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. Major problems associated in writing with cache memories?
The data in main and cache memory can be written by processors or I/O devices. The major problems associated in writing with cache memories are:
a) The contents of cache and main memory can be changed by more than one device. For illustration CPU can write to caches and I/O module can directly write to main memory. This can result in inconsistency in values of main and cache memory.
b) In case of multiple CPUs with different cache a word changed in one cache automatically invalidates that specific word in other cache as well.
The proposed schemes for writing in system with caches are:
(a) Write through: Write the data in main memory as well as cache memory. The other CPUs - Cache combination has to watch with traffic to main memory and make appropriate modification in contents of cache. The drawback of this scheme is that a bottleneck is created because of large number of accesses to main memory by different CPUs.
(b) Write block: In this technique updates are made only in cache, setting a bit known as Update bit. Only those blocks whose update bit is set is replaced in main memory. However here all accesses to main memory whether from other CPUs or I/O modules required from cache resulting in complex circuitry.
(c) Instruction Cache: An instruction cache is one that is used for accessing only instructions and nothing else. Benefit of such a cache is that as instructions don't change we do not need to write instruction cache back to memory unlike data storage cache.
Which device changes from serial data to parallel data ? Ans. Demultiplexer is the device that changes from serial data to parallel data. Demultiplexer takes data in from on
Busy hour traffic is the (A) maximum average simultaneous traffic. (B) traffic during peak hour. (C) traffic when all subscribers are engaged. (D) the durat
What are controls? How to use them? Give examples for control. Controls are objects that can be placed in a form. The dissimilar controls are available in the Tool Box. After
Q. What do you mean by Segment numbers? There is a good reason for not leaving determination of segment numbers up to assembler. It permits programs written in 8086 assembly
Dictator Dim wants to replace counting, in particular, counting the population of his land. To keep an accurate population count, Dictator Dim has instructed his secretary to add o
Q. Explain about Zip Drive? Zip Drive: Loads of files, Volumes of data have definitely increased onus on today's computer user and protection of this data is what bugs every
Question: Computer forensic examiners should be concerned with at least two important settings stored in RTC/NVRAM, which is accessed by the BIOS software most often called Set
Q. Amdahl Law to measure speed up performance? Remember that speed up factor assists us in knowing relative gain attained in shifting execution of a task from sequential comput
Rigging is use for if we need to give animation for any object or character then we apply to character or object internal bone setting(like our bones).that is known as rigging. Whe
Q. Illustrate Shift Micro-operations? Shift is a valuable operation that can be used for serial transfer of data. These operations can also be used along with other (arithmetic
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