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COMPUTER SCIENCE 0478/12

Cambridge IGCSE This document has 12 pages. Blank pages are indicated.*6089416953*DC (CJ/CB) 186307/3 UCLES 2020 [Turn overCOMPUTER SCIENCE 0478/12 Paper 1 Theory February/March 2020 1 hour 45 minutesYou must answer on the question additional materials are 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 The total mark for this paper is 75. The number of marks for each question or part question is shown in brackets [ ].]

(b) A water control system uses a switch and two pressure sensors. The outputs of the switch and sensors are shown in the table. Sensor or Switch Output of 1 Output of 0 Switch (S1) On Off Pressure Sensor (P1) >= 3 < 3 Pressure Sensor (P2) >= 3 < 3 Create a logic circuit that will produce an output (X) of 1 when: The switch S1 is on and either ...

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Transcription of COMPUTER SCIENCE 0478/12