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DOS style backslashes to UNIX style slashes
- Write a script to convert all DOS style backslashes to UNIX style slashes in a list of filesI am not sure if this question has been asked before. I am newbie to this I would appreciate you answer?
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What is distributed Systems?
Distribute the computation among several physical processors.Loosely coupled system – each processor has its own local memory; processors communicate with one another through various communications lines, such as high-speed buses or telephone linesAdvantages of distributed systems:->Resources Sharing ->Computation speed up – load sharing ->Reliability->Communications
pallvi sharma
- Dec 7th, 2007
Distributed system in genral refers to n/w o.s in which various systems (computers) are connected to sharing some of resources like printer etc. Each system have own data (including files etc) and whe...
vigrem
- Jul 26th, 2007
Distributed computing is a method of computer processing in which different parts of a program run simultaneously on two or more computers that are communicating with each other over a network. D...
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What is the state of the processor, when a process is waiting for some event to occur?
Waiting state
00elton00
- Aug 5th, 2007
If the process is waiting for something to occur, then the process, and not the processor, should be in the waiting state.The processor would be scheduled to any other ready process, and if none is present, the the processor would be in the idle state.
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What resources are used when a thread created? How do they differ from those when a process is created?
When a thread is created the threads does not require any new resources to execute the thread shares the resources like memory of the process to which they belong to. The benefit of code sharing is that it allows an application to have several different threads of activity all within the same address space.Where as if a new process creation is very heavyweight because it always requires new address...
krisgroup
- Oct 22nd, 2007
hi,Adding to above one more important thing to keep in consideration,even threads share the same address space of the process, each thread has its own stack so if u are running multithreading program ...
sagar.singh
- Aug 23rd, 2007
Thread:In case of thread only one copy of resources are made. means Resources are shared between different threads. This is done on a synchronised basis.Process:A separate instances of resources are alloted to different processes at same time and they are not synchronised.
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Define Demand Paging, Page fault interrupt, and Trashing?
Demand Paging: Demand paging is the paging policy that a page is not read into memory until it is requested, that is, until there is a page fault on the page. Page fault interrupt: A page fault interrupt occurs when a memory reference is made to a page that is not in memory.The present bit in the page table entry will be found to be off by the virtual memory hardware and it will signal an interrupt. Trashing:...
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List of CPU Scheduling algorithms implemented in Windows Operating System
Hi As we all Know that the OS use various CPU Scheduling algorithm's. I would like to know what Algorithms are used in various OS(Specially in Windows OS) and the purpose.Thank You Julie
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What do you mean by deadlock?
Deadlock is a situation where a group of processes are all blocked and none of them can become unblocked until one of the other becomes unblocked.The simplest deadlock is two processes each of which is waiting for a message from the other.
ramesh kattamuri
- Sep 17th, 2007
Deadlock is a situation know as permanent waiting state.where a group of processes are blocked and none of them can become unblocked until one of the other becomes unblocked.
snehankita
- Jun 13th, 2007
Deadlock can be defined as a permanent blocking of the processess which are either competing for resources or communicating with each other.
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Give an example of microkernel?
Amoeba, WinNT, Minix
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Define task and TCB?
pbchaudhari
- Aug 26th, 2007
A Process Control Block (PCB, also called Task Control Block or Task Struct) is a data structure in the operating system kernel containing the information needed to manage a particular process. The PCB is "the manifestation of a process in an operating system"
amit
- Oct 16th, 2006
Task control block that hold all information related to task
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What is Dispatcher?
->Dispatcher module gives control of the CPU to the process selected by the short-term scheduler; this involves:Switching contextSwitching to user modeJumping to the proper location in the user program to restart that program Dispatch latency – time it takes for the dispatcher to stop one process and start another running.
pbchaudhari
- Aug 15th, 2007
The short-term scheduler (also known as the dispatcher) decides which of the ready, in memory processes are to be executed (allocated a CPU) next, following a clock interrupt, an IO interrupt, an op...
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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?. But this works in all machines. How?
00elton00
- Aug 5th, 2007
The above is possible due to the Paging. Both the Virtual Memory and the Physical Memory are broken down into pages of equal size, and a mapping, called the page table, is used to map virtual memory pages to physical memory pages.
Guest
- Jun 24th, 2006
Min virtual Memory size is 1.5 times of RAM (Exact RAM size + 11MB)Max Virtual Memory size is 3 times of RAM
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How chkdsk command works?
freakzilla007
- Jul 23rd, 2007
Checkdisk is a command in DOS and Microsoft Windows systems which verifies a hard disk or a floppy disk for file system integrity. It is similar to the fsck command in Unix. By default, CHKDSK neithe...
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What is difference between win95, 98, 2000, and NT? What is difference between unix and linux? Difference between windows and unix?
ravikumar_koyyada
- Jan 19th, 2007
Diff between unix and linux is that linux is look alike of unix which is freely available.Linux is based on the principles of FSF(free software foundation) and whose use is subject to GPL.Every applic...
Neel
- Nov 23rd, 2006
Difference between Win95,98,2000,NTwin95 and 98 is not networking based but win 2000 and NT are networking base OS and can be made multiuser.
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What are the main difference between Micro-Controller and Micro- Processor?
A microcontroller is by definition a is a computer on a chip. It includes all the necessary parts (including the memory) all in one IC. You just need to apply the power (and possibly clock signal) to that device and it starts executing the program programmed to it. A microcontroller generally has the main CPU core, ROM/EPROM/EEPROM/FLASH, RAM and some necessary functions (like timers and I/O controllers)...
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Differentiate between RAM and ROM?
Semiconductor memories are of two types: RAM (random access memory) and ROM (read only memory).RAM is a read/write memory. Information can be written into and read from a RAM. It is volatile memory.It stores information so long as power supply is on. ROM is permanent type memory. Its contents are not lost when power supply goes off. the user cannot write into a ROM.Its contents are decided by...
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