What is Huffman coding used for?, Image editing, Data compression, Error checking, Encryption, Huffman coding is mainly what type of compression?, Lossless, Encrypted, Lossy, Analog, Huffman coding uses what kind of code lengths?, Random length, Fixed length, Variable length, Equal length, Huffman coding assigns shortest codes to symbols with what frequency?, Unknown, Zero, Lowest, Highest, What structure is built to create Huffman codes?, Matrix, Binary tree, Queue, Hash table, In Huffman coding, leaves of the tree represent what?, Parity bits, Edges, Frequencies, Symbols, What do internal nodes store in Huffman coding?, Combined frequency, Pixel data, ASCII value, Character codes, Which two nodes are combined first?, Random nodes, Root nodes, Lowest frequencies, Highest frequencies, What is used to repeatedly pick smallest frequencies efficiently?, Array, Stack, Priority queue, Register, A Huffman code is a type of what code?, Caesar code, Gray code, Block code, Prefix code, Prefix-free means what?, Uses checksum, No code is prefix, Codes are hidden, All codes same, Why is prefix-free important?, Unambiguous decoding, More encryption, Better graphics, Faster internet, In a Huffman tree, left edge is often labelled as what?, 2, 0, A, 1, In a Huffman tree, right edge is often labelled as what?, B, 0, 1, 2, What do you get by reading bits from root to leaf?, Symbol code, Parity bit, Frequency list, File header, What information is needed to decode Huffman data?, CPU speed, IP address, Screen size, Code table, What usually happens to common symbols in Huffman coding?, Longer codes, Shorter codes, Encrypted, Removed, What usually happens to rare symbols in Huffman coding?, Ignored, Duplicated, Shorter codes, Longer codes, Huffman coding works best when symbol frequencies are what?, Uneven, Unknown, Equal, Zero, What is one disadvantage of Huffman coding?, Needs GPU, Data loss, Tree overhead, Needs internet.

Huffman Coding (OCR GCSE Computing)

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