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- 1. Multiple ChoiceWhat is compression?To convert one file to anotherTo reduce the size of data to save spaceTo minimise the time taken for a file to be downloadTo compress something by pressing it hard
- 2. Multiple ChoiceWhat does Lossy Compression do to files?Increases the file size and keeps the same qualityEliminates no information at allDecreases the file size and keeps the same qualityEliminates unnecessary information in a file to reduce file size
- 3. Multiple ChoiceWhat is Lossless Compression?No information is lost but file size is increasedThere is no loss of information at all after compressionFiles which have the exact same data after compressionCompression involves an algorithm
- 4. Multiple ChoiceWhat type of compression does the ZIP format use?LossyLossless
- 5. Multiple ChoiceWhat type of compression would you use to compress a video?LossyLossless
- 6. Multiple ChoiceWhat type of compression would you use to compress a text file?LossyLossless
- 7. Multiple ChoiceWhen Lossy compression is used data is lost?TrueFalse
- 8. Multiple ChoiceWhich of the following are not in a compressed format?JPEGMPEGBitmapMP3
- 9. Multiple ChoiceJPEG stands for...Joint Photo Exempted GradeJoint Photographic Experts GroupJunior Photographic Export Group
- 10. Multiple Choice
True or False? Compression reduces the size of a file to make it smaller
True
False
- 11. Multiple Choice
Lossy or lossless? This type of compression makes the file smaller
Lossy
Lossless
Both
- 12. Multiple Choice
Lossy or lossless? This type of compression gets rid of some information
Lossy
Lossless
Both
- 13. Multiple Choice
Lossy or lossless? All information and quality is kept
Lossy
Lossless
Both
- 14. Multiple Choice
Lossy or lossless? Some quality is lost
Lossy
Lossless
Both
- 15. Multiple Choice
Lossy or lossless? Used for web images as it gives the smallest file size - this makes images easier to upload/download/share.
Lossy
Lossless
Both
- 16. Multiple Choice
Lossy or lossless? The file size is reduced by making the whole file smaller
Lossy
Lossless
Both
- 17. Multiple Choice
MP3 is a lossless file format for sound. True or False?
TRUE
FALSE
- 18. Multiple Choice
What image file format are used for short animations
PNG
RAW
TIFF
GIF
- 19. Multiple Choice
Does A GIF use Lossless or lossy compression
Lossless
Lossy
- 20. Multiple ChoiceWhat is compression?To convert one file to anotherTo reduce the size of data to save spaceTo minimize the time taken for a file to be downloadedTo compress something by pressing it very hard
- 21. Multiple ChoiceWhat would you use compression for?Making an image file smallerModifying an image
- 22. Multiple ChoiceWhich best describes Lossless Compression?No information is lost but file size is increasedThere is no loss in information at all after compressionFiles which have the exact same data after compressionCompression that involves an algorithm
- 23. Multiple ChoiceMakes the file smaller by giving repeated patterns/colours a specific codeLossy CompressionLossless Compression
- 24. Multiple ChoiceA set of instructions for the computer to followAlgorithmIteration
- 25. Multiple ChoiceWhich of these is an advantage for Lossy compression?The file size becomes significantly (much) smallerThe file size does not become much smaller than 50%
- 26. Multiple ChoiceWhat would you use compression for?Making an image file smallerModifying an image
- 27. Multiple Choice
Compression in general makes it _______ to send, upload and stream data
Quicker
Slower
- 28. Multiple Choice
Lossless compression permanently deletes the data
True
False
- 29. Multiple Choice
Compression looks for _______ data
Unnecessary
Repeated
- 30. Multiple Choice
There are _____ different types of compression
2
3
4
- 31. Multiple Choice
Why is it necessary to compress files?
File compression enables data to be transferred quickly.
Disk space needed on internet servers is reduced. This allows the servers to store more files / information with less disk space.
File compression is a process to reduce the disk space to store that file.
File compression is a mandatory preference for some of the internet servers to transfer files.
- 32. Multiple Choice
Which is bigger?
MB (Megabyte)
TB (Terabyte)
GB (Gigabyte)
KB (Kilobyte)
- 33. Multiple Choice
What does a .wav file save?
Sound
Video
Picture
Sound & Video
- 34. Multiple Choice
What is compression?
To convert one file to another
To reduce the size of data to save space
To minimise the time taken for a file to be downloaded
To compress something by pressing it very hard
- 35. Multiple Choice
What does Lossy compression do to files?
Increases the file size and keeps the same quality
Eliminates no information at all
Decreases the file size and keeps the same quality
Eliminates unnecessary information in a file to reduce file size
- 36. Multiple Choice
What is lossless compression?
No information is lost but file size is increased
There is no loss in information at all after compression
Files which have the exact same data after compression
Compression that involves an algorithm
- 37. Multiple Choice
What type of compression would you use to compress a video?
Lossy
Lossless
- 38. Multiple Choice
What type of compression would you use to compress a text file?
Lossy
Lossless
- 39. Multiple Choice
Milan took a photograph with her high resolution digital camera. Then, she emailed a copy of the picture to herself to use in a school project. When Milan downloaded the picture from her email, she noticed that it did not look as crisp and the colors were not exactly the same. Which of the following could be a possible explanation for difference in image quality?
The picture saved in the email contained fewer pixels than the original image.
The picture saved in the email contained more pixels than the original image.
The picture saved in the email was encrypted. Data encryption causes information loss.
The picture saved in the email was encrypted. Milan needs to decrypt the picture to restore the original image quality.
- 40. Multiple Choice
Which of the following is a true statement about data compression?
Data compression techniques can be used to reduce the size of a file for storage or transmission.
Data compression techniques can only be used for certain types of data.
Data compression techniques cannot be applied to files being transmitted over the Internet.
Lossy data compression should be used if there may be a need to recover all of the original data from the compressed file.
- 41. Multiple Choice
A song is digitally recorded by an artist and saved to a file. Then, the artist runs a program that takes the file as input and produces a new file. The new file does not include any sound data recorded that cannot be heard by the human ear. The artist then saves the new file over the original file. Which of the following is true about the transformation of the digitally recorded song data?
This is a lossy transformation of data that results in a smaller file size.
This is a lossy transformation of data that results in a larger file size.
This is a lossless transformation of data that results in a smaller file size.
This is a lossless transformation of data that results in a larger file size.
- 42. Multiple Choice
Which of the following is a true statement about data compression?
Data compression is only useful for files being transmitted over the Internet.
Regardless of the compression technique used, once a data file is
compressed, it cannot be restored to its original state.
Sending a compressed version of a file ensures that the contents of the file cannot be intercepted by an unauthorized user.
There are trade-offs involved in choosing a compression technique for storing and transmitting data.
- 43. Multiple Choice
While using image compression algorithms we know that jpeg is a lossy file format for image compression and png files use a lossless compression format.
A software development company is building a custom application for the government. The software will scan images of citizens of the country and store it in a database. The images can then be pulled up with other necessary information as needed.
What would be the image format that can be best suitable
for this software?
PNG
JPEG
Neither PNG or JPEG
Both PNG and JPEG
- 44. Multiple Choice
What are the main reasons to compress data? (select all that apply)
To reduce secondary storage space
To maximise the available RAM memory
To speed up network transmission times
To optimise the data
To reduce packet congestion on networks
- 45. Multiple Choice
Which of files is suitable for sound recording?
GIF
MPEG
WAV
JPEG
- 46. Multiple Choice
Which of these terms is a type of data compression?
resolution
zipping
inputting
caching
- 47. Multiple Choice
Which type of file would require more storage space?
JPEG
BMP
- 48. Multiple ChoiceCompressing files reduces transfer time.TrueFalse
- 49. Multiple ChoiceCompressed files cannot contain viruses.FalseTrue
- 50. Multiple ChoiceWhich of the following file formats is used for video?MPEGMP3BMPVIDE
- Answer choicesTagsAnswer choicesTags