Discussion
An example of a dictionary-based coding technique is
Answer: D
LZW coding is a dictionary based coding technique: it builds a dictionary of strings as it reads the data, and replaces repeated strings with the codes of the dictionary entries. Run-length coding replaces runs of the same symbol, Huffman coding assigns variable length codes by symbol frequency, and predictive coding encodes the difference from a predicted value, so none of them is dictionary based. The keyed answer is LZW coding.
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