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What is an I/O buffer? What is the advantage of buffering? Is buffering always effective? Justify your answer with help of an example.
One type of I/O requirement arises from devices which have a very high character density like tapes and disks. With these attributes, it is not possible to regulate communication along with devices on a character-by-character basis. Hence, the information transfer is regulated in blocks of information. In addition, sometimes this may need some type of format control to structure the information to suit the device and/or data characteristics. For example, a disk drive is different from a line printer or an image scanner.
For each of these devices, the format and structure of information is dissimilar. It should be examined that the rate at which a device may offer data and the rates at which an end application may consume it might be significantly different. In place of these differences, the OS should offer uniform and easy to use I/O mechanisms. Generally, this is done by providing an I/O buffer. The OS manages this buffer thus as to be able to comply with the requirements of both the producer and consumer of data. Essentially, the buffers absorb mismatch in the data transfer rates of processor or memory on one side and device on the other.
Determine the registers are available in machines Typical registers, some of which are commonly available in machines. These registers are as follows:- Memory Addres
Instruction Length: Variable-length instructions (Intel 80x86, VAX) need multi-step fetch and decode, but permit for a much more flexible and compressed instruction set.
Rational performance of an agent - artificial intelligence: To summarize, an agent takes input from its violence and affects that environment. The rational performance of an a
1. countdown Example: countdown(5,[5,4,3,2,1]). NOTE - your function should be able to answer questions such as: ?- countdown(5,L). 2. count_occur Example: count_occur(7,[5,2,6
how to start a web designing would you please guide me
to find the area under curve
Multi-Layer Artificial Neural Networks - Artificial intelligence: Now we can look at more sophisticated ANNs, which are known multi-layer artificial neural networks because the
Write a CGI program that prints date and time at which it was run. #!/bin/sh # # CGI script that prints the date and time at which it was run # # Output the documen
Fundamentals of IT 1. Explain the Impact of Information Technology on governments and educational organizations. 2. Explain application and system software. 3. Briefly ex
Process of Minimax algorithm: Our aim is just to write the best of best score on the top branches of the tree that player one can guarantee to score if he chooses that move.
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