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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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If the OS is already corrupted how a person can go into mycomputer management & change the password
naveen_b2005
- May 12th, 2007
First repair the OS by using Repair option after that you can easily change the passwordRegards...Naveen kumar
Kaushal Patel
- Jun 1st, 2006
First turn off computerturn it on after 15 second.bwhen you see your manufacture's logo, press F8 key from keyboardselect "safe mode"Select windows XP home edition or windows XP proffessional edition....
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I have Win95 installed in my computer. As am usng the company laptop i dint use the system for long. When i tried to use now It got struch after getting the username and password. What can i do with now. i dont knwo where the problem is. I consulted one h/w engineer to c he said to change the entire processor. i dont think he analysed proper.
Abhilash
- Sep 11th, 2007
Try to enter into Windows 95 through external bootable CD, and then change the relevant password, normally any given password needs to be updated for every 15-30 days, and it depends (specially for laptops).
naveen_b2005
- May 12th, 2007
Dear,Please reinstall win95 without formating or Update by win98 by choose upgrade optionRegards....Naveen kumar
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What is the length of IR(Instruction register) 1. 6 bits 2. 8 bits 3. 12 bits 4. 16 bits
vinitogupta
- Apr 19th, 2007
hi,the length of Instruction Register is usually 8bit but it depends which IR u asking aboutThanks,Vinit
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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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Non volatile memory
The term "non volatile memory" states 1. that memory is retained in the memory unit for some time even after power failure to the memory unit 2. that memory is lost by power failure but regained as soon as power is restored 3. that memory is retained in the memory unit at higher temperature 4. that memory is retained in the memory unit for years after power...
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