Many large data files are compressed to make Internet transmission more efficient. Which of the following statements is true about the lossless and lossy data compression techniques? 14. l. Lossless data compression techniques will reduce the number of bits that are actually transmitted, but after transmission every bit of the original data file can be restored. II. Lossy data compression techniques will reduce the number of bits that are actually transmitted, but after transmission every bit of the original data file can be restored. 111. Data compression does allow efficient Internet transmission of data, but it will always permanently reduce the data file, which can result in a quality loss of the video and audio data. (A) I only (B) 11 only (C) 111 only (D) 11 only
Question
Many large data files are compressed to make Internet transmission more efficient. Which of the following statements is true about the lossless and lossy data compression techniques? 14. l. Lossless data compression techniques will reduce the number of bits that are actually transmitted, but after transmission every bit of the original data file can be restored. II. Lossy data compression techniques will reduce the number of bits that are actually transmitted, but after transmission every bit of the original data file can be restored. 111. Data compression does allow efficient Internet transmission of data, but it will always permanently reduce the data file, which can result in a quality loss of the video and audio data. (A) I only (B) 11 only (C) 111 only (D) 11 only
Solution
The correct answer is (A) I only.
This is because lossless data compression techniques do indeed reduce the number of bits that are transmitted, but they also allow for every bit of the original data file to be restored. This is not the case with lossy data compression techniques, which do reduce the number of bits transmitted, but do not allow for every bit of the original data file to be restored. Therefore, statement II is not true.
Statement III is partially true - data compression does allow for more efficient Internet transmission of data, but it does not always permanently reduce the data file. This is only the case with lossy data compression, not lossless. Therefore, statement III is not entirely true.
So, the correct answer is (A) I only.
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