[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-207533-en":3,"doc-seo-207533-105":30,"detail-sidebar-cat-0-en-105":90},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":4,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},207533,8796096645457,"Arica Lee","https://ap-avatar.wpscdn.com/avatar/800003749518d68ffe3?x-image-process=image/resize,m_fixed,w_180,h_180&k=1779345340919836971",4,"Exam","GCSE Computer Science - Paper 2 Computing concepts - Exam practice questions","GCSE Computer Science Paper 2 tests computing concepts through a structured set of questions worth 90 marks. The paper focuses on number systems and data representation, including binary and hexadecimal, conversions, and interpreting true statements. It also covers digital audio sampling and file size calculations, bitmap and pixel representation with colour depth, and run-length encoding. Later questions assess core computing ideas such as hardware and CPU components, memory types, and the need for secondary storage, plus software definitions.","| Please write clearly in block capitals |  |  |  |\n| --- | --- | --- | --- |\n| Centre number |  | Candidate number |  |\n| Surname  \u003Cbr>Forename(s)  \u003Cbr>Candidate signature  \u003Cbr>I declare this is my own work. |  |  |  |\n\nGCSE  \nCOMPUTER SCIENCE  \nPaper 2 Computing concepts  \nThursday 25 May 2023 Afternoon Time allowed: 1 hour 45 minutes  \nMaterials  \n• There are no additional materials required for this paper.  \n• You must not use a calculator.  \nInstructions  \n• Use black ink or black ball-point pen. Use pencil only for drawing.  \n• Answer all questions.  \n• You must answer the questions in the spaces provided.  \n• If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s) .  \n• Do all rough work in this book. Cross through any work you do not want tobe marked.  \nInformation  \n• The total number of marks available for this paper is 90.  \nAdvice  \n\n| For Examiner’s Use |  |\n| --- | --- |\n| Question | Mark |\n| 1–6 |  |\n| 7 |  |\n| 8 |  |\n| 9–10 |  |\n| 11 |  |\n| 12 |  |\n| 13 |  |\n| 14 |  |\n| 15 |  |\n| 16 |  |\n| TOTAL |  |\n\n\n| For the multiple-choice questions, completely fill in the lozenge alongside the appropriate answer. |  |  |  |\n| --- | --- | --- | --- |\n| CORRECT METHOD | | WRONG METHODS | |\n| If you want to change your answer you must cross out your original answer as shown.\u003Cbr>If you wish to return to an answer previously crossed out, ring the answer you now wish to select as shown.\u003Cbr>\u003Cbr>|  |  |  |\n\n*Jun238525201* IB/G/Jun23/E12 8525/2  \n\n| Answer all questions in the spaces provided. |  |  |\n| --- | --- | --- |\n| \u003Cbr> 0  1  .  1  The number base 2 is called binary.\u003Cbr>Shade one lozenge to show which number base is called hexadecimal.\u003Cbr>[1 mark] |  |  |\n| A\u003Cbr>B\u003Cbr>C\u003Cbr>D | 681016 | |\n| \u003Cbr> 0  1  .  2  Shade two lozenges to show the statements that are true about hexadecimal.\u003Cbr>[2 marks]\u003Cbr>A Hexadecimal can represent a greater range of numbers than binary. \u003Cbr>B Hexadecimal is easier for people to read than binary. \u003Cbr>C Hexadecimal is faster for a computer to process than binary. \u003Cbr>D Hexadecimal is more accurate than binary. \u003Cbr>\u003Cbr>E Hexadecimal takes less space in RAM than binary.   \u003Cbr>F Hexadecimal takes less time to type than binary. \u003Cbr>\u003Cbr> 0  2  .  1  Convert the decimal number 171 into binary.\u003Cbr>[1 mark]\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>\u003Cbr>|  |  |\n\noutside the box  \n0  2  .  2  Convert the hexadecimal number 2D into binary.  \nYou should show your working.  \n[2 marks]  \n\n|  |\n| --- |\n|  |\n|  |\n\nAnswer    \n0  3  Add together the following three binary numbers and give your answer in binary.  \n[2 marks]  \n0 1 0 1 1 0 0 0  \n0 0 0 1 1 0 0 1  \n+ 0 1 0 0 1 0 1 1  \n0  4 Convert 16 000 000 bits to megabytes ( MB) .  \nYou should show your working.  \n[2 marks]  \nAnswer   MB  \nbox  \n\n| \u003Cbr> 0  5  Describe the binary shift that would be used to divide a binary number by four.\u003Cbr>[1 mark] |  |\n| --- | --- |\n| 0 6 . 1\u003Cbr>0 6 . 2 | When a sound wave is converted to a digital form it is sampled. The sampling rate is measured in hertz (Hz) .\u003Cbr>Define the term hertz.\u003Cbr>[1 mark]\u003Cbr>A sampling rate of 20 000 Hz and a sample resolution of four bits is used to make a digital recording of a sound that lasts 50 seconds.\u003Cbr>What is the minimum file size of the recording in megabytes ( MB)?\u003Cbr>You should show your working.\u003Cbr>[3 marks]\u003Cbr>\u003Cbr>Answer   MB |\n\noutside the box  \n\n|  |\n| --- |\n| 15 |\n\nTurn over for the next question  \nDO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED  \nbox  \n 0  7  .  1 The term pixel is short for Picture Element.  \nDefine the term pixel.  \n[1 mark]  \n 0  7  .  2 Figure 1 shows a 5 pixel x 5 pixel image. A minimum colour depth of two bits is needed to store the image.  \nFigure 1  \nExplain how the image in Figure 1 can be represented as a bitmap.  \n[3 marks]  \n\n|  |\n| --- |\n|  |\n|  |\n|  |\n|  |\n|  |\n|  |\n\noutside the box  \n 0  7  .  3 A 10 pixel x 10 pixel image contains five different colours.  \nCalculate the minimum file size, in b","cbCaiq8Q90MFKRYx","https://ap.wps.com/l/cbCaiq8Q90MFKRYx","pdf",389464,1,28,"English","en",105,"# GCSE Computer Science\n## Paper 2 Computing concepts\n## Instructions and information\n## Number systems and data representation\n## Digital audio, pixels and bitmaps\n## Run-length encoding\n## Hardware and CPU components\n## Software and memory concepts","[{\"question\":\"Is a calculator allowed for GCSE Computer Science Paper 2?\",\"answer\":\"No. The instructions state that you must not use a calculator.\"},{\"question\":\"Which topics are assessed in the paper’s computing concepts questions?\",\"answer\":\"The paper includes number bases (binary/hexadecimal), conversions, digital audio sampling and file size, bitmap representation with colour depth, run-length encoding, and hardware/CPU and memory concepts.\"},{\"question\":\"How are multiple-choice answers recorded in the paper?\",\"answer\":\"For multiple-choice questions, you must completely fill in the lozenge next to the correct answer, and use the provided method to change answers if needed.\"}]","GCSE Computer Science - 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