Pearson Edexcel Level 1/Level 2 GCSE (9–1)..Computer Science PAPER 1: Principles of Computer Science. Latest 2021 revision guide..

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Answer ALL questions. Write your answers in the spaces provided. Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then ... mark your new answer with a cross . 1 Most programs are written using high-level languages. (a) Identify one term used to describe a compiler. (1) A Interpreter B Low-level language C Pseudocode D Translator (b) State two types of utility software. (2) 1 ................................................................................................................................................................................................................................................................................ 2 ................................................................................................................................................................................................................................................................................ (c) Complete this sentence. (2) Instructions written in a high-level language must be converted to ........................................................................... , so that they can be executed by the ........................................................................... . (d) Explain one reason why compiled code helps protect intellectual property. (2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (Total for Question 1 = 7 marks) https://britishstudentroom-b430a.web.app/*P66482A0316* Turn over 3 2 Computers carry out comparisons. (a) Complete the truth table. (6) X Y Z Y AND Z X OR (Y AND Z) 0 1 0 0 0 1 1 1 1 1 1 0 0 1 1 1 1 1 0 0 0 0 0 0 1 0 1 0 0 1 1 0 1 0 (b) State the name of the component of the CPU that performs comparisons. (1) .................................................................................................................................................................................................................................................................................... (c) Complete this model, which is used by all computers. (1) Input ........................................................... Output (d) State the function of cache memory. (1) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (Total for Question 2 = 9 marks) https://britishstudentroom-b430a.web.app/4 *P66482A0416* 3 Algorithms are used in the design of computer programs. (a) Describe what is meant by the term ‘algorithm’. (2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (b) Draw a straight line to match each use to the correct term. (3) Use Term Making decisions Abstraction Removing unnecessary detail Initialisation Repeating code Selection Iteration Sequence https://britishstudentroom-b430a.web.app/*P66482A0516* Turn over 5 (c) Explain why it is important for computing technology to be inclusive. (2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (d) Explain one positive impact of computing technology on the environment. (2) .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (e) Some open source software requires payment from users. All open source software gives software developers certain freedoms [Show More]

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