e/computer-science/aqa/questions","basePath":"/gcse/computer-science/aqa/units-of-information/questions","formulaUrl":null,"initialIndex":18,"initialQuestionWindow":[{"id":"c45c4d2e-2b27-4f72-9c07-67445fc77aa0","revisionId":"e928938c-3051-4fb0-aa43-eb1596b520a7","questionNumber":null,"questionType":"LA","specification":"A high-speed sensor captures a telemetry dataset of size 54 000 000 000 bits.","difficulty":4,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"0cf631b0-b3ab-4cd2-b5f5-3c9fa59e2561","label":null,"content":"Convert this dataset size to gigabytes (GB), assuming base-10 (decimal) prefixes.\n\nYou should show your working.","markscheme":"- Divides the number of bits by 8 to convert to bytes: $54\\,000\\,000\\,000 \\div 8 = 6\\,750\\,000\\,000$ bytes M1\n- Divides the number of bytes by $1\\,000\\,000\\,000$ (or $10^9$) to obtain $6.75$ GB A1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"d68441bc-0938-4e48-b58c-ba8cf2383299","revisionId":"58e2b1bc-653c-4556-987e-59773b6c0209","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"61ab6e63-4a84-4315-bdb4-c03a97614be7","label":null,"content":"A high-fidelity digital audio sample has a file size of 3.5 Megabytes (MB).\n\nDetermine the total number of bits in this audio file.\n\nAssume 1 Megabyte (MB) = 1,000,000 bytes.\n\nYou should show your working.","markscheme":"- Converts Megabytes to bytes, calculating $3.5 \\times 1,000,000 = 3,500,000$ bytes (or $3.5 \\times 1,024 \\times 1,024 = 3,670,016$ bytes) M1\n- Converts bytes to bits, calculating $3,500,000 \\times 8 = 28,000,000$ bits (or $3,670,016 \\times 8 = 29,360,128$ bits) A1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"d919c76a-bcec-4980-8727-5c18d31164e8","revisionId":"f63a4901-3cf6-48aa-8c7e-2960fa65c485","questionNumber":null,"questionType":"LA","specification":"","difficulty":5,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"b96bf0ec-addf-4d48-af62-23d977d02469","label":null,"content":"Calculate the number of **bits** in $12.5\\text{ MiB}$ (mebibytes).\n\nShow your working.","markscheme":"- Shows conversion from mebibytes (MiB) to bytes by multiplying by $1024^2$ (or $2^{20}$):\n $$12.5 \\times 1,048,576 = 13,107,200\\text{ bytes}$$ M1\n- Converts bytes to bits by multiplying by $8$:\n $$13,107,200 \\times 8 = 104,857,600\\text{ bits}$$\n *(Alternatively, $12.5 \\times 2^{20} \\times 2^3 = 12.5 \\times 8 \\times 2^{20} = 100 \\times 2^{20} = 104,857,600\\text{ bits}$)* 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","difficul

Units of information

Question 17

Units of information Questions

Units of information

Question 17

Units of information Questions