e/computer-science/aqa/questions","basePath":"/gcse/computer-science/aqa/units-of-information/questions","formulaUrl":null,"initialIndex":11,"initialQuestionWindow":[{"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},{"id":"71918bc9-0850-4c17-a891-235dfab1fc02","revisionId":"7ed7d148-82cc-4b27-a841-0c93b634e753","questionNumber":null,"questionType":"LA","specification":"An environmental monitoring buoy records oceanic telemetry and has a local storage capacity of 0.125 Terabytes (TB).","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"9ca8b4f2-79ff-4c34-a9e3-6b51c831efeb","label":null,"content":"Calculate the equivalent capacity in Megabytes (MB). Show your working.","markscheme":"- Shows correct multiplication of $0.125$ by $1,000^2$ (or $1,000,000$) for the decimal system, or by $1,024^2$ (or $1,048,576$ or $2^{20}$) for the binary system M1\n- Obtains $125,000$ (MB) for the decimal calculation, or $131,072$ (MB) for the binary calculation A1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"87eeca23-eb4f-4fea-86d4-f911ee3252fa","revisionId":"2f213006-7efa-4fff-8a73-e2f6a0a851dd","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"416aebc8-96f9-4d02-936d-c3f730fcb80e","label":null,"content":"How many bits are there in four kilobytes?\n\nShow your working.","markscheme":"- Shows a correct method of calculation, e.g. $4 \\times 1000 \\times 8$ or $4 \\times 1024 \\times 8$ (or converts to $4000$ or $4096$ bytes and multiplies by $8$) M1\n- States the correct final answer: $32,000$ or $32,768$ 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","calculatorUse":null},{"id":"87eeca23-eb4f-4fea-86d4-f911ee3252fa","difficultyBand":"easy","calculatorUse":n

Units of information

Question 11

Units of information Questions

Units of information

Question 11

Units of information Questions