COMPUTER SCIENCE AND ENGINEERING
SYSTEM SOFTWARE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Turning the text into a format that only a reader with a key can decrypt it
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When some original data is lost and the original file cannot be re-created
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Usually performed on text
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The original file can be re-created from the compressed file
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Detailed explanation-1: -After lossless compression, a file can be restored to its original form. Quality suffers as a result of lossy compression. It leads to some level of data loss. No quality degradation happens in lossless compression.
Detailed explanation-2: -With lossless compression the file data is restored and rebuilt in its original form after decompression, enabling the image to take up less space without any discernible loss in picture quality. No data is lost and as the process can be reversed, it’s also known as reversible compression.
Detailed explanation-3: -Lossless compression “packs” data into a smaller file size by using a kind of internal shorthand to signify redundant data. If an original file is 1.5 MB, for example, lossless compression can reduce it to about half that size, depending on the type of file being compressed.
Detailed explanation-4: -Lossless compression is fully reversible, meaning the original file can be recreated bit for bit. Lossless compression throws away unimportant details that a human being will likely be unable to detect. Lossy compression is only possible on files that are at least one gigabyte in size before compression.