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why unix is more stable than windows?
rakesh trichy
- Oct 10th, 2008
Kernel Stability: "Both the UNIX kernel, and the design techniques it encourages, are renowned for stability. A system of several thousand servers must run reliably and without intervention to restart failed systems
rakesh trichy
- Oct 10th, 2008
Unix is more stable and does not go down as often as Windows does, therefore requires less administration and maintenance. Unix has greater built-in security and permissions features than Windows. it ...
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how we can say unix has greater flexibility than windows?
rakesh trichy
- Oct 10th, 2008
UNIX is also a very flexible operating system, both for system administrators and users. Program names can be changed, aliases can be defined. Arguments to programs can also be changed. New programs c...
rakesh trichy
- Oct 10th, 2008
Unix is more flexible and can be installed on many different types of machines, including main-frame computers, supercomputers and micro-computers. Unix you have in general the option of using either ...
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what are the latest versions of MSDOS?
what are the latest versions of dos?how does it help in booting the system?what are commands used?
rakesh trichy
- Oct 11th, 2008
MS-DOS 7.0 is the latest version of MS-DOS. Windows 95 included MS-DOS 7.0;this was not a stand alone version of MS-DOS and cannot be purchased by itself. ms-dos Version 7.0 of the Bernoulli driver is...
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page replacement algorithms
which is the best page replacement algorithm and y?
sneha
- Sep 10th, 2018
LRU pace replacement algorithm
rakesh trichy
- Oct 11th, 2008
The Optimal Page Replacement Algorithm:The best possible page replacement algorithm is easy to describe but impossible to implement.
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Root Directory
The root directory of disk should be placed 1. at a fixed address in main memory 2. at a fixed location on disk 3. anywhere on the disk 4. at a fixed location on the system disk
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the process of transforming one bit pattern into another by bit-wise operations is called 1. masking 2. pruning 3. biting 4. chopping
R Abarna
- Dec 16th, 2018
Masking
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Q which of the following scheduling policy is well suited for a time-shared operating system ? 1 shortest job first 2 round robin 3 first come=first served 4 elevator
thukral.rahul
- Jan 12th, 2010
In a time sharing system, the main concern is to reduce the response time so that the user is given an abstraction that whole of the processor is dedicated to the user process even though multiple pro...
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what is the mail process from source to destination ?
rakesh trichy
- Oct 11th, 2008
Destination data indicating destinations to which messages are to be transmitted are prestored in thestorage device so that an operator need not input destination data fortransmission of every message...
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What is the difference between synchronization and mutual exclusion?
Jared Southern
- Sep 23rd, 2011
As I understand it, and I'm just revising it, Conditional synchronisation is the mechanism that allows one to achieve mutual exclusion in a program.
Regards
Jaredrakesh trichy
- Oct 11th, 2008
Mutual Exclusion:1. Lock and unlock operations are always performed by the same thread. 2. Thread blocked on semaphore cannot be awakened by a signal. Synchronization: 1. Lock and unlock operations...
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Briefly explain about the differences between the concepts that are involved in Windows and UNIX operating system?
rakesh trichy
- Oct 11th, 2008
Unix is more flexible and can be installed on many different types of machines, including main-frame computers, supercomputers and micro-computers.- Unix is more stable and does not go down as often ...
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What is the main component of operating system?
gokulnithish
- Jun 8th, 2010
There are three main components:1. Control Programs 2. Sytem Service Programs 3. Utility Programs 1. Control Programs Control & maintain the operation of computer Initial program loader (IPL)...
rakesh trichy
- Oct 11th, 2008
There are three main components:1. Control programs2. Sytem Service Programs3. Utility programs
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What is Memory-Management Unit (MMU)?
->Hardware device that maps virtual to physical address.In MMU scheme, the value in the relocation register is added to every address generated by a user process at the time it is sent to memory.->The user program deals with logical addresses; it never sees the real physical addresses.
rakesh trichy
- Oct 12th, 2008
A memory management unit (MMU), sometimes called paged memory management unit (PMMU), is a computer hardware component responsible for handling accesses to memory requested by the central processing u...
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What is CPU Scheduler?
->Selects from among the processes in memory that are ready to execute, and allocates the CPU to one of them.->CPU scheduling decisions may take place when a process:1.Switches from running to waiting state.2.Switches from running to ready state.3.Switches from waiting to ready.4.Terminates.->Scheduling under 1 and 4 is nonpreemptive.->All other scheduling is preemptive.
rakesh trichy
- Oct 12th, 2008
Disk schedulers in current operating systems are generally work-conserving, i.e., they schedule a request as soon as the previous request has finished. Such schedulers often require multiple outstandi...
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Difference between Primary storage and secondary storage?
Main memory: – only large storage media that the CPU can access directly.Secondary storage: – extension of main memory that provides large nonvolatile storage capacity.
rakesh trichy
- Oct 12th, 2008
Primary is were the operating system and other files are stored which is usually the hard drive. Secondary is a second hard drive or a CD/DVD ROM or 3 1/4 inch floppy drive or any other type of devic...
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Common Functions of Interrupts?
->Interrupt transfers control to the interrupt service routine generally, through the interrupt vector, which contains the addresses of all the service routines.->Interrupt architecture must save the address of the interrupted instruction.->Incoming interrupts are disabled while another interrupt is being processed to prevent a lost interrupt.->A...
rakesh trichy
- Oct 12th, 2008
8051:InterruptNumber Description Address0 EXTERNAL INT 0 0003h1 TIMER/COUNTER 0 000Bh2 EXTERNAL INT 1 0013h3 TIMER/COUNTER 1 001Bh4 SERIAL PORT 0023heg program..unsigned int interruptcnt;unsigned cha...
