Data Storage And Compression
Bayani Gaba-gaba
A phone with 128 gibibytes of storage fills up faster than the number on the box suggests, and a photo saved as a JPEG is a fraction of the size of the same photo saved as a bitmap. Neither of these is a coincidence. They come from two ideas that sit behind almost everything a computer stores: the units used to measure data, and the algorithms used to shrink it.
In this lesson you will learn how to convert between binary and denary multiples of a byte, why files are compressed and the difference between doing so losslessly and lossily, how the run-length encoding algorithm compresses repetitive data, and how to calculate the storage a file will need before it is saved.
Manufura
- Understand how to use and convert between binary and denary multiples (bit, nibble, byte, kibibyte, mebibyte, gibibyte, tebibyte, kilobyte, megabyte, gigabyte, terabyte)
- Understand the need for data compression and methods of compressing data (lossless, lossy), and that JPEG and MP3 are examples of lossy algorithms
- Understand how a lossless, run-length encoding (RLE) algorithm works
- Understand that file storage is measured in bytes and be able to calculate file sizes
Takardar Darasi
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Nazarin Darasi
Barka da kammala darasi akan Data Storage And Compression. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- How many bits are there in 1 nibble? A) 2 B) 4 C) 8 D) 16 Answer: B
- Which of these is the correct value of 1 mebibyte? A) 1,000,000 bytes B) 1,024 bytes C) 1,048,576 bytes D) 1,000 bytes Answer: C
- Which compression method discards data that cannot be recovered? A) Lossless B) Lossy C) Run-length encoding D) Archiving Answer: B
- A string contains the run WWWWWBBB (5 Ws then 3 Bs). What is the run-length encoded output? A) WWWWWBBB B) 5W3B C) W5B3 D) 8WB Answer: B
- Which file format is named by the Edexcel specification as an example of lossy compression? A) ZIP B) PNG C) JPEG D) TXT Answer: C
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
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Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Data Storage And Compression? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
