er-science/aqa/number-bases/questions","formulaUrl":null,"initialIndex":15,"initialQuestionWindow":[{"id":"65da5ff4-6549-4670-a197-0f44160bfa25","revisionId":"d969c1bd-8927-463a-9aa0-20105811b71a","questionNumber":null,"questionType":"LA","specification":"An embedded systems engineer is designing a diagnostic display for a new network router. They must choose whether to display memory addresses and packet headers in binary or hexadecimal.","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"3a2ad7e5-ea3d-440f-b83f-b25a95271393","label":null,"content":"Identify the **two** statements that correctly describe the advantages of using hexadecimal instead of binary for this display.\n\n- [ ] **A**: The router's processor can parse and execute diagnostic instructions faster when they are written in hexadecimal.\n- [ ] **B**: It is easier for the engineer to recognize specific memory-address patterns and debug firmware issues when viewing hexadecimal rather than binary.\n- [ ] **C**: Storing diagnostic logs in hexadecimal format on the router's flash memory consumes significantly less physical storage space than storing them in binary.\n- [ ] **D**: Displaying hexadecimal values reduces the likelihood of human transcription errors when the engineer manually inputs system configurations.\n- [ ] **E**: A 16-bit configuration register can store a wider mathematical range of values if it is represented in hexadecimal rather than binary.\n- [ ] **F**: Hexadecimal data signals suffer less attenuation and packet corruption when transmitted over the network copper cables.","markscheme":"- Identifies **B** as a correct statement (hexadecimal representation makes complex binary sequences shorter and much easier for human engineers to read, recognize patterns, and debug) B1\n- Identifies **D** as a correct statement (shorter representations, e.g., 4 hex digits instead of 16 binary bits, drastically lower the chance of human typing or transcription errors) B1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"87398fd6-39e0-4901-99f3-7284912aa5be","revisionId":"9505c6a0-93c7-4087-bfc4-87263ba76811","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"easy","totalMarks":1,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"1353ede3-1e5c-4854-8ef4-566db4f30635","label":null,"content":"What is the largest decimal number that can be represented using 6 bits?","markscheme":"- Identifies the largest decimal number as $63$ (accept $2^6 - 1$ or $32 + 16 + 8 + 4 + 2 + 1$) B1","marks":1,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"87c8d654-75e1-4c71-a09f-709d7213465b","revisionId":"3c76658a-fe1a-4761-ad2d-1edd1a6b0a3b","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"easy","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"c62b6fc1-fbc3-4ff8-9027-5d74b957cd05","label":null,"content":"Give **two** reasons why software developers prefer to represent and view physical memory addresses in hexadecimal rather than in binary.","markscheme":"- States that hexadecimal is easier or quicker for humans to read, write, or remember than binary B1\n- States that it is more concise, taking up less screen space or using fewer characters B1\n- States that it reduces human errors (e.g. transposition or copying errors) B1\n- States that it is easy to convert between binary and hexadecimal because $2^4 = 16$ 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-

Number bases

Question 13

Number bases Questions

Number bases

Question 13

Number bases Questions