AQA GCSE COMPUTER SCIENCE Paper 2 Computing concepts QP 2023

Please write clearly in block capitals Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. For the multiple -choice questions, completely fill in the lozenge alongside the appropriate answer. CORRECT METHOD WRONG METHODS If you want to change your answer you must cross out your original answer as shown. If you wish to return to an answer previously crossed out, ring the answer you now wish to select as shown. AQA GCSE COMPUTER SCIENCE Paper 2 Computing concepts QP 2023 GCSE COMPUTER SCIENCE Paper 2 Computing concepts Thursday 25 May 2023 Afternoon Time allowed: 1 hour 45 minutes Materials  There are no additional materials required for this paper.  You must not use a calculator. Instructions  Use black ink or black ball-point pen. Use pencil only for drawing.  Answer all questions.  You must answer the questions in the spaces provided.  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).  Do all rough work in this book. Cross through any work you do not want to be marked. Information  The total number of marks available for this paper is 90. Advice *Jun23 525201* IB/G/Jun23/E12 8525/2 For Examiner’s Use Question Mark 1–6 7 8 9–10 11 12 13 14 15 16 TOTAL 2 Do not write *02* IB/G/Jun23/8525/2 1 Answer all questions in the spaces provided. outside the box 0 1 . 1 The number base 2 is called binary . Shade one lozenge to show which number base is called hexadecimal . [1 mark] A 6 B 8 C 10 D 16 0 1 . 2 Shade two lozenges to show the statements that are true about hexadecimal. [2 marks] A Hexadecimal can represent a greater range of numbers than binary. B Hexadecimal is easier for people to read than binary. C Hexadecimal is faster for a computer to process than binary. D Hexadecimal is more accurate than binary. E Hexadecimal takes less space in RAM than binary. F Hexadecimal takes less time to type than binary. . Convert the decimal number 171 into binary. [1 mark] 2 0 3 Do not write outside the *03* IB/G/Jun23/8525/2 2 . Convert the hexadecimal number 2D into binary. You should show your working. [2 marks] box Answer 0 3 Add together the following three binary numbers and give your answer in binary. [2 marks] 0 1 0 1 1 0 0 0 0 0 0 1 1 0 0 1 + 0 1 0 0 1 0 1 1 0 4 Convert 16 000 000 bits to megabytes (MB). You should show your working. [2 marks] Answer MB Turn over ► 2 0