AQA Paper 2 - Fundamentals of data representation 0.0 / 5 ? ComputingData structuresA2/A-levelAQA Created by: The_Pimp_DaddyCreated on: 08-09-22 09:46 What is a natural number? Integers 1 of 24 What is a rational number? A float value 2 of 24 What is an irrational number? A number that cannot be represented by integers or fractions 3 of 24 What is a real number? Positive or negative integers, fractions or decimals 4 of 24 What is an ordinal number? Numbers that use letters to represent a place (1st etc) 5 of 24 What is a number base? The possible numbers/letters a character can be 6 of 24 How big is a byte in bits? 8 7 of 24 How big is one KibiByte? 2^10 B 8 of 24 How big is one KiloByte? 10^3 B 9 of 24 What is unsigned binary? Binary without a sign bit at the start 10 of 24 What is signed binary? Binary with a sign bit at the start 11 of 24 What is two's compliment? Making the first bit negative in a binary number 12 of 24 What is Unicode? A system for encoding characters from different cultures 13 of 24 What is a parity bit? A bit that checks if the 7 bits before it are odd or even 14 of 24 What is majority voting? Where each bit is sent three times and the majority bit will be taken 15 of 24 What is a checksum? Where input is fed through an algorithm to get a quantifiable result to verify integrity 16 of 24 What is a check digit? A digit used to verify the correct scanning of a barcode 17 of 24 What is the resolution of an image? The pixels in an image 18 of 24 What is the size of an image calculated by? Resolution x Colour Depth 19 of 24 What is metadata? Extra data on an image that gives more information 20 of 24 What is the advantage of vector graphics? Infinitely Scalable 21 of 24 How do you calculate sound bit rate? bit depth * sample rate 22 of 24 How do you calculate the size of a sound file? bit rate * length 23 of 24 What is Run Length Encoding (RLE)? Use of numbers next to letters to represent repeated characters 24 of 24
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