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What is the function of Virtual Memory?
SKPasu
- Aug 19th, 2010
With virtual memory, the computer can look for areas of RAM that have not been used recently and copy them onto the hard disk. This frees up space in RAM to load the new application. Because it does t...
s_kalaiselvan
- Oct 11th, 2007
Hai When we use the application goes to over the RAM capability some amount of space in the HDD act as a RAM for managing the application.that is called Virual memory.if the system run...
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How to create 0 byte file? How to change the timestamp of a file without opening a file?
prasul
- Dec 26th, 2007
Touch is the same command that is used to create a zero byte file on the server.
anonymous
- Oct 30th, 2007
For 2nd question, use Unix/Linux utility called 'touch'
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Describe four general strategies for dealing with deadlocks.
nilupul21
- Aug 23rd, 2009
Strategies to dealt with deadlocks are: Ignore deadlock (This is done in systems which are infrequently meeting with deadlocks) Detection and recovering Avoiding deadl...
visitnitya
- Jan 15th, 2008
The four techniques are-1)mutual exclusion2)circular wait3)hold & wait4)no premption
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What is the state of a process when it is in job queue?
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If the OS is just a collection pf programs and if it is executed by the processor just like any other program, is the OS a process? If so, how is it controlled?
?
UncaAlby
- Nov 8th, 2008
Yes, it is executed by the hardware like any other program. It controls itself.This is why you have the concept of a kernel, which would be the smallest possible piece of the operating system th...
sk_seeker
- Dec 22nd, 2007
Execution contexts can be of two types: thread/process context OR an Interrupt context. What this means is that to execute code, one has to be in a thread context or a an Interrupt context. OS code or...
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Linux DNS Server
What is the TTL in the name.conf file?
Nikhil Gavhane
- Jan 28th, 2016
Time to live
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Root content of XP OS
What is the root content of XP OS?
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Windows Scheduling
What type of scheduling is used in windows?
pllaxman
- Apr 11th, 2008
The flow of Mail Server depends upon the Mail Server Configuration done by a System Admin & also depends upon the software packages like, postmaster, exchange server, etc.,!Generally the base conc...
pllaxman
- Apr 11th, 2008
There are many different scheduling process can be done in windows like data backup schedule, windows automatic update schedule, firewall settings, etc., lot more!Can you please clarify me what type of scheduling you require??
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.log File
What is the use of (.log) file. Where it is used?
contact_sravan
- Oct 31st, 2008
.log Files are used as log registers. These files contains the user details like session starting time and session ending time
sravan_reddy001
- Jun 24th, 2008
The log file is just as same as the normal text file. The content of these files are written by applications(the logs created by them). These files will have all the actions performed by the software which might of use to user to know the behaviour of the application
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PC Refresh
When a user is refresh his PC then what process does the system go?
rrsain
- Aug 6th, 2008
When anyone refreshes the pc, the random access memory of system is refreshed or we can say the processes required less frequently are terminated and the RAM is less utilized by those processes
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Password Protect Win XP Folder
How can we password protect a folder in Win XP?
srimurthyb
- Nov 22nd, 2011
Hai
If i use the first option i am not getting the sharing tab
My OS is Windows XP
it s a multi usable desktop with 4- 5 users in it,
and more ever it says admin password is required ..please suggest me how can i bypass all the thing and protect my folder
Thank youmummanakal
- Aug 20th, 2009
Password Protect Folders in XP Do you share a computer with other users and want some extra security on your folders? There are two ways to password protect a folder built into Windows XP (for other W...
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Deadlock Cycle
If there is a cycle then it is necessary that it will be in deadlock? Elaborate
khanrijwan
- Sep 24th, 2010
If all the resources have only one instance and there is a cycle in the resource allocation graph, then deadlock is conform.
vurukalasc
- Apr 30th, 2009
Cycle in Resource Allocation Graph (RAG) does not mean dead lock. It is the necessary condition but not the sufficient condition to check for dead lockonly if the resource has single instance then we can say that cycle in RAG means deadlock.
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Banker's algorithm
Why Banker's algorithm to avoid deadlock is called so?
Priyal jain
- Nov 29th, 2017
The name was chosen because the algorithm could be used in a banking system to ensure that the bank never allocated its available cash in such a way that it could no longer satisfy the needs of all customers.
gpppgp
- Sep 1st, 2009
After the installation of so many networks newly in the bank, there was a new need to avoid the deadlock at that situation. this is not a joke, its true. the algorithm's main intention is allocate available resources basing on the available requests.
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Blue Screen Dump Error
List the possible causes for blue screen dump error in Windows Operating System?
radhakrushna
- Dec 17th, 2010
There could be a lot of problem for Blue Screen Error. There are some answers which I can think:Miss mathed of driver.Any Hardware Problem.Any system file corruption.But must of the system in my experience I have seen the problem due to RAM issue.
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Resource Allocator
What is the function of resource allocator in Operating System?
kranth.pothuganti
- Aug 19th, 2009
Resource allocator is a module of the operating system that is used to assign the resources to the processes that reqoested those resources in an economical way so that the utilization of resources is optimal.
vimalat
- Jul 28th, 2009
Resource allocator is used to assign the available resource in a economic way. It is a part of the resource management.
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Hidden Files
How to create hidden files in UNIX?
kranth.pothuganti
- Aug 19th, 2009
Unix will treat all the files whose names start with a '.'?as hidden.So you can prevent your files from getting listed by LS command by changing it's name such that it starts with a '.'
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Operating System
What are Batch Operating System and a Time-Sharing Operating System?
pravin_thapa
- Sep 22nd, 2009
Batch operating system are those where we collect similar kind of process make a batch and than submitted to processor to process.
Time sharing where processor jumps between process when a process in its input
session or output session processor jumps to the process which is in process
phase.jsharon
- Aug 29th, 2009
Time-sharing refers to sharing a computing resource among many users by multitasking.Because early mainframes and minicomputers were extremely expensive, it was rarely possible to allow a single user ...
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Before Operating Systems
Before the introduction of operating systems what concept was used in computer?
Anuj
- Jul 9th, 2014
Monitor Programs
Lokesh M
- Nov 30th, 2011
Prior to the introduction of Operating System, operation instructions were generally fed into the electronic system bit by bit on rows of mechanical switches or by jumper wires on plug boards.
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Cache Memory Access Time
A hierarical catche memory subsystem has a catche access time of 50ns and the main storage access time is of 500ns . If 80% of memory request are for the read and th ehot ratio of 0.9, what is the average access time of the system considering only memory read cycle in the write through scheme?
Salihu
- Aug 28th, 2018
The access time of a cache memory is 120 ns and that of main memory 900 ns. It is estimated that 80% of the memory requests are for read and remaining 20% for write. The hit ratio for read access only...
swarna_coolguy
- Aug 27th, 2010
Average access time for memory read=hit ratio*cache access time+(1-hit ratio)*main memory access timeTherefore , Avg access time = 0.9 * 50ns + ( 1- 0.9 ) * 500ns = 95 ns
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Print latest records with UNIX commands
What is the command to print latest 5 records in UNIX (command level)
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