e/computer-science/aqa/questions","basePath":"/gcse/computer-science/aqa/units-of-information/questions","formulaUrl":null,"initialIndex":9,"initialQuestionWindow":[{"id":"256698b8-fb9a-4ec9-b1fd-111194996db4","revisionId":"fdc78cfb-dfce-4225-a73f-76629d2cc1f0","questionNumber":null,"questionType":"LA","specification":"Sarah purchases an 8GB USB flash drive to transfer files between her home and school computers.","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"c62e1254-7cf7-4f50-9554-812a7a21160d","label":null,"content":"Calculate how many megabytes (MB) there are in 8GB. Show your working.","markscheme":"- Shows correct working by multiplying $8$ by either $1000$ or $1024$ (e.g. $8 \\times 1000$ or $8 \\times 1024$) M1\n- Obtains the correct result: $8,000$ or $8,192$ (MB) A1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"470b1f0f-5a97-4f68-8c25-95fb3141d2f7","revisionId":"6cede429-4314-40d0-a1c4-f20dc3b277e1","questionNumber":null,"questionType":"LA","specification":"A digital temperature sensor generates a daily diagnostic payload that is exactly 12 kilobytes in size.","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"d45bf706-a3a7-4af9-9387-a8b064a5fd83","label":null,"content":"Determine the number of bits contained within this diagnostic payload. Show your working.","markscheme":"- Shows a correct method of calculation, either converting kilobytes to bytes first and then to bits, or directly multiplying: $12 \\times 1000 \\times 8$ or $12 \\times 1024 \\times 8$ M1\n- Obtains a correct final answer of $96,000$ (using $1,000$ bytes per kilobyte) or $98,304$ (using $1,024$ bytes per kilobyte) A1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"51c64a6f-a8e5-40eb-9b47-c8699bfe3f52","revisionId":"df5706b3-5f04-422e-b813-db639e0b40b5","questionNumber":null,"questionType":"LA","specification":"A digital audio recording has a file size of 2.5 MB.","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"f37e2881-e51a-4b03-acf6-1a4b86a45b66","label":null,"content":"Calculate the number of bits in this file.\n\nAssume 1 megabyte (MB) = 1,000,000 bytes.\n\nYou should show your working.","markscheme":"- Correctly converts megabytes to bytes, e.g. $2.5 \\times 1,000,000 = 2,500,000$ (or $2.5 \\times 1,024 \\times 1,024 = 2,621,440$) M1\n- Multiplies the number of bytes by $8$ to obtain $20,000,000$ bits (or $20,971,520$ bits) A1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null}],"subjectCode":"gcse_computer_science__aqa","summaries":[{"id":"006415ef-2912-4124-b619-c14a37610bbb","difficultyBand":"easy","calculatorUse":null},{"id":"00bc1718-3878-43d5-b653-89ed044b1a2c","difficultyBand":"easy","calculatorUse":null},{"id":"0642702e-8c1e-49fa-bb9b-5ec0e78f5c73","difficultyBand":"easy","calculatorUse":null},{"id":"08d13fb1-c4b7-4af8-bcf6-914564d09813","difficultyBand":"easy","calculatorUse":null},{"id":"0ad7c20c-f245-43ae-81e2-b7ecf5545d34","difficultyBand":"easy","calculatorUse":null},{"id":"105192ad-0724-4ee1-b7a8-e62ea18f04e4","difficultyBand":"easy","calculatorUse":null},{"id":"14c24c73-f5c3-4e39-8ee7-bebc5c2bbf99","difficultyBand":"medium","calculatorUse":null},{"id":"1673e8c0-5e84-4a48-be24-2763b64e67be","difficultyBand":"easy","calculatorUse":null},{"id":"256698b8-fb9a-4ec9-b1fd-111194996db4","difficultyBand":"easy","calculatorUse":null},{"id":"470b1f0f-5a97-4f68-8c25-95fb3141d2f7","difficultyBand":"easy","calculatorUse":null},{"id":"51c64a6f-a8e5-40eb-9b47-c8699bfe3f52","difficultyBand":"easy","calculatorUse":null},{"id":"71918bc9-0850-4c17-a891-235dfab1fc02","difficultyBand":"easy","calc

Units of information

Question 9

Units of information Questions

Units of information

Question 9

Units of information Questions