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 dataLosslessThe original file can be re-created as no data is lostLossySome 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: -Utility software helps maintain the system. Utility software includes: encryption software. defragmentation software.
Detailed explanation-2: -Utility software helps users configure, analyse, optimise and maintain a computer. This software normally consists of small programs which are thought of as part of the operating system (OS) as they often come built in with the OS.
Detailed explanation-3: -Disk Defragmenter is a Windows utility program that located and eliminates unnecessary fragments and rearranges files and unused to disk space to optimise operations.
Detailed explanation-4: -Typical utilities include such programs as shells, text editors, compilers, and (sometimes) the file system. A shell is a program which serves as the primary interface between the user and the operating system.