Unit 3 Data Representation 0.0 / 5 ? ComputingRepresenting dataGCSEAQA Created by: mdampareCreated on: 21-11-23 12:37 Binary and Hexadecimal Topic 1 1 of 19 Which numbers are stored in one bit? 0 + 1 2 of 19 How many bits are there in a nibble and a byte? Nibble = 4 bits, byte = 8 bits 3 of 19 What are the units after a kilobyte? megabyte, gigabyte, terabyte 4 of 19 What is zero as an 8 bit binary number? 0000 0000 5 of 19 What is 255 in binary? 1111 1111 6 of 19 What is 39 as an 8 bit binary number? 0010 0111 7 of 19 Images Topic 2 8 of 19 What are some image file formats? PNG, JPG, GIF, BMP, TIFF 9 of 19 What is image resolution? The concentration of pixels within a specific area 10 of 19 Changing the colour dept of an image will... affect the number of colours it can display 11 of 19 Sound Topic 3 12 of 19 Difference between analogue and digital signals? Analogue sound signals are continuous, digital signals are discrete 13 of 19 What is sound sampling? The number of samples taken per second, in Hertz (Hz) 14 of 19 Formula for file size (bits)? sampling rate x resolution x duration 15 of 19 What is lossless compression? Formats able to reduce file size but don't lose any information. 16 of 19 What is lossy compression? Removes sound that we can't hear easily 17 of 19 Compression Topic 4 18 of 19 What is compression? Algorithms which reduce size 19 of 19
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