COMPUTER SCIENCE AND ENGINEERING
SYSTEM SOFTWARE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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To scramble data in a way that it is unreadable to anybody who doesn’t have a key to be able to unscramble this.Data is “scrambled” using a key and then decrypted using a keyData is is unreadable if anyone is to intercept it
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When a hard disk drive is new-files get added onto the disk in order-very much like starting with a blank piece of paper and adding to itAs files are deleted-this leaves gapsWhen new files are saved-the files fill the gaps and become fragmentedThis software groups files back together
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Reducing the size of the file by performing an algorithm on the original dataLossless-The original file can be re-created as no data is lostLossy-Some of the original data is lost and the original file can not be re-created
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None of the above
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Detailed explanation-1: -Compression software reduces the size of a file stored on secondary storage.
Detailed explanation-2: -WinZip is a popular Windows program that compresses files when it packages them in an archive.
Detailed explanation-3: -A disk defragmenter is a utility that reorganizes the files and unused space on a computer’s hard disk so that the operating system accesses data more quickly and programs run faster. It attempts to place data in sectors that are contiguous (next to each other) when possible, a process known as defragmenting.
Detailed explanation-4: -Microsoft Drive Optimizer (formerly Disk Defragmenter) is a utility in Microsoft Windows designed to increase data access speed by rearranging files stored on a disk to occupy contiguous storage locations, a technique called defragmentation.