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!
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.
Distinguish between ROM, PROM, EPROM, EEPROM. Ans: ROM: It also called Read Only Memory is a Permanent Memory. The data is permanently stored and cannot be changed in Perm
What are the Rules of Timescale directive Rules - 'Timescale directive, like all compiler directives, affects all modules compiled after directive, whether in same fi
hrm digrams
Describe queue? Ans: It is a type of data structure in which the data are stored in and retrieved on a First in first out (FIFO) basis. It grows in the direction of increasin
How are interrupt handled by the operating system? The fundamental interrupt mechanism works as follows: The CPU hardware has wire called the interrupt-request line which
How to select valid lines for secondary list? To stop the user from selecting invalid lines, ABAP/4 offers various possibilities. At the end of the processing block END-OF-SEL
What is skew? Clock Skew: In circuit design, clock skew is a phenomenon within synchronous circuits wherein the clock signal (sent through the clock circuit) arrives at dive
Q. Explain about strategic planning and sensitivity training? Formulation of business strategy with the due consideration of environmental analysis and organizational appraisal
Execution error and compilation error: Errors like as mismatch of data types or array out of bound error are called as execution errors or runtime errors. These errors are us
Downcasting concept is the casting from a general to a more particular type, i.e. casting down the hierarchy in programming
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