Data compression (Edexcel GCSE Computer Science): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the main goal of data compression?
What is the main goal of data compression?
To reduce file sizes
Why is compression practically impossible to avoid for daily internet content?
Why is compression practically impossible to avoid for daily internet content?
Massive file sizes make it necessary
What happens when you uncompress a losslessly compressed file?
What happens when you uncompress a losslessly compressed file?
You get exactly the original
How does lossless compression reduce file size?
How does lossless compression reduce file size?
Finds patterns and redundancy
Which is an example of a lossless file format?
Which is an example of a lossless file format?
PNG
What type of file should always use lossless compression?
What type of file should always use lossless compression?
Text documents
What is a key feature of lossy compression?
What is a key feature of lossy compression?
Data is permanently removed
How does lossy compression reduce audio file size?
How does lossy compression reduce audio file size?
Removes sounds ears can't detect
Which format uses lossy compression?
Which format uses lossy compression?
MP3
How much smaller is an MP3 file compared to uncompressed audio?
How much smaller is an MP3 file compared to uncompressed audio?
One-tenth the size
What storage benefit does compression provide?
What storage benefit does compression provide?
Cloud storage costs less
Which compression type should be used for program files?
Which compression type should be used for program files?
Lossless - cannot lose any data