Recall & Review
beginner
What is data compression?
Data compression is the process of making data use less space by encoding it in a smaller form. It helps save storage and speeds up data transfer.
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beginner
Name two main types of data compression.
The two main types are lossless compression, which keeps all original data, and lossy compression, which removes some data to save more space.
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intermediate
Why is lossless compression important in SCADA systems?
Lossless compression is important because SCADA systems need exact data for control and monitoring. No data can be lost or changed.
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beginner
Give an example of a lossless compression algorithm.
An example is ZIP compression, which reduces file size without losing any data.
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intermediate
What is a trade-off when using lossy compression?
The trade-off is that you get smaller files but lose some data quality, which might not be acceptable for critical systems.
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Which type of compression keeps all original data intact?
✗ Incorrect
Lossless compression keeps all original data without any loss.
Why is lossy compression usually not used in SCADA systems?
✗ Incorrect
Lossy compression loses some data, which can cause errors in SCADA systems that need exact data.
Which of these is a common lossless compression format?
✗ Incorrect
ZIP is a common lossless compression format.
What is the main benefit of data compression?
✗ Incorrect
Data compression saves storage space and speeds up data transfer.
Which compression type is best when exact data recovery is needed?
✗ Incorrect
Lossless compression allows exact data recovery.
Explain the difference between lossless and lossy data compression.
Think about whether data can be perfectly restored or not.
You got /4 concepts.
Why is lossless compression preferred in SCADA systems?
Consider the importance of data accuracy in control systems.
You got /3 concepts.