Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. What is Compact Disk ROM?
Both audio CD and CD-ROM (compact disk read-only memory) share similar technology. Main difference is that CD-ROM players are more rugged and have error correction devices to ensure that data are appropriately transferred from disk to computer. Both types of disk are made the same way. Disk is created from a resin like polycarbonate. Digitally recorded information (either music or computer data) is imprinted as a sequence of microscopic pits on surface of polycarbonate. After that Pitted surface is coated with a highly reflective surface frequently aluminium. Shiny surface is protected against scratches and dust by a topcoat of clear acrylic. Lastly a label can be silk-screened on acrylic.
Figure: The CD Surface and Operation
Information is retrieved from a CD or CD-ROM by a low-powered laser housed in an optical-disk player or a drive unit. The laser shines via clear polycarbonate whereas a motor spins disk past it (Figure above). Intensity of reflected light of laser alters as it encounters a pit. Specially if laser beam falls on a pit light scatters and a low intensity is reflected back to source. Areas between pits are termed as lands. A land is a flat surface that reflects back at a higher intensity. Change between lands and pits is detected by photo sensor and converted in a digital signal. Sensor tests surface at regular intervals. Beginning or end of a pit signifies a 1 when no change in elevation takes place between intervals then a 0 is recorded. Data on CD-ROM are arranged like sequence of blocks.
Processors can broadly be seperated into the categories of: CISC, RISC, hybrid, and special purpose.
What is domain analysis? Domain analysis is concerned with devising a precise, concise, understandable and correct model of the real world. Analysis starts with problem statem
Explain two dimensional array In two dimensional arrays, array is a pointer-to-pointer-to-data type.: at the first level, it points to a block of pointers, one for each row. Th
Explain about the non-repudiation? Non Repudiation: Assurance which the sender is provided along with proof of delivery and which the recipient is given along with proof
application of de moiver theorem in software engineering
Explain the T Flip Flop? The toggle, or T, flip-flop is the bistable device that changes state on command from a common input terminal. Truth Table
What is the last entry in all BDC tables? In all BDC tables the last entry is to save the data by using the field name BDC_OKCODE and a field value of '/11'.
Dear, I''m an engineering post graduate in computer science. I would like to work as online tutor. please suggest ideas. Thank You.
Weight Training Calculations -Artificial intelligence: Because we have more weights in our network than in perceptrons, first we have to introduce the notation: wij to denote t
(a) Explain in a few sentences the difference between a natural frequency and a resonant frequency. Also clarify why for a specific system or component these frequencies may diff
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd