COMPUTER SCIENCE AND ENGINEERING
SYSTEM SOFTWARE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Usually performed on video files
|
|
|
When some original data is lost and the original file cannot be re-created
|
|
|
The original file can be re-created from the compressed file
|
|
|
Turning the text into a format that only a reader with a key can decrypt it
|
Detailed explanation-1: -Lossless compression can reduce files without loss of information in the process. The original file can be recreated exactly when uncompressed. This is important for the data uncompressed.
Detailed explanation-2: -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-3: -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-4: -Lossless compression uses an algorithm to shrink the image without losing any important data. Essentially, it rewrites the file to make it more efficient-resulting in a smaller storage or transfer size. One way the algorithm does this is by replacing non-essential information and storing them in an index file.
Detailed explanation-5: -4.1 Loss and Lossless Compression and Decompression. Lossless compression is a compression technique that does not lose any data in the compression process. Lossless compression “packs” data into a smaller file size by using a kind of internal shorthand to signify redundant data.