Year_10_September_Assessment.pdf

Computer Science (J277) Year 10 September Assessment Kyle Dudley Please note that you may see slight differences between this paper and the original. Duration: 60 m...

Computer Science (J277) Year 10 September Assessment Kyle Dudley Please note that you may see slight differences between this paper and the original. Duration: 60 mins Candidates answer on the Question paper. OCR supplied materials: Additional resources may be supplied with this paper. Other materials required: Pencil Ruler (cm/mm) Candidate Candidate forename surname Centre number Candidate number INSTRUCTIONS TO CANDIDATES Write your name, centre number and candidate number in the boxes above. Please write clearly and in capital letters. Use black ink. HB pencil may be used for graphs and diagrams only. Answer all the questions, unless your teacher tells you otherwise. Read each question carefully. Make sure you know what you have to do before starting your answer. Where space is provided below the question, please write your answer there. You may use additional paper, or a specific Answer sheet if one is provided, but you must clearly show your candidate number, centre number and question number(s). INFORMATION FOR CANDIDATES The quality of written communication is assessed in questions marked with either a pencil or an asterisk. In History and Geography a Quality of extended response question is marked with an asterisk, while a pencil is used for questions in which Spelling, punctuation and grammar and the use of specialist terminology is assessed. The number of marks is given in brackets [ ] at the end of each question or part question. The total number of marks for this paper is 50. The total number of marks may take into account some 'either/or' question choices. © OCR 2024. You may photocopy this page. 1 of 9 Created in ExamBuilder  1 The specification of two CPUs is shown in Fig. 1. Computer 1 Computer 2 Clock Speed: 1 GHz Clock Speed: 1.4 GHz Cache size: 2 MB Cache size: 2 MB Number of Cores: 4 Number of Cores: 2 Fig. 1 When running a 3D flight simulator, Computer 1 is likely to run faster than Computer 2. Using the information in Fig. 1, identify one reason for this. 2 A satellite navigation system (Sat Nav) uses RAM and ROM. The Sat Nav contains an embedded system. Define what is meant by an ‘embedded system’. © OCR 2024. You may photocopy this page. 2 of 9 Created in ExamBuilder  3(a) The specification of two CPUs is shown in Fig. 1. Computer 1 Computer 2 Clock Speed: 1 GHz Clock Speed: 1.4 GHz Cache size: 2 MB Cache size: 2 MB Number of Cores: 4 Number of Cores: 2 Fig. 1 Identify two other parts of a computer that are not in Fig. 1, which could improve the performance of the computers. 1 2 (b) Explain one reason why the cache size affects the performance of the CPU. (c) Identify two events that take place during the fetch-execute cycle. 1 2 © OCR 2024. You may photocopy this page. 3 of 9 Created in ExamBuilder  4 Computer A has a single core, 3.2 GHz processor. Computer B has a single core, 1.2 GHz processor. Explain why Computer A will usually run faster than Computer B. 5 A car comes with many embedded systems, for example parking sensors. Identify one other embedded system that could be found in a car and explain why this is an embedded system. Example embedded system Explanation 6 A satellite navigation system (Sat Nav) uses RAM and ROM. Identify three devices, other than a Sat Nav, which contain embedded systems. 1 2 3 © OCR 2024. You may photocopy this page. 4 of 9 Created in ExamBuilder  7 The following paragraph describes embedded systems. Complete the paragraph by selecting terms from the list and writing them in the correct places. Not all terms are used. actuator applications change functions laptop larger lights microprocessor processor range smaller washing machine Embedded systems have limited........................................................ They are often built into a........................................................ machine. Two examples of embedded systems are a........................................................ and automated........................................................ in a car. 8 Complete the table by writing the missing definition or name of each of the common CPU components and registers. CPU component or register Definition Stores the address of the next instruction to be fetched from memory. Increments during each fetch-execute cycle. CU (Control Unit) Stores the address of the data to be fetched from or the address where the data is to be stored. Performs mathematical calculations and logical operations. © OCR 2024. You may photocopy this page. 5 of 9 Created in ExamBuilder  9 (i) The table has five components of a computer, and four statements. Tick (✓) one or more boxes in each row to identify which component(s) each statement describes. Statement MAR MDR Cache Program RAM Counter It stores a single address It stores frequently used instructions It is a register It stores all currently running data and instructions (ii) Identify the name of one register not given in part (i) and describe its purpose. Register Purpose 10(a Nina wants to transfer photos from a digital camera to an external secondary storage device. ) Define what is meant by ‘secondary storage’. © OCR 2024. You may photocopy this page. 6 of 9 Created in ExamBuilder  (b) Identify the three common types of storage Nina can choose from. 1 2 3 11 A smart television allows the user to search the Internet and watch videos online. A smart television has both RAM and ROM. (i) State the difference between RAM and ROM. (ii) Give two examples of data that a smart television could store in RAM. 1 2 © OCR 2024. You may photocopy this page. 7 of 9 Created in ExamBuilder  12 A satellite navigation system (Sat Nav) uses RAM and ROM. Tick (✓) one box in each row to show whether each of the statements is true for the RAM or ROM in a Sat Nav. RAM ROM Stores the boot up sequence of the Sat Nav. The contents are lost when the Sat Nav is turned off. Holds copies of open maps and routes. 13 Nina wants to transfer photos from a digital camera to an external secondary storage device. State four characteristics of secondary storage devices that Nina should consider when choosing a device. 1 2 3 4 © OCR 2024. You may photocopy this page. 8 of 9 Created in ExamBuilder  14 A smart television has secondary storage. (i) State, using an example, why the smart television needs secondary storage. (ii) Identify one appropriate type of secondary storage for the smart television. Justify your choice. Secondary storage type Justification END OF QUESTION PAPER © OCR 2024. You may photocopy this page. 9 of 9 Created in ExamBuilder Powered by TCPDF (www.tcpdf.org)