Specimen (2024) QP - Paper 1 CAIE Computer Science GCSE

Cambridge IGCSE™ (9–1) COMPUTER SCIENCE 0984/01 Paper 1 Computer Systems For examination from 2024 SPECIMEN PAPER 1 hour 45 minutes You must answer on the question paper. No additional materials are needed. INSTRUCTIONS ● Answer all questions. ● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs. ● Write your name, centre number and candidate number in the boxes at the top of the page. ● Write your answer to each question in the space provided. ● Do not use an erasable pen or correction fluid. ● Do not write on any bar codes. ● Calculators must not be used in this paper. INFORMATION ● The total mark for this paper is 75. ● The number of marks for each question or part question is shown in brackets [ ]. ● No marks will be awarded for using brand names of software packages or hardware. This document has 12 pages. Any blank pages are indicated. 1 A school network has several computers. Each computer in the network has a media access control (MAC) address. Hexadecimal is used for MAC addresses. Part of a MAC address is given. 97–5C–E1 Each pair of digits is stored as binary in an 8-bit register. (a) Complete the binary register for these two pairs of digits. 97 5C [4] (b) Describe what is meant by a MAC address. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... . [4] (c) Give two other uses of hexadecimal in computer science. 1 ................................................................................................................................................ 2 [2] (d) Another value is stored as binary in a register. 0 1 0 1 0 0 1 0 (i) A logical left shift of two places is performed on the binary value. Complete the binary register to show its contents after this logical left shift. [1] (ii) State one effect this logical shift has on the binary value. ........................................................................................................................................... . [1] (e) Negative denary numbers can also be represented as binary using two’s complement. Complete the binary register for the denary value −54. You must show all your working. Working space ........................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... Register: [2]