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Data compression, difference between lossy and lossless compression, run-length encoding

Quiz by Hajnalka Torma

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10 questions
Show answers
  • Q1
    What is the difference between lossy and lossless compression?
    Lossy compression removes non-essential data from a file, while lossless compression reduces file size without losing any data.
    Lossless compression compresses data more efficiently than lossy compression.
    Lossy compression reduces file size without losing any data, while lossless compression removes non-essential data from a file.
    Lossless compression reduces file size without losing any data, while lossy compression removes non-essential data from a file.
    30s
  • Q2
    What is run-length encoding (RLE)?
    Run-length encoding is a process that converts lossless data to lossy data.
    Run-length encoding is a technique to encode data using encryption algorithms.
    Run-length encoding is a simple form of data compression where consecutive identical elements are replaced with a count and a single instance of the element.
    30s
  • Q3
    Which of the following is a characteristic of lossless compression?
    Lossless compression is primarily used for multimedia files.
    Lossless compression reduces the file size by removing non-essential data.
    Lossless compression compresses data more efficiently than lossy compression.
    Lossless compression sacrifices some data to achieve greater compression.
    Lossless compression preserves all the original data.
    30s
  • Q4
    What is the main advantage of lossy compression over lossless compression?
    Lossy compression achieves higher levels of compression.
    Lossy compression preserves all the original data.
    Lossy compression is a newer technology compared to lossless compression.
    Lossy compression is easier to implement.
    30s
  • Q5
    What is the purpose of data compression?
    To increase file size or transmission time.
    To convert lossy data to lossless data.
    To preserve the original data structure.
    To reduce file size or transmission time.
    To encrypt data for secure storage.
    30s
  • Q6
    What is one disadvantage of lossy compression?
    Loss of file integrity.
    Loss of data quality.
    Increased file size.
    Slower compression speed.
    Incompatibility with multimedia files.
    30s
  • Q7
    Which of the following is an example of lossless compression?
    MP3 compression
    MPEG compression
    ZIP compression
    JPEG compression
    GIF compression
    30s
  • Q8
    Which of the following is an example of lossy compression?
    GIF image compression
    ZIP file compression
    PNG image compression
    RAR file compression
    JPEG image compression
    30s
  • Q9
    Which of the following is a characteristic of lossless compression?
    Data is permanently removed during compression, but can be recovered during decompression.
    Data is randomly rearranged during compression and decompression.
    Data is permanently removed during compression and cannot be recovered during decompression.
    Data is temporarily removed during compression and recovered during decompression.
    No data is permanently removed during compression and decompression.
    30s
  • Q10
    What is a common application of lossless compression?
    Encoding audio files for streaming purposes.
    Archiving and compressing text files.
    Encrypting sensitive data for secure transmission.
    Compressing video files for efficient storage.
    Reducing the file size of high-resolution images.
    30s

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