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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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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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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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Which is the first operating systems?
hari19784
- Sep 16th, 2007
The GM-NAA I/O input/output system of General Motors and North American Aviation was the first operating system in the history of computer science.[1]It was created in 1956 by Bob Patrick of General M...
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Configure Hard Disk Space
How to configure Hard Disk Space, file system and domain during XP installation?
sholanki
- Feb 14th, 2010
Insert your XP installation CD inside the CD ROM. Reboot your system. Go through the instructions. Make a new clean install of windows. It will ask you for hard disk partition. There you can change the space of each drive and can also make new drives of your desired space.
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Page Fault
When do pagefault occur? Describe the actions taken by the OS when page fault occurs.
venu chowdary
- Apr 6th, 2010
A page is a fixed-length block of memory that is used as a unit of transfer between physical memory and external storage like a disk, and a page fault is an interrupt (or exception) to the software ra...
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Operating Systems Virtual Memory
If a system has 128 MB RAM and 1 GB hard Disk, and a process decides to use its fully allotted Virtual Memory 2^32 - 2GB = 2 GB, How is it practically possible?
erdhavalpatel
- Jun 26th, 2010
The basic idea behind the VM is that the combined size of the program, data and stack may exceed the amount of physical memory avaliable for it. The operating system keeps those parts of the program currently in use in main memory and rest on disk. Thanks.
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Diffrence between segmantation and paging
Sujitha_Dhanaraj
- Jul 10th, 2010
Question in reference to VIDYA VENKITESWARAN's answer...In what sense do you say segmentation is visible to the user while paging is not. Can you elaborate on it..Thanks in advance
raj
- Apr 7th, 2007
Paging is a technic which uses fixed size?memory(physical)allocation & segmentation is variable size allocation.paging suffer from internal fragmentation & segmentation is suffer from external fragmentation......
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Solaris HBA Card model
How to find the HBA Card model, type or make in Solaris 10?
Ragyapa
- Aug 18th, 2010
# prtdiag -vThere look for "IO Cards":========================= IO Cards ========================= &n...
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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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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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Optimal Page Replacement
What do we mean by Optimal Page Replacement?
bhavna123
- Nov 2nd, 2010
Optimal Page Replacement refers to the removal of the page that will not be used in the future, for the longest period of time. It is the reverse of Least Recently Used.For Eg: You have the reference ...
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Memory protection is normally done by the 1. processor and associated hardware 2. operating system 3. compiler 4. user program
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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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Data Inconsistency / Critical Section
Consider the following program segments for two different processes (P1, P2) executing concurrently, where a and b are not shared variables, but x starts at zero and is a shared variable.
Case 1:"Processor #1 "for (a = 1; aAnil Kumar Katti
- Dec 31st, 2010
I think it is mentioned that 'x' is initialized to 0.I would solve it this way: Unrolling the loops, we get the following instructions to be executed in each of the following cases:C...
nancyagg
- Jul 11th, 2010
Part A : Since in case1 X is not initialized. Therefore the resulting values in case 1 will be some garbage values stored in X earlier.Whereas in case2 X has been initialized therefore the possib...
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Discuss the advantages and disadvantages of removing operating system altogether?
Jana Rthan
- Jan 3rd, 2011
Disadvantage:?Not easy to interact with the system.?Resource allocation is difficult. No back up is availableAdvantage?Direct HARDWARE ACCESS.
shorty_soos
- Jan 1st, 2010
It allows you to use your computer without any knowledge of coding. Without an operating system, your hardware would not work at all, until you wrote your own code for the hardware to do what you want...
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Difference between win98 and windowsXP?
parupradhi85
- Jul 22nd, 2008
Dear frnd,Win981. Win98 Support FAT file system & XP support NTFS And Also FAT. 2. Win98 Does not Having Remote Access facility While in XP there is.3. win98 Does not need faster proce...
parupradhi85
- Jul 21st, 2008
1. Win98 Support FAT file system & XP support NTFS And Also FAT. 2. Win98 Does not Having Remote Access facility While in XP there is. 3. win98 Does not need faster processing speed while XP Need ...
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Types of file system in linux?
sunilbaglur
- May 12th, 2011
Linux - File System format supportedEXT2 - Extended 2EXT3 - Extended 2 + JournalJFS - Journal file systemResier - Advanced JournalLVM - Logical Volume managerVFAT - FAT 16 / 32EXT 4 [WHICH IS LATEST IN RHEL6.0]
moorthyvsm
- Jul 8th, 2008
There are lot of file system types are used in Linux. Mostly Linux uses ext3 file ystem.You can know by using the command given below.fdisk /dev/dsafdisk /dev/hdaOnce you executed the above one just type "l" and it will show all fil system types in linux.
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