OCR GCSE (9–1) Computer Science J276/01 Computer Systems Question Paper INSTRUCTIONS • Use black ink. • Complete the boxes above with your name, centre number and candidate number. • Answer all the questions. • Write you
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OCR GCSE (9–1) Computer Science J276/01 Computer Systems Question Paper INSTRUCTIONS • Use black ink. • Complete the boxes above with your name, centre number and candidate number. • Answer all the questions. • Write your answer to each question in the space provided. • If additional space is required, use the lined page(s) at the end of this booklet. The question number(s) must be clearly shown. • Do not write in the bar codes. INFORMATION • The total mark for this paper is 80. • The marks for each question are shown in brackets [ ]. • Quality of extended responses will be assessed in this paper in questions marked with an *. • This document consists of 12 pages. PMT 4 1 Ann wants to purchase a new computer and is looking at two models. The specification of the CPU in each computer is shown in Fig. 1. 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 (a) 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. ……………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………….. [1] (b) Identify two internal components that are not in Fig. 1, which could improve the performance of the computers. ……………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………….. [2] (c) Explain one reason why the cache size affects the performance of the CPU. ……………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………….. [2] (d) Identify four events that take place during the fetch-execute cycle. ……………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………….. ……………………………………………………………………………………………………………….. [4]
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