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Data Compression and Data Retrieval Practice Test
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Data compression techniques help in reducing data size for effective storage. The compression is done by a program that uses a formula or algorithm to determine how to shrink the size of the data.   Compressing data can be a 1. lossless or2.  lossy process. Lossless compression enables the restoration of a file to its original state, without the loss of a single bit of data, when the file is uncompressed. Lossy compression permanently eliminates bits of data that are redundant, unimportant or imperceptible. Lossy compression is useful with graphics, audio, video and images, where the... Show more
Data Compression and Data Retrieval Practice Test
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25 Questions

1. What is the correct syntax of the declaration which defines the xml version?
2. RLE Is Designed Especially For Data With
3. Advantages of data compression
4. The Attribute Used To Define A New Namespace Is
5. Hashing gives each item
6. Lossy or lossless? Used for web images as it gives the smallest file size - this makes images easier to upload/download/share.
7. Example of dictionary based compression is
8. Example of entropy based compression is
9. Which of these is an advantage for Lossy compression?
10. A compression technique consists of two basic components such as
11. The idea with wavelets is to represent a complicated function by
12. Entropy coding can be used for compression of any type of data in a
13. Huffman coding is constructed in such a way that no ___constructed code are prefixes to each other.
14. Composite source model, which can be viewed as a
15. In LZ77 encoding process one reference (a triple) is transmitted for several input symbols and hence it is
16. The xml dom object is
17. In a typical picture, most pixels will be
18. GIF has become quite popular for encoding all kinds of images, both computerngenerated and “___” images.
19. Models for certain telemetry data can also be obtained through ____of the underlying process.
20. Identify types of lossless compression
21. Arithmetic algorithms as well as huffman algorithms are based on
22. LZW would only send the _____to the dictionary
23. Shannon Defined A Quantity Called
24. Compressed image can be recovered back by
25. Lossy or lossless? This type of compression does not get rid of any data

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