4 = 2πr 4 / 4 = 2π (4 2 r1) / 4 = 2 X
What is secondary list? It permits you to enhance the information presented in the basic list. The user can, for example, select a line of the basic list for which he require
Define the role of organizationin computer architecture The organization is the set of resources that realizes the architecture which include the CPU, the memory and I/O contro
Question: (a) (i) Briefly define the term "Isotype". (ii) With the help of diagrams, describe the rules of "Isotype". (b) Elaborate on your understanding of internationa
What are the event key words in interactive reporting? Event Keyword Event AT LINE-SELECTION Moment at which the u
What are the features of the hardwired control? A controller that uses this approach can function at high speed. It has little flexibility and the complexity of the instruction
Andrew, a 17 zear old university student decided to hold a post exams party for his friends. Andrew asked Kath, a family friend and the owner of 'Kath's Katerers' to supply food
Explain network security. Network security means the security of networks and their services from unauthorized access, changes, destruction or disclosure. It gives for assuranc
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