Compression: Crash Course Computer Science

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Information Technology (IT), Architecture
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11th Grade - University
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Easy
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is compression important for file storage and transmission?
It reduces file size for easier storage and faster transmission.
It makes files more complex.
It changes the file format.
It increases the file size.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary goal of run-length encoding?
To add more metadata to files.
To change the color of pixels.
To reduce redundant data by encoding runs of identical values.
To increase the number of bytes.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does Huffman coding achieve compression?
By replacing frequent data blocks with longer codes.
By using a fixed-length code for all data blocks.
By adding extra bytes to the data.
By using a frequency-sorted tree to generate efficient codes.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a key characteristic of lossless compression?
It is not suitable for text files.
It only works with audio files.
It allows for perfect reconstruction of the original data.
It permanently removes some data.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is perceptual coding in audio compression?
Encoding all frequencies at the same precision.
Increasing the file size for better quality.
Discarding or reducing precision based on human perception.
Removing all low-frequency sounds.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why are MP3 files significantly smaller than uncompressed audio files?
They are stored in a different file format.
They discard data that is less important to human perception.
They use lossless compression techniques.
They add more data to improve quality.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does JPEG compression reduce file size?
By converting images to grayscale.
By enhancing color variations.
By discarding high-frequency spatial data that humans don't perceive well.
By increasing the number of pixels.
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