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Is a utility that reorganizes the files and unused space on an computer's hard disk so that the operating system accesess data more quickly and programs run faster?
defragger
What is the objective of a multiprogramming operating system?
minimise unused CPU time reduce incidence of peripheral-bound operations minimise total elapsed time prevent single programs from dominating the CPU
List five services provided by an operating system that are designed to make it more convenient for users to use the computer system In what cases it would be impossible for user-level programs to pr?
1. Program execution.The operating system loads the contents (orsections) of a file into memory and begins its execution. A user-levelprogram could not be trusted to properly allocate CPU time.2. I/O operations.Disks, tapes, serial lines, and other devices must becommunicated with at a very low level. The user need only specifythe device and the operation to perform on it, while the systemconverts that request into device- or controller-specific commands.User-level programs cannot be trusted to only access devices theyshould have access to and to only access them when they areotherwise unused.3. File-system manipulation.There are many details in file creation, deletion, allocation, and naming that users should not have to perform. Blocks of disk space are used by files and must be tracked. Deleting a file requires removing the name file information andfreeing the allocated blocks. Protections must also be checked toassure proper file access. User programs could neither ensureadherence to protection methods nor be trusted to allocate only freeblocks and deallocate blocks on file deletion.4. Communications.Message passing between systems requiresmessages be turned into packets of information, sent to the networkcontroller, transmitted across a communications medium, andreassembled by the destination system. Packet ordering and datacorrection must take place. Again, user programs might notcoordinate access to the network device, or they might receivepackets destined for other processes.5. Error detection.Error detection occurs at both the hardware andsoftware levels. At the hardware level, all data transfers must beinspected to ensure that data have not been corrupted in transit. Alldata on media must be checked to be sure they have not changedsince they were written to the media. At the software level, mediamust be checked for data consistency; for instance, do the numberof allocated and unallocated blocks of storage match the totalnumber on the device. There, errors are frequentlyprocess-independent (for instance, the corruption of data on a disk),so there must be a global program (the operating system) thathandles all types of errors. Also, by having errors processed by theoperating system, processes need not contain code to catch andcorrect all the errors possible on a system.
What five services provided by an operating system that are designed to make it more convenient for use?
1. Program execution. The operating system loads the contents (or sections) of a file into memory and begins its execution. A user-level program could not be trusted to properly allocate CPU time.2. I/O operations.Disks, tapes, serial lines, and other devices must be communicated with at a very low level. The user need only specify the device and the operation to perform on it, while the system converts that request into device- or controller-specific commands. User-level programs cannot be trusted to only access devices they should have access to and to only access them when they are otherwise unused.3. File-system manipulation. There are many details in file creation, deletion, allocation, and naming that users should not have to perform. Blocks of disk space are used by files and must be tracked. Deleting a file requires removing the name file information and freeing the allocated blocks. Protections must also be checked to assure proper file access. User programs could neither ensure adherence to protection methods nor be trusted to allocate only free blocks and deallocate blocks on file deletion.4. Communications. Message passing between systems requires messages be turned into packets of information, sent to the network controller, transmitted across a communications medium, and reassembled by the destination system. Packet ordering and data correction must take place. Again, user programs might not coordinate access to the network device, or they might receive packets destined for other processes.5. Error detection. Error detection occurs at both the hardware and software levels. At the hardware level, all data transfers must be inspected to ensure that data have not been corrupted in transit. All data on media must be checked to be sure they have not changed since they were written to the media. At the software level, media must be checked for data consistency; for instance, do the number of allocated and unallocated blocks of torage match the total number on the device. There, errors are frequently process-independent (for instance, the corruption of data on a disk), so there must be a global program (the operating system) that handles all types of errors. Also, by having errors processed by the operating system, processes need not contain code to catch and correct all the errors possible on a system.
What is the Difference between paging and demand paging in operating system?
paging is the process of memory management in which memory is allocated in the non contiguous form,i.e. the program is break into block of fixed size known as page and also the main memory also break down into block of same size known as frame or page frame. Now all this page are brought into the main memory but in the space available so they can be contiguous if they find whole space required by the program or if the space is available but in scattered form then they can give space in non contiguous form. But in demand paging only those pages are brought into main memory which are required to execute the program at that time when a program need other pages it will swap out the unused pages from the main memory and swap in the desired page thus allowing it to execute the program though the space available is not sufficient to bring the whole program into main memory..................One of the problem arises due to demand paging is page fault which is caused due to required page not found in main memory for which we require swapping. hey if you like my post don't forget to thank me....... for any further queries e-mail me at hemant_spidey3@yahoo.co.in or 1989hemantrajput@gmail.com
Is a utility that reorganizes the files and unused space on an computer's hard disk so that the operating system accesess data more quickly and programs run faster?
defragger
Should unused hardware be removed from a computer?
Every significant piece of hardware means another device driver, more drain on your batteries if your computer is a laptop, and more complexity to your system. If you upgrade your operating system, the old hardware may or may not be supported and it's another roadblock to upgrading. If you are sure you don't need a particular piece of hardware and doubt that you will use it in the future, and it's not difficult to remove, then it's a good idea to remove it. On the other hand, if you would need to open up your computer and do surgery to remove the hardware and are at all worried about whether or not you might mess up your computer, you may be better off leaving it alone.
Speed Up Your Computer with One Simple Process?
Computers often become slower over time. However, there are a variety of ways to speed up a computer without doing major upgrades. One of the best ways to increase the speed of a computer is to delete unused programs or files. Most computers have a significant amount of memory consumed by unused files or programs. Use the add/remove program utility in the control panel to remove unused programs. Files can be deleted manually.
What is PC organization?
PC organization is keeps your computer organized. This includes, but is not limited to:1. trashing old files2. cleaning the drivea: removing unused foldersb: freeing space3. tidying up the hard drive and desktop by removing unused items4. remove programs that are unused
How do you overcome causes of computer running slow?
Go to Control Panel and click add or remove programs, you can remove any unwanted or unused programs, but be careful of what you delete. Good luck =)
Why is your Computer Slow Part 2?
Installing of Unwanted Applications and Rarely used applications your computer might be slow down. To avoid this mistakesUninstall unwanted applications and Scan your system with antivirus software.Remove unused startup Items (Run > msconfig > Startup > Then remove unused startup item > Click Ok and Restart your system.)Open Run > Then type %temp% and click Ok. Then delete all temporary filesOpen Run > Then type Prefetch and Click Ok. Then delete all
What is the objective of a multiprogramming operating system?
minimise unused CPU time reduce incidence of peripheral-bound operations minimise total elapsed time prevent single programs from dominating the CPU
Is it all right if your system resources move from 63 percent to as low as 30 percent?
no it is not alright you need to be atleast 80% for good usage you need to remove all unused and not needed software on your system
What would cause constant system freezes in windows xp pro?
the most likely would be an internet virus. or maybe you didnt install the operating system correctly. to see whats using all your CPU press Ctrl+Alt+Del and click on the processes tab and it will show you how much of your computer 'effort' you are using. this could show maybe a unused program taking all of it.
Unused fees on credit line should be operating expenses or interest expense?
Interest Expense
WinXP computer randomly won't show icons in bottom-right hand corner the unused icons in system tray disappear and I have to restart What is wrong?
Nothing is wrong. This is actually a "feature" of Windows XP. After a time, most unused icons in the system tray will be hidden. You will notice that just to the left of the system tray is a small button. Click the button, and the tray will expand again.
What is cclener?
I assume you mean CCLEANER (aka crap cleaner).From the website"CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner." http://www.ccleaner.com/Theres not much to add really. It attempts to optimise your computer by removing temporary files and looking for unused or erroneous entries in the registration database on a Microsoft Windows operating system PC.Chris Neary Bsc hons FdSc
