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. Interrupt - Driven Input-output?
Problem with programmed I/O is that processor has to wait a long time for I/O interface to see whether a device is free or waits until completion of I/O. Result is that the performance of processor goes down extremely. What is the solution? What about processor going back to do other useful work without waiting for I/O device to finish or get freed up? However how will processor be intimated about completion of I/O or a device is ready for I/O? A well-organized mechanism was considered for this which is referred to as interrupt-driven I/O. In this mechanism provision of interruption of processor work once device has completed I/O or when it's ready for I/O has been provided.
Interrupt-driven I/O mechanism for transferring a block of data is displayed in Figure 5(b). Please note after issuing a read command (for input) CPU goes off to do some other useful work whereas I/O interface proceeds to read data from connected device. On completion of an instruction cycle CPU checks for interrupts (that will happen when data is in data register of I/O interface and it now requires CPU's attention). Now CPU saves important register and processor status of executing program in a stack and requests I/O device to provide its data that is placed on data bus by I/O device. After taking needed action with data CPU can go back to program it was executing before interrupt.
What is race around condition? Ans: Race Around Condition:- Jn Kn Q(n+1) output 0 1 0 1 0 0
In floating point numbers when so you say that an overflow or underflow has occurred? Ans: A) In single precision numbers when an exponent is less than +127 then we say that
What are the characteristics of semiconductor RAM memories? They are available in a wide range of speeds. Their cycle time range from 100ns to less than 10ns. The
What is macro-expansion? Macro calls lead to macro expansion. Throughout macro expansion, the macro call statement is replaced through a sequence of assembly statements.
(a) Explian two limitations of dead-box analysis. (b) Describe why memory analysis is difficult. (c) With reference to the "Shadow Walker" rootkit, explain what is meant by
example pumping lemma.
hrm digrams
What are the disadvantages of Public Key Cryptography? Disadvantages of Public Key Cryptography are as given below: a) It is used to encrypt a secret key that is used to e
Q. What is Sun and Nis Law? The Sun and Ni's Law is a simplification of Amdahl's Law and Gustafson's Law. The basic concept underlying Sun and Ni's Law is to find solution to a
Explain FIFO Page replacement algorithm. FIFO policy: This policy only removes pages in the order they entered in the main memory. By using this policy we simply eliminate a
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