er-science/aqa/number-bases/questions","formulaUrl":null,"initialIndex":11,"initialQuestionWindow":[{"id":"403f2cd3-e85f-40a9-aeed-238812381c6f","revisionId":"609fba90-67bf-4545-bdc8-ee1858a3546c","questionNumber":null,"questionType":"LA","specification":"An analog-to-digital converter inside a high-fidelity pressure sensor represents data using an unsigned binary format. The maximum possible decimal reading that can be represented by this system is 4095.","difficulty":4,"difficultyBand":"easy","totalMarks":1,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"7cc7bdb3-656c-46b9-94be-ebb68490ddaf","label":null,"content":"Determine the number of bits used by the converter.","markscheme":"- Sets up the equation $2^n - 1 = 4095$, leading to $2^n = 4096$, and solves to find $n = 12$ B1","marks":1,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"41127df3-45de-40c9-8e63-f18a96e8acc2","revisionId":"85a6e16b-4dbe-4ba6-a5cc-bff7e9b0eea7","questionNumber":null,"questionType":"MC","specification":"The number base 2 is called binary.\n\nSelect one option to show which number base is called denary.","difficulty":1,"difficultyBand":"easy","totalMarks":1,"sourceTitle":null,"calculatorUse":null,"parts":[],"options":[{"id":"bd3b2055-8ea4-4660-b92a-8f706fe38f29","content":"$$2$","correct":false,"markscheme":"This is incorrect because base 2 is called binary.","order":0},{"id":"3023169d-4945-4619-9535-d8fbe87974fe","content":"$$8$","correct":false,"markscheme":"This is incorrect because base 8 is called octal.","order":1},{"id":"a5478429-7cf7-497c-bc2f-5ab69abd09a9","content":"$$10$","correct":true,"markscheme":"This is correct because base 10 is the denary (decimal) system.","order":2},{"id":"792da6b6-5902-4a71-ae51-7a13c6500c43","content":"$$16$","correct":false,"markscheme":"This is incorrect because base 16 is called hexadecimal.","order":3}],"explanation":null,"firstAttemptFullMarks":null},{"id":"4386f5d0-145a-4618-ab28-4c574009a4e5","revisionId":"ca584ec2-bb55-4acb-b432-c9aab3a38ddf","questionNumber":null,"questionType":"LA","specification":"A web developer is designing a style sheet and decides to define the 24-bit RGB color values using hexadecimal format (such as `#3F51B5`) rather than writing them as equivalent 24-bit binary strings (such as `001111110101000110110101`).","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"de8e5c04-9f56-4758-802a-12987d5b3e48","label":null,"content":"State **two** advantages of representing these 24-bit values in hexadecimal rather than binary.","markscheme":"- Hexadecimal is much more concise and shorter to write (using 6 hex characters instead of 24 binary digits), saving screen space and making stylesheets easier to read B1\n- It is much easier for humans to read, interpret, memorize, and recognize patterns in different color codes B1\n- It reduces the likelihood of human transcription, typing, or copying errors compared to dealing with a long sequence of 0s and 1s B1\n- It is very simple to map or convert directly to and from binary because each hexadecimal digit corresponds to exactly 4 bits (a nibble) B1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null}],"subjectCode":"gcse_computer_science__aqa","summaries":[{"id":"0ca5d0db-a4fe-474f-94e0-c673d688f346","difficultyBand":"medium","calculatorUse":null},{"id":"176548db-ed1a-4a41-822f-13ad8d9476c6","difficultyBand":"easy","calculatorUse":null},{"id":"17f40824-cf81-4f2a-be4e-c7752433783e","difficultyBand":"easy","calculatorUse":null},{"id":"1c63c54d-7080-4c8f-901a-cb2fc6a01d8e","difficultyBand":"easy","calculatorUse":null},{"id":"2273abed-07b4-4f11-90c5-11e308977e87","difficultyBand":"easy","calculatorUse":null},{"id":"290441a6-11e6-48ab-8cbb-5ee1959027c3","difficultyBand":"easy","calculatorUse":null},{"id":"2e422d70-c69e-4a73-acd9-59548add32

Number bases

Question 9

Number bases Questions

Number bases

Question 9

Number bases Questions